Current File : /home/rs/mysql/default/man/man1/ndb_restore.1
'\" t
.\" Title: \fBndb_restore\fR
.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\" Date: 08/28/2018
.\" Manual: MySQL Database System
.\" Source: MySQL 5.5
.\" Language: English
.\"
.TH "\FBNDB_RESTORE\FR" "1" "08/28/2018" "MySQL 5\&.5" "MySQL Database System"
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.SH "NAME"
ndb_restore \- restore an NDB Cluster backup
.SH "SYNOPSIS"
.HP \w'\fBndb_restore\ \fR\fB\fIoptions\fR\fR\ 'u
\fBndb_restore \fR\fB\fIoptions\fR\fR
.SH "DESCRIPTION"
.PP
The cluster restoration program is implemented as a separate command\-line utility
\fBndb_restore\fR, which can normally be found in the MySQL
bin
directory\&. This program reads the files created as a result of the backup and inserts the stored information into the database\&.
.PP
\fBndb_restore\fR
must be executed once for each of the backup files that were created by the
START BACKUP
command used to create the backup (see
Section\ \&18.5.3.2, \(lqUsing The NDB Cluster Management Client to Create a Backup\(rq)\&. This is equal to the number of data nodes in the cluster at the time that the backup was created\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBNote\fR
.ps -1
.br
.PP
Before using
\fBndb_restore\fR, it is recommended that the cluster be running in single user mode, unless you are restoring multiple data nodes in parallel\&. See
Section\ \&18.5.8, \(lqNDB Cluster Single User Mode\(rq, for more information\&.
.sp .5v
.RE
.PP
The following table includes options that are specific to the NDB Cluster native backup restoration program
\fBndb_restore\fR\&. Additional descriptions follow the table\&. For options common to most NDB Cluster programs (including
\fBndb_restore\fR), see
Options Common to NDB Cluster Programs(1)\&.
.sp
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.B Table\ \&18.298.\ \&Command\-line options for the ndb_restore program
.TS
allbox tab(:);
lB lB lB.
T{
Format
T}:T{
Description
T}:T{
Added, Deprecated, or Removed
T}
.T&
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T{
.PP
--append
T}:T{
Append data to a tab-delimited file
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--backup_path=dir_name
T}:T{
Path to backup files directory
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--backupid=#,
.PP
-b
T}:T{
Restore from the backup with the given ID
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--connect,
.PP
-c
T}:T{
Alias for --connectstring.
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--disable-indexes
T}:T{
Causes indexes from a backup to be ignored; may decrease time needed to
restore data.
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--dont_ignore_systab_0,
.PP
-f
T}:T{
Do not ignore system table during restore. Experimental only; not for
production use
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--exclude-databases=db-list
T}:T{
List of one or more databases to exclude (includes those not named)
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--exclude-intermediate-sql-tables[=TRUE|FALSE]
T}:T{
If TRUE (the default), do not restore any intermediate tables (having
names prefixed with '#sql-') that were left over from
copying ALTER TABLE operations.
T}:T{
.PP
ADDED: NDB 7.2.17
T}
T{
.PP
--exclude-missing-columns
T}:T{
Causes columns from the backup version of a table that are missing from
the version of the table in the database to be ignored.
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--exclude-missing-tables
T}:T{
Causes tables from the backup that are missing from the database to be
ignored.
T}:T{
.PP
ADDED: NDB 7.2.18
T}
T{
.PP
--exclude-tables=table-list
T}:T{
List of one or more tables to exclude (includes those in the same
database that are not named); each table reference must
include the database name
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--fields-enclosed-by=char
T}:T{
Fields are enclosed with the indicated character
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--fields-optionally-enclosed-by
T}:T{
Fields are optionally enclosed with the indicated character
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--fields-terminated-by=char
T}:T{
Fields are terminated by the indicated character
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--hex
T}:T{
Print binary types in hexadecimal format
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--include-databases=db-list
T}:T{
List of one or more databases to restore (excludes those not named)
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--include-tables=table-list
T}:T{
List of one or more tables to restore (excludes those in same database
that are not named); each table reference must include the
database name
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--lines-terminated-by=char
T}:T{
Lines are terminated by the indicated character
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--lossy-conversions,
.PP
-L
T}:T{
Allow lossy conversions of column values (type demotions or changes in
sign) when restoring data from backup
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--no-binlog
T}:T{
If a mysqld is connected and using binary logging, do not log the
restored data
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--no-restore-disk-objects,
.PP
-d
T}:T{
Do not restore objects relating to Disk Data
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--no-upgrade,
.PP
-u
T}:T{
Do not upgrade array type for varsize attributes which do not already
resize VAR data, and do not change column attributes
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--ndb-nodegroup-map=map,
.PP
-z
T}:T{
Nodegroup map for NDBCLUSTER storage engine. Syntax: list of
(source_nodegroup, destination_nodegroup)
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--nodeid=#,
.PP
-n
T}:T{
ID of node where backup was taken
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--parallelism=#,
.PP
-p
T}:T{
Number of parallel transactions to use while restoring data
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--preserve-trailing-spaces,
.PP
-P
T}:T{
Allow preservation of trailing spaces (including padding) when promoting
fixed-width string types to variable-width types
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--print
T}:T{
Print metadata, data and log to stdout (equivalent to --print_meta
--print_data --print_log)
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--print_data
T}:T{
Print data to stdout
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--print_log
T}:T{
Print to stdout
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--print_meta
T}:T{
Print metadata to stdout
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--progress-frequency=#
T}:T{
Print status of restoration each given number of seconds
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--promote-attributes,
.PP
-A
T}:T{
Allow attributes to be promoted when restoring data from backup
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--rebuild-indexes
T}:T{
Causes multithreaded rebuilding of ordered indexes found in the backup.
Number of threads used is determined by setting
BuildIndexThreads parameter.
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--restore_data,
.PP
-r
T}:T{
Restore table data and logs into NDB Cluster using the NDB API
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--restore_epoch,
.PP
-e
T}:T{
Restore epoch info into the status table. Convenient on a MySQL Cluster
replication slave for starting replication. The row in
mysql.ndb_apply_status with id 0 will be updated/inserted.
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--restore_meta,
.PP
-m
T}:T{
Restore metadata to NDB Cluster using the NDB API
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--restore-privilege-tables
T}:T{
Restore MySQL privilege tables that were previously moved to NDB.
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--rewrite-database=olddb,newdb
T}:T{
Restores to a database with a different name than the original
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--skip-broken-objects
T}:T{
Causes missing blob tables in the backup file to be ignored.
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--skip-table-check,
.PP
-s
T}:T{
Skip table structure check during restoring of data
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--skip-unknown-objects
T}:T{
Causes schema objects not recognized by ndb_restore to be ignored when
restoring a backup made from a newer MySQL Cluster version
to an older version.
