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MYSQLHOTCOPY

NAME

SYNOPSIS

  mysqlhotcopy db_name

  mysqlhotcopy --suffix=_copy db_name_1 ... db_name_n

  mysqlhotcopy db_name_1 ... db_name_n /path/to/new_directory

  mysqlhotcopy db_name./regex/

  mysqlhotcopy db_name./^\(foo\|bar\)/

  mysqlhotcopy db_name./~regex/

  mysqlhotcopy db_name_1./regex_1/ db_name_1./regex_2/ ... db_name_n./regex_n/ /path/to/new_directory

  mysqlhotcopy --method='scp -Bq -i /usr/home/foo/.ssh/identity' --user=root --password=secretpassword \
         db_1./^nice_table/ user@some.system.dom:~/path/to/new_directory

DESCRIPTION

Here ``live'' means that the database server is running and the database may be in active use. And ``stable'' means that the copy will not have any corruptions that could occur if the table files were simply copied without first being locked and flushed from within the server.  

OPTIONS

--checkpoint checkpoint-table

As each database is copied, an entry is written to the specified checkpoint-table. This has the happy side-effect of updating the MySQL update-log (if it is switched on) giving a good indication of where roll-forward should begin for backup+rollforward schemes.

The name of the checkpoint table should be supplied in database.table format. The checkpoint-table must contain at least the following fields:

  time_stamp timestamp not null
  src varchar(32)
  dest varchar(60)
  msg varchar(255)

--record_log_pos log-pos-table

Just before the database files are copied, update the record in the log-pos-table from the values returned from ``show master status'' and ``show slave status''. The master status values are stored in the log_file and log_pos columns, and establish the position in the binary logs that any slaves of this host should adopt if initialised from this dump. The slave status values are stored in master_host, master_log_file, and master_log_pos, and these are useful if the host performing the dump is a slave and other sibling slaves are to be initialised from this dump.

The name of the log-pos table should be supplied in database.table format. A sample log-pos table definition:

CREATE TABLE log_pos (
  host            varchar(60) NOT null,
  time_stamp      timestamp(14) NOT NULL,
  log_file        varchar(32) default NULL,
  log_pos         int(11)     default NULL,
  master_host     varchar(60) NULL,
  master_log_file varchar(32) NULL,
  master_log_pos  int NULL,

  PRIMARY KEY  (host) 
);

--suffix suffix

Each database is copied back into the originating datadir under a new name. The new name is the original name with the suffix appended.

If only a single db_name is supplied and the --suffix flag is not supplied, then ``--suffix=_copy'' is assumed.

--allowold

Move any existing version of the destination to a backup directory for the duration of the copy. If the copy successfully completes, the backup directory is deleted - unless the --keepold flag is set. If the copy fails, the backup directory is restored.

The backup directory name is the original name with ``_old'' appended. Any existing versions of the backup directory are deleted.

--keepold

Behaves as for the --allowold, with the additional feature of keeping the backup directory after the copy successfully completes.

--flushlog

Rotate the log files by executing ``FLUSH LOGS'' after all tables are locked, and before they are copied.

--resetmaster

Reset the bin-log by executing ``RESET MASTER'' after all tables are locked, and before they are copied. Usefull if you are recovering a slave in a replication setup.

--resetslave

Reset the master.info by executing ``RESET SLAVE'' after all tables are locked, and before they are copied. Usefull if you are recovering a server in a mutual replication setup.

--regexp pattern

Copy all databases with names matching the pattern

db_name./pattern/

Copy only tables matching pattern. Shell metacharacters ( (, ), |, !, etc.) have to be escaped (e.g. \). For example, to select all tables in database db1 whose names begin with 'foo' or 'bar':

    mysqlhotcopy --indices --method=cp db1./^\(foo\|bar\)/

db_name./~pattern/

Copy only tables not matching pattern. For example, to copy tables that do not begin with foo nor bar:

    mysqlhotcopy --indices --method=cp db1./~^\(foo\|bar\)/

-?, --help

Display helpscreen and exit

-u, --user=#

user for database login if not current user

-p, --password=#

password to use when connecting to server

-P, --port=#

port to use when connecting to local server

-S, --socket=#

UNIX domain socket to use when connecting to local server

--noindices

Don\'t include index files in copy. Only up to the first 2048 bytes are copied; You can restore the indexes with isamchk -r or myisamchk -r on the backup.

--method=#

method for copy (only ``cp'' currently supported). Alpha support for ``scp'' was added in November 2000. Your experience with the scp method will vary with your ability to understand how scp works. 'man scp' and 'man ssh' are your friends.

The destination directory _must exist_ on the target machine using the scp method. --keepold and --allowold are meeningless with scp. Liberal use of the --debug option will help you figure out what\'s really going on when you do an scp.

Note that using scp will lock your tables for a _long_ time unless your network connection is _fast_. If this is unacceptable to you, use the 'cp' method to copy the tables to some temporary area and then scp or rsync the files at your leisure.

-q, --quiet

be silent except for errors

--debug

Debug messages are displayed

-n, --dryrun

Display commands without actually doing them

WARRANTY

Patches adding bug fixes, documentation and new features are welcome. Please send these to internals@lists.mysql.com.  

TO DO

  mysqlhotcopy db newdb  t1 t2 /^foo_/ : t3 /^bar_/ : +

newdb is either another not existing database or a full path to a directory where we can create a directory 'db'

Add option to lock each table in turn for people who don\'t need cross-table integrity.

Add option to FLUSH STATUS just before UNLOCK TABLES.

Add support for other copy methods (eg tar to single file?).

Add support for forthcoming MySQL ``RAID'' table subdirectory layouts.  

AUTHOR

Martin Waite - added checkpoint, flushlog, regexp and dryrun options
               Fixed cleanup of targets when hotcopy fails.           Added --record_log_pos.

               RAID tables are now copied (don't know if this works over scp).

Ralph Corderoy - added synonyms for commands

Scott Wiersdorf - added table regex and scp support

Monty - working --noindex (copy only first 2048 bytes of index file)
        Fixes for --method=scp

Ask Bjoern Hansen - Cleanup code to fix a few bugs and enable -w again.

Emil S. Hansen - Added resetslave and resetmaster.

Jeremy D. Zawodny - Removed depricated DBI calls. Fixed bug which resulted in nothing being copied when a regexp was specified but no database name(s).

Index

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

WARRANTY

TO DO

AUTHOR