mydumper的使用
mydumper是支持多线程工作的mysql逻辑导数工具
安装
yum install -y /mydumper-0.9.5-2.el6.x86_64.rpm
参数
Application Options:
-B, --database Database to dump
-T, --tables-list Comma delimited table list to dump (does not exclude regex option)
-O, --omit-from-file File containing a list of database.table entries to skip, one per line (skips before applying regex option)
-o, --outputdir Directory to output files to
-s, --statement-size Attempted size of INSERT statement in bytes, default 1000000
-r, --rows Try to split tables into chunks of this many rows. This option turns off --chunk-filesize
-F, --chunk-filesize Split tables into chunks of this output file size. This value is in MB
-c, --compress Compress output files
-e, --build-empty-files Build dump files even if no data available from table
-x, --regex Regular expression for 'db.table' matching
-i, --ignore-engines Comma delimited list of storage engines to ignore
-N, --insert-ignore Dump rows with INSERT IGNORE
-m, --no-schemas Do not dump table schemas with the data
-d, --no-data Do not dump table data
-G, --triggers Dump triggers
-E, --events Dump events
-R, --routines Dump stored procedures and functions
-W, --no-views Do not dump VIEWs
-k, --no-locks Do not execute the temporary shared read lock. WARNING: This will cause inconsistent backups
--no-backup-locks Do not use Percona backup locks
--less-locking Minimize locking time on InnoDB tables.
-l, --long-query-guard Set long query timer in seconds, default 60
-K, --kill-long-queries Kill long running queries (instead of aborting)
-D, --daemon Enable daemon mode
-I, --snapshot-interval Interval between each dump snapshot (in minutes), requires --daemon, default 60
-L, --logfile Log file name to use, by default stdout is used
--tz-utc SET TIME_ZONE='+00:00' at top of dump to allow dumping of TIMESTAMP data when a server has data in different time zones or data is being moved between servers with different time zones, defaults to on use --skip-tz-utc to disable.
--skip-tz-utc
--use-savepoints Use savepoints to reduce metadata locking issues, needs SUPER privilege
--success-on-1146 Not increment error count and Warning instead of Critical in case of table doesn't exist
--lock-all-tables Use LOCK TABLE for all, instead of FTWRL
-U, --updated-since Use Update_time to dump only tables updated in the last U days
--trx-consistency-only Transactional consistency only
--complete-insert Use complete INSERT statements that include column names
版本查看
mydumper -V
mydumper 0.9.5, built against MySQL 5.7.21-21
默认用4个线程导数，一般企业服务器建议8以上，非事务引擎会锁表，建议用slave导出，使用压缩
备份全库
mydumper -u root -p 'xxx' -h xxx -o /xxx/gw
备份指定数据库
mydumper -u root -p 'xxx' -h xxx -B gw -t 6 -o /xxx/gw
备份多张表(tableA,tableB)
mydumper -u root -p 'xxx' -h xxx -B gw -T testA,testB -t 6 -o /xxx/gw
备份tableA表的数据，并进行压缩
mydumper -u root -p 'xxx' -h xxx -B gw -T testA -t 6 -c -o /xxx/gw
关闭写入日志到二进制中。主从不会复制
myloader -u root -p 'xxx' -h xxx -B gw -o -t 4 -v 3 -d /xxx/gw/ -S /db/mysql_3306/mysql.sock
开启 -e
myloader -u root -p 'xxx' -h xxx -B gw -o -t 4 -v 3 -e -d /xxx/gw/ -S /db/mysql_3306/mysql.sock
全备，并备份二进制日志文件
mydumper -u root -p 'xxx' -h xxx -o /xxx/gw
备份表，不备份表结构
mydumper -u root -p 'xxx' -h xxx -B gw -T testA -m -o /xxx/gw
指定备份数据库：备份mysql和test库
mydumper -u root -p 'xxx' -h xxx -P 3306 -t 3 -c -l 3600 -s 10000000 -e --regex '^(mysql\.|test\.)' -o /xxx/gw
不备份以test开头的库
--regex '^(?!(test))'