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--tab=dir_name,
.PP
-T dir_name
T}:T{
Creates a tab-separated .txt file for each table in the given path
T}:T{
.PP
All MySQL 5.5 based releases
T}
T{
.PP
--verbose=#
T}:T{
Level of verbosity in output
T}:T{
.PP
All MySQL 5.5 based releases
T}
.TE
.sp 1
.PP
Typical options for this utility are shown here:
.sp
.if n \{\
.RS 4
.\}
.nf
ndb_restore [\-c \fIconnection_string\fR] \-n \fInode_id\fR \-b \fIbackup_id\fR \e
[\-m] \-r \-\-backup_path=\fI/path/to/backup/files\fR
.fi
.if n \{\
.RE
.\}
.PP
Normally, when restoring from an NDB Cluster backup,
\fBndb_restore\fR
requires at a minimum the
\fB\-\-nodeid\fR
(short form:
\fB\-n\fR),
\fB\-\-backupid\fR
(short form:
\fB\-b\fR), and
\fB\-\-backup_path\fR
options\&. In addition, when
\fBndb_restore\fR
is used to restore any tables containing unique indexes, you must include
\fB\-\-disable\-indexes\fR
or
\fB\-\-rebuild\-indexes\fR\&. (Bug #57782, Bug #11764893)
.PP
The
\fB\-c\fR
option is used to specify a connection string which tells
ndb_restore
where to locate the cluster management server (see
Section\ \&18.3.3.3, \(lqNDB Cluster Connection Strings\(rq)\&. If this option is not used, then
\fBndb_restore\fR
attempts to connect to a management server on
localhost:1186\&. This utility acts as a cluster API node, and so requires a free connection
\(lqslot\(rq
to connect to the cluster management server\&. This means that there must be at least one
[api]
or
[mysqld]
section that can be used by it in the cluster
config\&.ini
file\&. It is a good idea to keep at least one empty
[api]
or
[mysqld]
section in
config\&.ini
that is not being used for a MySQL server or other application for this reason (see
Section\ \&18.3.3.7, \(lqDefining SQL and Other API Nodes in an NDB Cluster\(rq)\&.
.PP
You can verify that
\fBndb_restore\fR
is connected to the cluster by using the
\fBSHOW\fR
command in the
\fBndb_mgm\fR
management client\&. You can also accomplish this from a system shell, as shown here:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBndb_mgm \-e "SHOW"\fR
.fi
.if n \{\
.RE
.\}
.PP
More detailed information about all options used by ndb_restore can be found in the following list:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-append\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--append
T}
.TE
.sp 1
When used with the
\fB\-\-tab\fR
and
\fB\-\-print_data\fR
options, this causes the data to be appended to any existing files having the same names\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-backup_path\fR=\fIdir_name\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--backup-path=dir_name
T}
T{
\fBType\fR
T}:T{
directory name
T}
T{
\fBDefault Value\fR
T}:T{
./
T}
.TE
.sp 1
The path to the backup directory is required; this is supplied to
\fBndb_restore\fR
using the
\fB\-\-backup_path\fR
option, and must include the subdirectory corresponding to the ID backup of the backup to be restored\&. For example, if the data node\*(Aqs
DataDir
is
/var/lib/mysql\-cluster, then the backup directory is
/var/lib/mysql\-cluster/BACKUP, and the backup files for the backup with the ID 3 can be found in
/var/lib/mysql\-cluster/BACKUP/BACKUP\-3\&. The path may be absolute or relative to the directory in which the
\fBndb_restore\fR
executable is located, and may be optionally prefixed with
\fBbackup_path=\fR\&.
.sp
It is possible to restore a backup to a database with a different configuration than it was created from\&. For example, suppose that a backup with backup ID
12, created in a cluster with two storage nodes having the node IDs
2
and
3, is to be restored to a cluster with four nodes\&. Then
\fBndb_restore\fR
must be run twice\(emonce for each storage node in the cluster where the backup was taken\&. However,
\fBndb_restore\fR
cannot always restore backups made from a cluster running one version of MySQL to a cluster running a different MySQL version\&. See
Section\ \&18.2.7, \(lqUpgrading and Downgrading NDB Cluster\(rq, for more information\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBImportant\fR
.ps -1
.br
It is not possible to restore a backup made from a newer version of NDB Cluster using an older version of
\fBndb_restore\fR\&. You can restore a backup made from a newer version of MySQL to an older cluster, but you must use a copy of
\fBndb_restore\fR
from the newer NDB Cluster version to do so\&.
.sp
For example, to restore a cluster backup taken from a cluster running NDB 7\&.2\&.5 to a cluster running NDB 7\&.1\&.21, you must use the
\fBndb_restore\fR
that comes with the NDB 7\&.2\&.5 distribution\&.
.sp .5v
.RE
For more rapid restoration, the data may be restored in parallel, provided that there is a sufficient number of cluster connections available\&. That is, when restoring to multiple nodes in parallel, you must have an
[api]
or
[mysqld]
section in the cluster
config\&.ini
file available for each concurrent
\fBndb_restore\fR
process\&. However, the data files must always be applied before the logs\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-backupid\fR=\fI#\fR,
\fB\-b\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--backupid=#
T}
T{
\fBType\fR
T}:T{
numeric
T}
T{
\fBDefault Value\fR
T}:T{
none
T}
.TE
.sp 1
This option is used to specify the ID or sequence number of the backup, and is the same number shown by the management client in the
Backup \fIbackup_id\fR completed
message displayed upon completion of a backup\&. (See
Section\ \&18.5.3.2, \(lqUsing The NDB Cluster Management Client to Create a Backup\(rq\&.)
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBImportant\fR
.ps -1
.br
When restoring cluster backups, you must be sure to restore all data nodes from backups having the same backup ID\&. Using files from different backups will at best result in restoring the cluster to an inconsistent state, and may fail altogether\&.
.sp .5v
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-connect\fR,
\fB\-c\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--connect
T}
T{
\fBType\fR
T}:T{
string
T}
T{
\fBDefault Value\fR
T}:T{
localhost:1186
T}
.TE
.sp 1
Alias for
\fB\-\-ndb\-connectstring\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-disable\-indexes\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--disable-indexes
T}
.TE
.sp 1
Disable restoration of indexes during restoration of the data from a native
NDB
backup\&. Afterwards, you can restore indexes for all tables at once with multithreaded building of indexes using
\fB\-\-rebuild\-indexes\fR, which should be faster than rebuilding indexes concurrently for very large tables\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-dont_ignore_systab_0\fR,
\fB\-f\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--dont-ignore-systab-0
T}
.TE
.sp 1
Normally, when restoring table data and metadata,
\fBndb_restore\fR
ignores the copy of the
NDB
system table that is present in the backup\&.
\fB\-\-dont_ignore_systab_0\fR
causes the system table to be restored\&.
\fIThis option is intended for experimental and development use only, and is not recommended in a production environment\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-exclude\-databases\fR=\fIdb\-list\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--exclude-databases=db-list
T}
T{
\fBType\fR
T}:T{
string
T}
T{
\fBDefault Value\fR
T}:T{
T}
.TE
.sp 1
Comma\-delimited list of one or more databases which should not be restored\&.
