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13.6.2.2 `LOAD DATA FROM MASTER' Syntax
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LOAD DATA FROM MASTER
This statement takes a snapshot of the master and copies it to the
slave. It updates the values of `MASTER_LOG_FILE' and `MASTER_LOG_POS'
so that the slave starts replicating from the correct position. Any
table and database exclusion rules specified with the -replicate-*-do-*
and -replicate-*-ignore-* options are honored. -replicate-rewrite-db is
_not_ taken into account because a user could use this option to set up
a non-unique mapping such as -replicate-rewrite-db="db1->db3" and
-replicate-rewrite-db="db2->db3", which would confuse the slave when
loading tables from the master.
Use of this statement is subject to the following conditions:
* It works only for `MyISAM' tables. Attempting to load a
non-`MyISAM' table results in the following error:
ERROR 1189 (08S01): Net error reading from master
* It acquires a global read lock on the master while taking the
snapshot, which prevents updates on the master during the load
operation.
If you are loading large tables, you might have to increase the values
of `net_read_timeout' and `net_write_timeout' on both the master and
slave servers. See server-system-variables.
Note that `LOAD DATA FROM MASTER' does _not_ copy any tables from the
`mysql' database. This makes it easy to have different users and
privileges on the master and the slave.
To use `LOAD DATA FROM MASTER', the replication account that is used to
connect to the master must have the `RELOAD' and `SUPER' privileges on
the master and the `SELECT' privilege for all master tables you want to
load. All master tables for which the user does not have the `SELECT'
privilege are ignored by `LOAD DATA FROM MASTER'. This is because the
master hides them from the user: `LOAD DATA FROM MASTER' calls `SHOW
DATABASES' to know the master databases to load, but `SHOW DATABASES'
returns only databases for which the user has some privilege. See
show-databases. On the slave side, the user that issues `LOAD DATA
FROM MASTER' must have privileges for dropping and creating the
databases and tables that are copied.
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