--- name: "drizzledump" section: "1" platform: "linux" package: "drizzle-client" version: "1:7.1.36-stable-1" release: "Debian 7 (Wheezy)" platforms: ["linux"] url: "https://new.carta.tech/drizzledump" --- # drizzledump(1) a database backup program ## NAME drizzledump - a database backup program ## 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. New in version Drizzle7: 2010-09-27 - **--destination-host hostname (=localhost)** The hostname for the destination database. Requires *--destination-type* *= database* New in version Drizzle7: 2010-09-27 - **--destination-port port (=3306)** The port number for the destination database. Requires *--destination-type* *= database* New in version Drizzle7: 2010-09-27 - **--destination-user username** The username for the destinations database. Requires *--destination-type* *= database* New in version Drizzle7: 2010-09-27 - **--destination-password password** The password for the destination database. Requires *--destination-type* *= database* New 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* New 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. New 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-passwords-label* 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. - \[2\] 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. ## AUTHOR Andrew Hutchings ## COPYRIGHT 2010, Drizzle Developers