.sp
This option is often used in combination with
\fB\-\-exclude\-tables\fR; see that option\*(Aqs description for further information and examples\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-exclude\-intermediate\-sql\-tables[\fR=\fITRUE|FALSE]\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--exclude-intermediate-sql-tables[=TRUE|FALSE]
T}
T{
\fBIntroduced\fR
T}:T{
5.5.37-ndb-7.2.17
T}
T{
\fBType\fR
T}:T{
boolean
T}
T{
\fBDefault Value\fR
T}:T{
TRUE
T}
.TE
.sp 1
When performing copying
ALTER TABLE
operations,
\fBmysqld\fR
creates intermediate tables (whose names are prefixed with
#sql\-)\&. When
TRUE, the
\fB\-\-exclude\-intermediate\-sql\-tables\fR
option keeps
\fBndb_restore\fR
from restoring such tables that may have been left over from these operations\&. This option is
TRUE
by default\&.
.sp
This option was introduced in NDB 7\&.2\&.17\&. (Bug #17882305)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-exclude\-missing\-columns\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--exclude-missing-columns
T}
.TE
.sp 1
It is possible to restore only selected table columns using this option, which causes
\fBndb_restore\fR
to ignore any columns missing from tables being restored as compared to the versions of those tables found in the backup\&. This option applies to all tables being restored\&. If you wish to apply this option only to selected tables or databases, you can use it in combination with one or more of the
\fB\-\-include\-*\fR
or
\fB\-\-exclude\-*\fR
options described elsewhere in this section to do so, then restore data to the remaining tables using a complementary set of these options\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-exclude\-missing\-tables\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--exclude-missing-tables
T}
T{
\fBIntroduced\fR
T}:T{
5.5.40-ndb-7.2.18
T}
.TE
.sp 1
It is possible to restore only selected tables using this option, which causes
\fBndb_restore\fR
to ignore any tables from the backup that are not found in the target database\&.
.sp
This option was introduced in NDB 7\&.2\&.18\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-exclude\-tables\fR=\fItable\-list\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--exclude-tables=table-list
T}
T{
\fBType\fR
T}:T{
string
T}
T{
\fBDefault Value\fR
T}:T{
T}
.TE
.sp 1
List of one or more tables to exclude; each table reference must include the database name\&. Often used together with
\fB\-\-exclude\-databases\fR\&.
.sp
When
\fB\-\-exclude\-databases\fR
or
\fB\-\-exclude\-tables\fR
is used, only those databases or tables named by the option are excluded; all other databases and tables are restored by
\fBndb_restore\fR\&.
.sp
This table shows several invocations of
\fBndb_restore\fR
usng
\fB\-\-exclude\-*\fR
options (other options possibly required have been omitted for clarity), and the effects these options have on restoring from an NDB Cluster backup:
.sp
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.B Table\ \&18.299.\ \&Several invocations of ndb_restore using \-\-exclude\-* options, and the effects these options have on restoring from an NDB Cluster backup\&.
.TS
allbox tab(:);
lB lB.
T{
Option
T}:T{
Result
T}
.T&
l l
l l
l l
l l.
T{
\fB--exclude-databases=db1\fR
T}:T{
All tables in all databases except db1 are restored;
no tables in db1 are restored
T}
T{
\fB--exclude-databases=db1,db2\fR (or
\fB--exclude-databases=db1\fR
\fB--exclude-databases=db2\fR)
T}:T{
All tables in all databases except db1 and
db2 are restored; no tables in
db1 or db2 are
restored
T}
T{
\fB--exclude-tables=db1.t1\fR
T}:T{
All tables except t1 in database
db1 are restored; all other tables
in db1 are restored; all tables in
all other databases are restored
T}
T{
\fB--exclude-tables=db1.t2,db2.t1\fR (or
\fB--exclude-tables=db1.t2\fR
\fB--exclude-tables=db2.t1)\fR
T}:T{
All tables in database db1 except for
t2 and all tables in database
db2 except for table
t1 are restored; no other tables in
db1 or db2 are
restored; all tables in all other databases are
restored
T}
.TE
.sp 1
You can use these two options together\&. For example, the following causes all tables in all databases
\fIexcept for\fR
databases
db1
and
db2, and tables
t1
and
t2
in database
db3, to be restored:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBndb_restore [\&.\&.\&.] \-\-exclude\-databases=db1,db2 \-\-exclude\-tables=db3\&.t1,db3\&.t2\fR
.fi
.if n \{\
.RE
.\}
.sp
(Again, we have omitted other possibly necessary options in the interest of clarity and brevity from the example just shown\&.)
.sp
You can use
\fB\-\-include\-*\fR
and
\fB\-\-exclude\-*\fR
options together, subject to the following rules:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
The actions of all
\fB\-\-include\-*\fR
and
\fB\-\-exclude\-*\fR
options are cumulative\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
All
\fB\-\-include\-*\fR
and
\fB\-\-exclude\-*\fR
options are evaluated in the order passed to ndb_restore, from right to left\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
In the event of conflicting options, the first (rightmost) option takes precedence\&. In other words, the first option (going from right to left) that matches against a given database or table
\(lqwins\(rq\&.
.RE
.sp
For example, the following set of options causes
\fBndb_restore\fR
to restore all tables from database
db1
except
db1\&.t1, while restoring no other tables from any other databases:
.sp
.if n \{\
.RS 4
.\}
.nf
\-\-include\-databases=db1 \-\-exclude\-tables=db1\&.t1
.fi
.if n \{\
.RE
.\}
.sp
However, reversing the order of the options just given simply causes all tables from database
db1
to be restored (including
db1\&.t1, but no tables from any other database), because the
\fB\-\-include\-databases\fR
option, being farthest to the right, is the first match against database
db1
and thus takes precedence over any other option that matches
db1
or any tables in
db1:
.sp
.if n \{\
.RS 4
.\}
.nf
\-\-exclude\-tables=db1\&.t1 \-\-include\-databases=db1
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-fields\-enclosed\-by\fR=\fIchar\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--fields-enclosed-by=char
T}
T{
\fBType\fR
T}:T{
string
T}
T{
\fBDefault Value\fR
T}:T{
T}
.TE
.sp 1
Each column value is enclosed by the string passed to this option (regardless of data type; see the description of
\fB\-\-fields\-optionally\-enclosed\-by\fR)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-fields\-optionally\-enclosed\-by\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--fields-optionally-enclosed-by
T}
T{
\fBType\fR
T}:T{
string
T}
T{
\fBDefault Value\fR
T}:T{
T}
.TE
.sp 1
The string passed to this option is used to enclose column values containing character data (such as
CHAR,
VARCHAR,
BINARY,
TEXT, or
ENUM)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-fields\-terminated\-by\fR=\fIchar\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--fields-terminated-by=char
T}
T{
\fBType\fR
T}:T{
string
T}
T{
\fBDefault Value\fR
T}:T{
\t (tab)
T}
.TE
.sp 1
The string passed to this option is used to separate column values\&. The default value is a tab character (\et)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-hex\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--hex
T}
.TE
.sp 1
If this option is used, all binary values are output in hexadecimal format\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-include\-databases\fR=\fIdb\-list\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--include-databases=db-list
T}
T{
\fBType\fR
T}:T{
string
T}
T{
\fBDefault Value\fR
T}:T{
T}
.TE
.sp 1
Comma\-delimited list of one or more databases to restore\&. Often used together with
\fB\-\-include\-tables\fR; see the description of that option for further information and examples\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-include\-tables\fR=\fItable\-list\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--include-tables=table-list
T}
T{
\fBType\fR
T}:T{
string
T}
T{
\fBDefault Value\fR
T}:T{
T}
.TE
.sp 1
Comma\-delimited list of tables to restore; each table reference must include the database name\&.
