drizzledump Backup Tool

Synopsis

drizzledump [OPTIONS] database [tables]

drizzledump [OPTIONS] --databases DB1 [DB2 DB3…]

drizzledump [OPTIONS] --all-databases

Description

drizzledump is used for backing up and restoring logical backups of a Drizzle database, as well as for migrating from a more traditional MySQL server.

When connecting to a Drizzle server it will do a plain dump of the server. When connecting to a MySQL server, it will automatically detect this, and will convert the dump of the tables and data into a Drizzle compatible format.

Any binary data in tables will be converted into hexadecimal output so that it does not corrupt the dump file.

drizzledump Options

The drizzledump tool has several available options:

--all-databases, -A

Dumps all databases found on the server apart from information_schema and data_dictionary in Drizzle and information_schema, performance_schema and mysql in MySQL.

--force, -f

Continue even if a sql-error is received.

--help, -?

Show a message with all the available options.

--lock-all-tables, -x

Locks all the tables for all databases with a global read lock. The lock is released automatically when drizzledump ends. Also turns on --single-transaction.

--single-transaction

Creates a consistent snapshot by dumping the tables in a single transaction. During the snapshot no other connected client should use any of the following as this will implicitly commit the transaction and prevent the consistency:

ALTER TABLE
DROP TABLE
RENAME TABLE
TRUNCATE TABLE

Only works with InnoDB.

--skip-opt

A shortcut for --skip-drop-table, --skip-create, --skip-extended-insert and --skip-disable-keys

--tables t1 t2 ...

Dump a list of tables.

--skip-drop-table

Do not add a ‘drop table’ before each create.

--show-progress-size rows (=10000)

Show progress of the dump every rows of the dump. Requires --verbose

--verbose, -v

Sends various verbose information to stderr as the dump progresses.

--skip-extended-insert

Dump every row on an individual line. For example:

     INSERT INTO `t1` VALUES (1,'hello');
     INSERT INTO `t1` VALUES (2,'world');

This is useful for calculating and storing diffs of dump files.

--skip-dump-date

Do not display the date/time at the end of the dump.

--no-defaults

Do not attempt to read configuration from configuration files.

--add-drop-database

Add DROP DATABASE statements before CREATE DATABASE.

--compact

Gives a more compact output by disabling header/footer comments and enabling --skip-disable-keys.

--databases, -B

Dump several databases. The databases do not need to follow on after this option, they can be anywhere in the command line.

--skip-disable-keys, -K

Do not dump the statements ALTER TABLE ... DISABLE KEYS and ALTER TABLE ... ENABLE KEYS

--ignore-table table

Do not dump specified table, needs to be in the format database.table. Can be specified multiple times for multiple tables.

--insert-ignore

Add the IGNORE keyword into every INSERT statement.

--no-autocommit

Make the dump of each table a single transaction by wrapping it in COMMIT statements.

--no-create-db, -n

Do not dump the CREATE DATABASE statements when using --all-databases or --databases.

--skip-create, -t

Do not dump the CREATE TABLE statements.

--no-data, -d

Do not dump the data itself. Used to dump the schemas only.

--replace

Use REPLACE INTO statements instead of INSERT INTO

--destination-type type (=stdout)

Destination of the data.

stdout The default. Output to the command line

database Connect to another database and pipe data to that.

Added in version Drizzle7: 2010-09-27

--destination-host hostname (=localhost)

The hostname for the destination database. Requires --destination-type = database

Added in version Drizzle7: 2010-09-27

--destination-port port (=3306)

The port number for the destination database. Requires --destination-type = database

Added in version Drizzle7: 2010-09-27

--destination-user username

The username for the destinations database. Requires --destination-type = database

Added in version Drizzle7: 2010-09-27

--destination-password password

The password for the destination database. Requires --destination-type = database

Added in version Drizzle7: 2010-09-27

--destination-database database

The database for the destination database, for use when only dumping a single database. Requires --destination-type = database

Added in version Drizzle7: 2010-09-27

--my-data-is-mangled

If your data is UTF8 but has been stored in a latin1 table using a latin1 connection then corruption is likely and drizzledump by default will retrieve mangled data. This is because MySQL will convert the data to UTF8 on the way out to drizzledump and you effectively get a double-conversion to UTF8.

This typically happens with PHP apps that do not use SET NAMES.

In these cases setting this option will retrieve the data as you see it in your application.

Added in version Drizzle7: 2011-01-31

--host, -h hostname (=localhost)

The hostname of the database server.

--user, -u username

The username for the database server.

--password, -P password

The password for the database server.

--port, -p port (=4427)

The port number of the database server.

--protocol protocol (=mysql)

The protocol to use when connecting to the database server. Options are:

mysql The standard MySQL protocol.

drizzle The Drizzle protocol.

Backups Using drizzledump

Backups of a database can be made very simply by running the following:

$ drizzledump --all-databases > dumpfile.sql

This can then be re-imported into drizzle at a later date using:

$ drizzle < dumpfile.sql

MySQL Migration Using drizzledump

As of version 2010-09-27 there is the capability to migrate databases from MySQL to Drizzle using drizzledump.

drizzledump will automatically detect whether it is talking to a MySQL or Drizzle database server. If it is connected to a MySQL server it will automatically convert all the structures and data into a Drizzle compatible format.

Warning

drizzledump will by default try to connect via. port 4427 so to connect to a MySQL server a port (such as 3306) must be specified.

So, simply connecting to a MySQL server with drizzledump as follows will give you a Drizzle compatible output:

$ drizzledump --all-databases --host=mysql-host --port=3306 --user=mysql-user --password > dumpfile.sql

Additionally drizzledump can now dump from MySQL and import directly into a Drizzle server as follows:

$ drizzledump --all-databases --host=mysql-host --port=3306 --user=mysql-user --password --destination-type=database --desination-host=drizzle-host

Note

Please take special note of Old Password if you have connection issues from drizzledump to your MySQL server.

Note

If you find your VARCHAR and TEXT data does not look correct in a drizzledump output, it is likely that you have UTF8 data stored in a non-UTF8 table. In which case please check the --my-data-is-mangled option.

When you migrate from MySQL to Drizzle, the following conversions are required:

• MyISAM -> InnoDB

• FullText -> drop it (with stderr warning)

• int unsigned -> bigint

• tinyint -> int

• smallint -> int

• mediumint -> int

• tinytext -> text

• mediumtext -> text

• longtext -> text

• tinyblob -> blob

• mediumblob -> blob

• longblob -> blob

• year -> int

• set -> text [1]

• date/datetime default 0000-00-00 -> default NULL [2]

• date/datetime NOT NULL columns -> NULL [2]

• any date data containing 0000-00-00 -> NULL [2]

• time -> int of the number of seconds [3]

• enum-> DEFAULT NULL [4]

Footnotes

[1]

There is currently no good alternative to SET, this is simply to preserve the data in the column. There is a new alternative to SET to be included at a later date.

[2] (1,2,3)

Currently, ALL date columns have their DEFAULT set to NULL on migration. This is so that any rows with 0000-00-00 dates can convert to NULL.

[3]

This prevents data loss since MySQL’s TIME data type has a range of -838:59:59 - 838:59:59, and Drizzle’s TIME type has a range of 00:00:00 - 23:59:59.

[4]

This is so that empty entries such as ‘’ will convert to NULL.