常用参数
–opt
–opt --events
如果运行mysqldump没有–quick或–opt选项，mysqldump在转储结果前将整个结果集装入内存。如果转储大数据库可能会出现问题。该选项默认启用，但可以用–skip-opt禁用。
如果使用最新版本的mysqldump程序生成一个转储重装到很旧版本的MySQL服务器中，不应使用–opt或-e选项。
–single-transaction
–single-transaction
Creates a consistent snapshot by dumping all tables in a single transaction. Works ONLY for tables stored in storage engines which support multiversioning (currently only InnoDB does); the dump is NOT guaranteed to be consistent for other storage engines. While a --single-transaction dump is in process, to ensure a valid dump file (correct table contents and binary log position), no other connection should use the following statements: ALTER TABLE, DROP TABLE, RENAME TABLE, TRUNCATE TABLE, as consistent snapshot is not isolated from them. Option automatically turns off --lock-tables.
–single-transaction
Creates a consistent snapshot by dumping all tables in a
single transaction. Works ONLY for tables stored in
storage engines which support multiversioning (currently
only InnoDB does); the dump is NOT guaranteed to be
consistent for other storage engines. While a
–single-transaction dump is in process, to ensure a
valid dump file (correct table contents and binary log
position), no other connection should use the following
statements: ALTER TABLE, DROP TABLE, RENAME TABLE,
TRUNCATE TABLE, as consistent snapshot is not isolated
from them. Option automatically turns off --lock-tables.
–set-gtid-purged
–set-gtid-purged[=name]
Add ‘SET @@GLOBAL.GTID_PURGED’ to the output. Possible
values for this option are ON, OFF and AUTO. If ON is
used and GTIDs are not enabled on the server, an error is
generated. If OFF is used, this option does nothing. If
AUTO is used and GTIDs are enabled on the server, ‘SET
@@GLOBAL.GTID_PURGED’ is added to the output. If GTIDs
are disabled, AUTO does nothing. If no value is supplied
then the default (AUTO) value will be considered.
–master-data
–master-data[=#] This causes the binary log position and filename to be
appended to the output. If equal to 1, will print it as a
CHANGE MASTER command; if equal to 2, that command will
be prefixed with a comment symbol. This option will turn
–lock-all-tables on, unless --single-transaction is
specified too (on servers that don’t provide
Binlog_snapshot_file and Binlog_snapshot_position status
variables this will still take a global read lock for a
short time at the beginning of the dump; don’t forget to
read about --single-transaction below). In all cases, any
action on logs will happen at the exact moment of the
dump. Option automatically turns --lock-tables off.