.sp
When
\fB\-\-include\-databases\fR
or
\fB\-\-include\-tables\fR
is used, only those databases or tables named by the option are restored; all other databases and tables are excluded by
\fBndb_restore\fR, and are not restored\&.
.sp
The following table shows several invocations of
\fBndb_restore\fR
using
\fB\-\-include\-*\fR
options (other options possibly required have been omitted for clarity), and the effects these have on restoring from an NDB Cluster backup:
.sp
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.B Table\ \&18.300.\ \&Several invocations of ndb_restore using \-\-include\-* options, and their effects on restoring from an NDB Cluster backup\&.
.TS
allbox tab(:);
lB lB.
T{
Option
T}:T{
Result
T}
.T&
l l
l l
l l
l l.
T{
\fB--include-databases=db1\fR
T}:T{
Only tables in database db1 are restored; all tables
in all other databases are ignored
T}
T{
\fB--include-databases=db1,db2\fR (or
\fB--include-databases=db1\fR
\fB--include-databases=db2\fR)
T}:T{
Only tables in databases db1 and
db2 are restored; all tables in all
other databases are ignored
T}
T{
\fB--include-tables=db1.t1\fR
T}:T{
Only table t1 in database db1 is
restored; no other tables in db1 or
in any other database are restored
T}
T{
\fB--include-tables=db1.t2,db2.t1\fR (or
\fB--include-tables=db1.t2\fR
\fB--include-tables=db2.t1\fR)
T}:T{
Only the table t2 in database db1
and the table t1 in database
db2 are restored; no other tables
in db1, db2, or
any other database are restored
T}
.TE
.sp 1
You can also use these two options together\&. For example, the following causes all tables in databases
db1
and
db2, together with the tables
t1
and
t2
in database
db3, to be restored (and no other databases or tables):
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBndb_restore [\&.\&.\&.] \-\-include\-databases=db1,db2 \-\-include\-tables=db3\&.t1,db3\&.t2\fR
.fi
.if n \{\
.RE
.\}
.sp
(Again we have omitted other, possibly required, options in the example just shown\&.)
.sp
It also possible to restore only selected databases, or selected tables from a single database, without any
\fB\-\-include\-*\fR
(or
\fB\-\-exclude\-*\fR) options, using the syntax shown here:
.sp
.if n \{\
.RS 4
.\}
.nf
ndb_restore \fIother_options\fR \fIdb_name\fR,[\fIdb_name\fR[,\&.\&.\&.] | \fItbl_name\fR[,\fItbl_name\fR][,\&.\&.\&.]]
.fi
.if n \{\
.RE
.\}
.sp
In other words, you can specify either of the following to be restored:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
All tables from one or more databases
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
One or more tables from a single database
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-lines\-terminated\-by\fR=\fIchar\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--lines-terminated-by=char
T}
T{
\fBType\fR
T}:T{
string
T}
T{
\fBDefault Value\fR
T}:T{
\n (linebreak)
T}
.TE
.sp 1
Specifies the string used to end each line of output\&. The default is a linefeed character (\en)\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-lossy\-conversions\fR,
\fB\-L\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--lossy-conversions
T}
T{
\fBType\fR
T}:T{
boolean
T}
T{
\fBDefault Value\fR
T}:T{
FALSE (If option is not used)
T}
.TE
.sp 1
This option is intended to complement the
\fB\-\-promote\-attributes\fR
option\&. Using
\fB\-\-lossy\-conversions\fR
allows lossy conversions of column values (type demotions or changes in sign) when restoring data from backup\&. With some exceptions, the rules governing demotion are the same as for MySQL replication; see
Section\ \&17.4.1.9.2, \(lqReplication of Columns Having Different Data Types\(rq, for information about specific type conversions currently supported by attribute demotion\&.
.sp
\fBndb_restore\fR
reports any truncation of data that it performs during lossy conversions once per attribute and column\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-no\-binlog\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--no-binlog
T}
.TE
.sp 1
This option prevents any connected SQL nodes from writing data restored by
\fBndb_restore\fR
to their binary logs\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-no\-restore\-disk\-objects\fR,
\fB\-d\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--no-restore-disk-objects
T}
T{
\fBType\fR
T}:T{
boolean
T}
T{
\fBDefault Value\fR
T}:T{
FALSE
T}
.TE
.sp 1
This option stops
\fBndb_restore\fR
from restoring any NDB Cluster Disk Data objects, such as tablespaces and log file groups; see
Section\ \&18.5.12, \(lqNDB Cluster Disk Data Tables\(rq, for more information about these\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-no\-upgrade\fR,
\fB\-u\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--no-upgrade
T}
.TE
.sp 1
When using
\fBndb_restore\fR
to restore a backup,
VARCHAR
columns created using the old fixed format are resized and recreated using the variable\-width format now employed\&. This behavior can be overridden by specifying
\fB\-\-no\-upgrade\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-ndb\-nodegroup\-map\fR=\fImap\fR,
\fB\-z\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--ndb-nodegroup-map=map
T}
.TE
.sp 1
This option can be used to restore a backup taken from one node group to a different node group\&. Its argument is a list of the form
\fIsource_node_group\fR, \fItarget_node_group\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-nodeid\fR=\fI#\fR,
\fB\-n\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--nodeid=#
T}
T{
\fBType\fR
T}:T{
numeric
T}
T{
\fBDefault Value\fR
T}:T{
none
T}
.TE
.sp 1
Specify the node ID of the data node on which the backup was taken\&.
.sp
When restoring to a cluster with different number of data nodes from that where the backup was taken, this information helps identify the correct set or sets of files to be restored to a given node\&. (In such cases, multiple files usually need to be restored to a single data node\&.) See
the section called \(lqRestoring to a different number of data nodes\(rq, for additional information and examples\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-parallelism\fR=\fI#\fR,
\fB\-p\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--parallelism=#
T}
T{
\fBType\fR
T}:T{
numeric
T}
T{
\fBDefault Value\fR
T}:T{
128
T}
T{
\fBMinimum Value\fR
T}:T{
1
T}
T{
\fBMaximum Value\fR
T}:T{
1024
T}
.TE
.sp 1
\fBndb_restore\fR
uses single\-row transactions to apply many rows concurrently\&. This parameter determines the number of parallel transactions (concurrent rows) that an instance of
\fBndb_restore\fR
tries to use\&. By default, this is 128; the minimum is 1, and the maximum is 1024\&.
