mariadb-hotcopy
mariadb-hotcopy is a Perl script that was originally written and contributed by Tim Bunce. It uses FLUSH TABLES, LOCK TABLES, and cp or scp to make a database backup.
Prior to MariaDB 10.5, the client was called mysqlhotcopy. It can still be accessed under this name, via a symlink in Linux, or an alternate binary in Windows.
It is a fast way to make a backup of the database or single tables, but it can be run only on the same machine where the database
directories are located. mariadb-hotcopy> works only for backing up MyISAM and ARCHIVE tables. It runs on Unix and NetWare.
To use mariadb-hotcopy, you must have read access to the files
for the tables that you are backing up, the SELECT privilege for
those tables, the RELOAD privilege (to be able to execute FLUSH TABLES), and
the LOCK TABLES privilege (to be able to lock the tables).
shell> mariadb-hotcopy db_name [/path/to/new_directory] shell> mariadb-hotcopy db_name_1 ... db_name_n /path/to/new_directory
Back up tables in the given database that match a regular expression:
shell> mariadb-hotcopy db_name./regex/
The regular expression for the table name can be negated by prefixing it with a
tilde (“~”):
shell> mariadb-hotcopy db_name./~regex/
mariadb-hotcopy supports the following options, which can be
specified on the command line or in the [mariadb-hotcopy] and
[client] option file groups.
| Option | Description |
|---|---|
--help, -? | Display a help message and exit. |
--addtodest | Do not rename target directory (if it exists); merely add files to it. |
--allowold | Do not abort if a target exists; rename it by adding an _old suffix. |
--checkpoint=db_name.tbl_name | Insert checkpoint entries into the specified database db_name and table tbl_name. |
--chroot=path | Base directory of the chroot jail in which mariadbd operates. The path value should match that of the --chroot option given to mariadbd. |
--debug | Enable debug output. |
--dryrun, -n | Report actions without performing them. |
--flushlog | Flush logs after all tables are locked. |
--host=host_name, -h host_name | The host name of the local host to use for making a TCP/IP connection to the local server. By default, the connection is made to localhost using a Unix socket file. |
--keepold | Do not delete previous (renamed) target when done. |
--method=command | The method for copying files (cp or scp). The default is cp. |
--noindices | Do not include full index files for MyISAM tables in the backup. This makes the backup smaller and faster. The indexes for reloaded tables can be reconstructed later with myisamchk -rq. |
--old-server | Connect to old MySQL-server (before v5.5) which doesn't have FLUSH TABLES WITH READ LOCK fully implemented. |
--password=password, -ppassword | The password to use when connecting to the server. The password value is not optional for this option, unlike for other MariaDB programs. Specifying a password on the command line should be considered insecure. You can use an option file to avoid giving the password on the command line. |
--port=port_num, -P port_num | The TCP/IP port number to use when connecting to the local server. |
--quiet, -q | Be silent except for errors. |
--record_log_pos=db_name.tbl_name | Record master and slave status in the specified database db_name and table tbl_name. |
--regexp=expr | Copy all databases with names that match the given regular expression. |
--resetmaster | Reset the binary log after locking all the tables. |
--resetslave | Reset the master.info file after locking all the tables. |
--socket=path, -S path | The Unix socket file to use for connections to localhost. |
--suffix=str | The suffix to use for names of copied databases. |
--tmpdir=path | The temporary directory. The default is /tmp. |
--user=username, -u username | The MariaDB username to use when connecting to the server. |
Use perldoc for additional mariadb-hotcopy documentation,
including information about the structure of the tables needed for the
--checkpoint and --record_log_pos options:
shell> perldoc mariadb-hotcopy