.sp
The work of performing the inserts is parallelized across the threads in the data nodes involved\&. This mechanism is employed for restoring bulk data from the
\&.Data
file\(emthat is, the fuzzy snapshot of the data; it is not used for building or rebuilding indexes\&. The change log is applied serially; index drops and builds are DDL operations and handled separately\&. There is no thread\-level parallelism on the client side of the restore\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-preserve\-trailing\-spaces\fR,
\fB\-P\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--preserve-trailing-spaces
T}
.TE
.sp 1
Cause trailing spaces to be preserved when promoting a fixed\-width character data type to its variable\-width equivalent\(emthat is, when promoting a
CHAR
column value to
VARCHAR, or a
BINARY
column value to
VARBINARY\&. Otherwise, any trailing spaces are dropped from such column values when they are inserted into the new columns\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBNote\fR
.ps -1
.br
Although you can promote
CHAR
columns to
VARCHAR
and
BINARY
columns to
VARBINARY, you cannot promote
VARCHAR
columns to
CHAR
or
VARBINARY
columns to
BINARY\&.
.sp .5v
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-print\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--print
T}
T{
\fBType\fR
T}:T{
boolean
T}
T{
\fBDefault Value\fR
T}:T{
FALSE
T}
.TE
.sp 1
Causes
\fBndb_restore\fR
to print all data, metadata, and logs to
stdout\&. Equivalent to using the
\fB\-\-print_data\fR,
\fB\-\-print_meta\fR, and
\fB\-\-print_log\fR
options together\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBNote\fR
.ps -1
.br
Use of
\fB\-\-print\fR
or any of the
\fB\-\-print_*\fR
options is in effect performing a dry run\&. Including one or more of these options causes any output to be redirected to
stdout; in such cases,
\fBndb_restore\fR
makes no attempt to restore data or metadata to an NDB Cluster\&.
.sp .5v
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-print_data\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--print-data
T}
T{
\fBType\fR
T}:T{
boolean
T}
T{
\fBDefault Value\fR
T}:T{
FALSE
T}
.TE
.sp 1
Cause
\fBndb_restore\fR
to direct its output to
stdout\&. Often used together with one or more of
\fB\-\-tab\fR,
\fB\-\-fields\-enclosed\-by\fR,
\fB\-\-fields\-optionally\-enclosed\-by\fR,
\fB\-\-fields\-terminated\-by\fR,
\fB\-\-hex\fR, and
\fB\-\-append\fR\&.
.sp
TEXT
and
BLOB
column values are always truncated\&. In NDB 7\&.2\&.18 and earlier, such values are truncated to the first 240 bytes in the output; in NDB 7\&.2\&.19 and later, they are truncated to 256 bytes\&. (Bug #14571512, Bug #65467) This cannot currently be overridden when using
\fB\-\-print_data\fR\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-print_log\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--print-log
T}
T{
\fBType\fR
T}:T{
boolean
T}
T{
\fBDefault Value\fR
T}:T{
FALSE
T}
.TE
.sp 1
Cause
\fBndb_restore\fR
to output its log to
stdout\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-print_meta\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--print-meta
T}
T{
\fBType\fR
T}:T{
boolean
T}
T{
\fBDefault Value\fR
T}:T{
FALSE
T}
.TE
.sp 1
Print all metadata to
stdout\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-progress\-frequency\fR=\fIN\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--progress-frequency=#
T}
T{
\fBType\fR
T}:T{
numeric
T}
T{
\fBDefault Value\fR
T}:T{
0
T}
T{
\fBMinimum Value\fR
T}:T{
0
T}
T{
\fBMaximum Value\fR
T}:T{
65535
T}
.TE
.sp 1
Print a status report each
\fIN\fR
seconds while the restore is in progress\&. 0 (the default) causes no status reports to be printed\&. The maximum is 65535\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-promote\-attributes\fR,
\fB\-A\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--promote-attributes
T}
.TE
.sp 1
\fBndb_restore\fR
supports limited
\fIattribute promotion\fR
in much the same way that it is supported by MySQL replication; that is, data backed up from a column of a given type can generally be restored to a column using a
\(lqlarger, similar\(rq
type\&. For example, data from a
CHAR(20)
column can be restored to a column declared as
VARCHAR(20),
VARCHAR(30), or
CHAR(30); data from a
MEDIUMINT
column can be restored to a column of type
INT
or
BIGINT\&. See
Section\ \&17.4.1.9.2, \(lqReplication of Columns Having Different Data Types\(rq, for a table of type conversions currently supported by attribute promotion\&.
.sp
Attribute promotion by
\fBndb_restore\fR
must be enabled explicitly, as follows:
.sp
.RS 4
.ie n \{\
\h'-04' 1.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 1." 4.2
.\}
Prepare the table to which the backup is to be restored\&.
\fBndb_restore\fR
cannot be used to re\-create the table with a different definition from the original; this means that you must either create the table manually, or alter the columns which you wish to promote using
ALTER TABLE
after restoring the table metadata but before restoring the data\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 2.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 2." 4.2
.\}
Invoke
\fBndb_restore\fR
with the
\fB\-\-promote\-attributes\fR
option (short form
\fB\-A\fR) when restoring the table data\&. Attribute promotion does not occur if this option is not used; instead, the restore operation fails with an error\&.
.RE
.sp
Prior to NDB 7\&.2\&.14, conversions between character data types and
TEXT
or
BLOB
were not handled correctly\&.
.sp
Prior to NDB 7\&.2\&.18, demotion of
TEXT
to
TINYTEXT
was not handled correctly (Bug #18875137)\&.
.sp
When converting between character data types and
TEXT
or
BLOB, only conversions between character types (CHAR
and
VARCHAR) and binary types (BINARY
and
VARBINARY) can be performed at the same time\&. For example, you cannot promote an
INT
column to
BIGINT
while promoting a
VARCHAR
column to
TEXT
in the same invocation of
\fBndb_restore\fR\&.
.sp
Converting between
TEXT
columns using different character sets is not supported\&. Beginning with NDB 7\&.2\&.18, it is expressly disallowed (Bug #18875137)\&.
.sp
When performing conversions of character or binary types to
TEXT
or
BLOB
with
\fBndb_restore\fR, you may notice that it creates and uses one or more staging tables named
\fItable_name\fR$ST\fInode_id\fR\&. These tables are not needed afterwards, and are normally deleted by
\fBndb_restore\fR
following a successful restoration\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-rebuild\-indexes\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--rebuild-indexes
T}
.TE
.sp 1
Enable multithreaded rebuilding of the ordered indexes while restoring a native
NDB
backup\&. The number of threads used for building ordered indexes by
\fBndb_restore\fR
with this option is controlled by the
BuildIndexThreads
data node configuration parameter and the number of LDMs\&.
It is necessary to use this option only for the first run of
\fBndb_restore\fR; this causes all ordered indexes to be rebuilt without using
\fB\-\-rebuild\-indexes\fR
again when restoring subsequent nodes\&. You should use this option prior to inserting new rows into the database; otherwise, it is possible for a row to be inserted that later causes a unique constraint violation when trying to rebuild the indexes\&.
.sp
Building of ordered indices is parallelized with the number of LDMs by default\&. Offline index builds performed during node and system restarts can be made faster using the
BuildIndexThreads
data node configuration parameter; this parameter has no effect on dropping and rebuilding of indexes by
\fBndb_restore\fR, which is performed online\&.
.sp
Rebuilding of unique indexes uses disk write bandwidth for redo logging and local checkpointing\&. An insufficient amount of this bandwith can lead to redo buffer overload or log overload errors\&. In such cases you can run
\fBndb_restore\fR
\fB\-\-rebuild\-indexes\fR
again; the process resumes at the point where the error occurred\&. You can also do this when you have encountered temporary errors\&. You can repeat execution of
\fBndb_restore\fR
\fB\-\-rebuild\-indexes\fR
indefinitely; you may be able to stop such errors by reducing the value of
\fB\-\-parallelism\fR\&. If the problem is insufficient space, you can increase the size of the redo log (FragmentLogFileSize
node configuration parameter), or you can increase the speed at which LCPs are performed (MaxDiskWriteSpeed
and related parameters), in order to free space more quickly\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-restore_data\fR,
\fB\-r\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--restore-data
T}
T{
\fBType\fR
T}:T{
boolean
T}
T{
\fBDefault Value\fR
T}:T{
FALSE
T}
.TE
.sp 1
Output
NDB
table data and logs\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-restore_epoch\fR,
\fB\-e\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--restore-epoch
T}
.TE
.sp 1
Add (or restore) epoch information to the cluster replication status table\&. This is useful for starting replication on an NDB Cluster replication slave\&. When this option is used, the row in the
mysql\&.ndb_apply_status
having
0
in the
id
column is updated if it already exists; such a row is inserted if it does not already exist\&. (See
Section\ \&18.6.9, \(lqNDB Cluster Backups With NDB Cluster Replication\(rq\&.)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-restore_meta\fR,
\fB\-m\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--restore-meta
T}
T{
\fBType\fR
T}:T{
boolean
T}
T{
\fBDefault Value\fR
T}:T{
FALSE
T}
.TE
.sp 1
This option causes
\fBndb_restore\fR
to print
NDB
table metadata\&.
.sp
The first time you run the
\fBndb_restore\fR
restoration program, you also need to restore the metadata\&. In other words, you must re\-create the database tables\(emthis can be done by running it with the
\fB\-\-restore_meta\fR
(\fB\-m\fR) option\&. Restoring the metadata need be done only on a single data node; this is sufficient to restore it to the entire cluster\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBNote\fR
.ps -1
.br
The cluster should have an empty database when starting to restore a backup\&. (In other words, you should start the data nodes with
\fB\-\-initial\fR
prior to performing the restore\&.)
.sp .5v
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-restore\-privilege\-tables\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--restore-privilege-tables
T}
T{
\fBType\fR
T}:T{
boolean
T}
T{
\fBDefault Value\fR
T}:T{
FALSE (If option is not used)
T}
.TE
.sp 1
\fBndb_restore\fR
does not by default restore distributed MySQL privilege tables\&. This option causes
\fBndb_restore\fR
to restore the privilege tables\&.
.sp
This works only if the privilege tables were converted to
NDB
before the backup was taken\&. For more information, see
Section\ \&18.5.14, \(lqDistributed MySQL Privileges for NDB Cluster\(rq\&.
.sp
This option was added in NDB 7\&.2\&.0\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-rewrite\-database\fR=\fIolddb,newdb\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--rewrite-database=olddb,newdb
T}
T{
\fBType\fR
T}:T{
string
T}
T{
\fBDefault Value\fR
T}:T{
none
T}
.TE
.sp 1
This option makes it possible to restore to a database having a different name from that used in the backup\&. For example, if a backup is made of a database named
products, you can restore the data it contains to a database named
inventory, use this option as shown here (omitting any other options that might be required):
.sp
.if n \{\
.RS 4
.\}
.nf
shell> ndb_restore \-\-rewrite\-database=product,inventory
.fi
.if n \{\
.RE
.\}
.sp
The option can be employed multiple times in a single invocation of
\fBndb_restore\fR\&. Thus it is possible to restore simultaneously from a database named
db1
to a database named
db2
and from a database named
db3
to one named
db4
using
\fB\-\-rewrite\-database=db1,db2 \-\-rewrite\-database=db3,db4\fR\&. Other
\fBndb_restore\fR
options may be used between multiple occurrences of
\fB\-\-rewrite\-database\fR\&.
.sp
In the event of conflicts between multiple
\fB\-\-rewrite\-database\fR
options, the last
\fB\-\-rewrite\-database\fR
option used, reading from left to right, is the one that takes effect\&. For example, if
\fB\-\-rewrite\-database=db1,db2 \-\-rewrite\-database=db1,db3\fR
is used, only
\fB\-\-rewrite\-database=db1,db3\fR
is honored, and
\fB\-\-rewrite\-database=db1,db2\fR
is ignored\&. It is also possible to restore from multiple databases to a single database, so that
\fB\-\-rewrite\-database=db1,db3 \-\-rewrite\-database=db2,db3\fR
restores all tables and data from databases
db1
and
db2
into database
db3\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBImportant\fR
.ps -1
.br
When restoring from multiple backup databases into a single target database using
\fB\-\-rewrite\-database\fR, no check is made for collisions between table or other object names, and the order in which rows are restored is not guaranteed\&. This means that it is possible in such cases for rows to be overwritten and updates to be lost\&.
.sp .5v
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-skip\-broken\-objects\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--skip-broken-objects
T}
.TE
.sp 1
This option causes
\fBndb_restore\fR
to ignore corrupt tables while reading a native
NDB
backup, and to continue restoring any remaining tables (that are not also corrupted)\&. Currently, the
\fB\-\-skip\-broken\-objects\fR
option works only in the case of missing blob parts tables\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-skip\-table\-check\fR,
\fB\-s\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--skip-table-check
T}
.TE
.sp 1
It is possible to restore data without restoring table metadata\&. By default when doing this,
\fBndb_restore\fR
fails with an error if a mismatch is found between the table data and the table schema; this option overrides that behavior\&.
.sp
Some of the restrictions on mismatches in column definitions when restoring data using
\fBndb_restore\fR
are relaxed; when one of these types of mismatches is encountered,
\fBndb_restore\fR
does not stop with an error as it did previously, but rather accepts the data and inserts it into the target table while issuing a warning to the user that this is being done\&. This behavior occurs whether or not either of the options
\fB\-\-skip\-table\-check\fR
or
\fB\-\-promote\-attributes\fR
is in use\&. These differences in column definitions are of the following types:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Different
COLUMN_FORMAT
settings (FIXED,
DYNAMIC,
DEFAULT)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Different
STORAGE
settings (MEMORY,
DISK)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Different default values
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Different distribution key settings
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-skip\-unknown\-objects\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--skip-unknown-objects
T}
.TE
.sp 1
This option causes
\fBndb_restore\fR
to ignore any schema objects it does not recognize while reading a native
NDB
backup\&. This can be used for restoring a backup made from a cluster running NDB 7\&.5 to a cluster running NDB Cluster 7\&.4\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-tab\fR=\fIdir_name\fR,
\fB\-T\fR
\fIdir_name\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--tab=dir_name
T}
T{
\fBType\fR
T}:T{
directory name
T}
.TE
.sp 1
Causes
\fB\-\-print_data\fR
to create dump files, one per table, each named
\fItbl_name\fR\&.txt\&. It requires as its argument the path to the directory where the files should be saved; use
\&.
for the current directory\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-\-verbose\fR=\fI#\fR
.TS
allbox tab(:);
lB lB.
T{
Property
T}:T{
Value
T}
.T&
l l
l l
l l
l l
l l.
T{
\fBCommand-Line Format\fR
T}:T{
--verbose=#
T}
T{
\fBType\fR
T}:T{
numeric
T}
T{
\fBDefault Value\fR
T}:T{
1
T}
T{
\fBMinimum Value\fR
T}:T{
0
T}
T{
\fBMaximum Value\fR
T}:T{
255
T}
.TE
.sp 1
Sets the level for the verbosity of the output\&. The minimum is 0; the maximum is 255\&. The default value is 1\&.
.RE
.PP
\fBError reporting\fR. \fBndb_restore\fR
reports both temporary and permanent errors\&. In the case of temporary errors, it may able to recover from them, and reports
Restore successful, but encountered temporary error, please look at configuration
in such cases\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBImportant\fR
.ps -1
.br
.PP
After using
\fBndb_restore\fR
to initialize an NDB Cluster for use in circular replication, binary logs on the SQL node acting as the replication slave are not automatically created, and you must cause them to be created manually\&. To cause the binary logs to be created, issue a
SHOW TABLES
statement on that SQL node before running
START SLAVE\&. This is a known issue in NDB Cluster\&.
.sp .5v
.RE
.SS "Restoring to a different number of data nodes"
.PP
It is possible to restore from an NDB backup to a cluster having a different number of data nodes than the original from which the backup was taken\&. The following two sections discuss, respectively, the cases where the target cluster has a lesser or greater number of data nodes than the source of the backup\&.
.sp
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBRestoring to Fewer Nodes Than the Original\fR
.RS 4
.PP
You can restore to a cluster having fewer data nodes than the original provided that the larger number of nodes is an even multiple of the smaller number\&. In the following example, we use a backup taken on a cluster having four data nodes to a cluster having two data nodes\&.
.sp
.RS 4
.ie n \{\
\h'-04' 1.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 1." 4.2
.\}
The management server for the original cluster is on host
host10\&. The original cluster has four data nodes, with the node IDs and host names shown in the following extract from the management server\*(Aqs
config\&.ini
file:
.sp
.if n \{\
.RS 4
.\}
.nf
[ndbd]
NodeId=2
HostName=host2
[ndbd]
NodeId=4
HostName=host4
[ndbd]
NodeId=6
HostName=host6
[ndbd]
NodeId=8
HostName=host8
.fi
.if n \{\
.RE
.\}
.sp
We assume that each data node was originally started with
\fBndbmtd\fR
\fB\-\-ndb\-connectstring=host10\fR
or the equivalent\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 2.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 2." 4.2
.\}
Perform a backup in the normal manner\&. See
Section\ \&18.5.3.2, \(lqUsing The NDB Cluster Management Client to Create a Backup\(rq, for information about how to do this\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 3.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 3." 4.2
.\}
The files created by the backup on each data node are listed here, where
\fIN\fR
is the node ID and
\fIB\fR
is the backup ID\&.
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-\fIB\fR\-0\&.\fIN\fR\&.Data
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-\fIB\fR\&.\fIN\fR\&.ctl
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-\fIB\fR\&.\fIN\fR\&.log
.RE
.sp
These files are found under
BackupDataDir/BACKUP/BACKUP\-\fIB\fR, on each data node\&. For the rest of this example, we assume that the backup ID is 1\&.
.sp
Have all of these files available for later copying to the new data nodes (where they can be accessed on the data node\*(Aqs local file system by
\fBndb_restore\fR)\&. It is simplest to copy them all to a single location; we assume that this is what you have done\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 4.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 4." 4.2
.\}
The management server for the target cluster is on host
host20, and the target has two data nodes, with the node IDs and host names shown, from the management server
config\&.ini
file on
host20:
.sp
.if n \{\
.RS 4
.\}
.nf
[ndbd]
NodeId=3
hostname=host3
[ndbd]
NodeId=5
hostname=host5
.fi
.if n \{\
.RE
.\}
.sp
Each of the data node processes on
host3
and
host5
should be started with
\fBndbmtd\fR
\fB\-c host20\fR
\fB\-\-initial\fR
or the equivalent, so that the new (target) cluster starts with clean data node file systems\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 5.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 5." 4.2
.\}
Copy two different sets of two backup files to each of the target data nodes\&. For this example, copy the backup files from nodes 2 and 6 from the original cluster to node 3 in the target cluster\&. These files are listed here:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-1\-0\&.2\&.Data
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-1\&.2\&.ctl
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-1\&.2\&.log
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-1\-0\&.6\&.Data
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-1\&.6\&.ctl
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-1\&.6\&.log
.RE
.sp
Then copy the backup files from nodes 4 and 8 to node 5; these files are shown in the following list:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-1\-0\&.4\&.Data
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-1\&.4\&.ctl
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-1\&.4\&.log
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-1\-0\&.8\&.Data
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-1\&.8\&.ctl
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-1\&.8\&.log
.RE
.sp
For the remainder of this example, we assume that the respective backup files have been saved to the directory
/BACKUP\-1
on each of nodes 3 and 5\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 6.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 6." 4.2
.\}
On each of the two target data nodes, you must restore from both sets of backups\&. First, restore the backups from nodes 2 and 6 to node 3 by invoking
\fBndb_restore\fR
on
host3
as shown here:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBndb_restore \-c host20 \fR\fB\fB\-\-nodeid=2\fR\fR\fB \fR\fB\fB\-\-backupid=1\fR\fR\fB \fR\fB\fB\-\-restore_data\fR\fR\fB \fR\fB\fB\-\-backup_path=/BACKUP\-1\fR\fR
shell> \fBndb_restore \-c host20 \-\-nodeid=4 \-\-backupid=1 \-\-restore_data \-\-backup_path=/BACKUP\-1\fR
.fi
.if n \{\
.RE
.\}
.sp
Then restore the backups from nodes 4 and 8 to node 5 by invoking
\fBndb_restore\fR
on
host5, like this:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBndb_restore \-c host20 \-\-nodeid=6 \-\-backupid=1 \-\-restore_data \-\-backup_path=/BACKUP\-1\fR
shell> \fBndb_restore \-c host20 \-\-nodeid=8 \-\-backupid=1 \-\-restore_data \-\-backup_path=/BACKUP\-1\fR
.fi
.if n \{\
.RE
.\}
.RE
.RE
.sp
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBRestoring to More Nodes Than the Original\fR
.RS 4
.PP
The node ID specified for a given
\fBndb_restore\fR
command is that of the node in the original backup and not that of the data node to restore it to\&. When performing a backup using the method described in this section,
\fBndb_restore\fR
connects to the management server and obtains a list of data nodes in the cluster the backup is being restored to\&. The restored data is distributed accordingly, so that the number of nodes in the target cluster does not need to be to be known or calculated when performing the backup\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBNote\fR
.ps -1
.br
.PP
When changing the total number of LCP threads or LQH threads per node group, you should recreate the schema from backup created using
\fBmysqldump\fR\&.
.sp .5v
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 1.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 1." 4.2
.\}
\fICreate the backup of the data\fR\&. You can do this by invoking the
\fBndb_mgm\fR
client
START BACKUP
command from the system shell, like this:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBndb_mgm \-e "START BACKUP 1"\fR
.fi
.if n \{\
.RE
.\}
.sp
This assumes that the desired backup ID is 1\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 2.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 2." 4.2
.\}
Create a backup of the schema (see also below):
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysqldump \-\-no\-data \-\-routines \-\-events \-\-triggers \-\-databases > myschema\&.sql\fR
.fi
.if n \{\
.RE
.\}
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBImportant\fR
.ps -1
.br
You must not make any schema changes between the first and second steps\&.
.sp .5v
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 3.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 3." 4.2
.\}
Copy the backup directories from above to the new cluster\&. For example if the backup you want to restore is has ID 1 and
BackupDataDir
=
/backups/node_\fInodeid\fR, then the path to the backup on this node is
/backups/node_1/BACKUP/BACKUP\-1\&. Inside this directory there are three files, listed here:
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-1\-0\&.1\&.Data
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-1\&.1\&.ctl
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
BACKUP\-1\&.1\&.log
.RE
.sp
You should copy the entire directory to the new node\&.
.RE
.PP
There is no requirement for the backup to be restored from a specific node or nodes\&.
.PP
To restore from the backup just created, perform the following steps:
.sp
.RS 4
.ie n \{\
\h'-04' 1.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 1." 4.2
.\}
\fIRestore the schema\fR\&. Import the schema file using the
\fBmysql\fR
client, as shown here:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysql < myschema\&.sql\fR
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 2.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 2." 4.2
.\}
\fIRestore the data\fR\&. The following commands can be run in parallel:
.sp
.if n \{\
.RS 4
.\}
.nf
ndb_restore \-\-nodeid=1 \-\-backupid=1 \-\-restore_data \-\-backup_path=/backups/node_1/BACKUP/BACKUP\-1 \-\-disable\-indexes
ndb_restore \-\-nodeid=2 \-\-backupid=1 \-\-restore_data \-\-backup_path=/backups/node_2/BACKUP/BACKUP\-1 \-\-disable\-indexes
ndb_restore \-\-nodeid=3 \-\-backupid=1 \-\-restore_data \-\-backup_path=/backups/node_3/BACKUP/BACKUP\-1 \-\-disable\-indexes
ndb_restore \-\-nodeid=4 \-\-backupid=1 \-\-restore_data \-\-backup_path=/backups/node_4/BACKUP/BACKUP\-1 \-\-disable\-indexes
ndb_restore \-\-nodeid=5 \-\-backupid=1 \-\-restore_data \-\-backup_path=/backups/node_5/BACKUP/BACKUP\-1 \-\-disable\-indexes
ndb_restore \-\-nodeid=6 \-\-backupid=1 \-\-restore_data \-\-backup_path=/backups/node_6/BACKUP/BACKUP\-1 \-\-disable\-indexes
ndb_restore \-\-nodeid=7 \-\-backupid=1 \-\-restore_data \-\-backup_path=/backups/node_7/BACKUP/BACKUP\-1 \-\-disable\-indexes
ndb_restore \-\-nodeid=8 \-\-backupid=1 \-\-restore_data \-\-backup_path=/backups/node_8/BACKUP/BACKUP\-1 \-\-disable\-indexes
.fi
.if n \{\
.RE
.\}
.sp
Add the
\fB\-\-ndb\-connectstring\fR
option as needed\&.
.sp
If you in 3\&. for example copied the backups from the
\(lqold\(rq
nodes having node IDs 1 and 2 to a
\(lqnew\(rq
node whose node ID is 1, you should perform the two invocations of
\fBndb_restore\fR
with
\fB\-\-nodeid=1\fR
and
\fB\-\-nodeid=2\fR
on the new node that has 1 as its node ID\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 3.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 3." 4.2
.\}
\fIRebuild the indexes\fR\&. These were disabled by the
\fB\-\-disable\-indexes\fR
option used in the commands just shown\&. Recreating the indexes avoids errors due to the restore not being consistent at all points\&. Rebuilding the indexes can also improve performance in some cases\&. To rebuild the indexes, execute the following command once, on a single node:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBndb_restore \-\-nodeid=1 \-\-backupid=1 \-\-backup_path=/backups/node_1/BACKUP/BACKUP\-1 \-\-rebuild\-indexes\fR
.fi
.if n \{\
.RE
.\}
.RE
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBImportant\fR
.ps -1
.br
.PP
You should be aware that the supported number of partitions in each table depends on the number of data nodes, node groups, and LDM threads in the cluster\&. Other conditions (such as the values of
MaxNoOfExecutionThreads,
ThreadConfig,
NoOfReplicas, and so on) being the same, a cluster with (for example) two data nodes supports fewer partitions than a cluster with eight data nodes supports\&. This means that using
\fBndb_restore\fR
\fB\-\-restore_meta\fR
to restore the schema does not always work since this restores a given table with the same number of partitions as in the original; it is safer to restore the schema from a backup written by
\fBmysqldump\fR\(emas in the example shown previously\(emwhen restoring to a cluster having fewer data nodes, LDM threads, or both, than were used in the original cluster\&.
.PP
The support for fewer partitions when restoring to a smaller cluster also means the maximum number of rows per table is lower\&. However, with the larger hash maps available in MySQL Cluster 7\&.2\&.9 and later (used by default for new tables), this is not likely to be an issue\&.
.sp .5v
.RE
.RE
.SH "COPYRIGHT"
.br
.PP
Copyright \(co 1997, 2018, Oracle and/or its affiliates. All rights reserved.
.PP
This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License.
.PP
This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
.PP
You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.
.sp
.SH "SEE ALSO"
For more information, please refer to the MySQL Reference Manual,
which may already be installed locally and which is also available
online at http://dev.mysql.com/doc/.
.SH AUTHOR
Oracle Corporation (http://dev.mysql.com/).
Mini Shell