Name
LOAD DATA FROM MASTER
Synopsis
LOAD DATA FROM MASTER
This statement has been deprecated and will be removed from
future releases of MySQL. It never worked very well. It was meant to
make a copy of all the databases on the master server (except the
mysql
database) and copy them to the slave servers.
It gets a global read lock on all tables while it takes a snapshot of
the databases, and releases the lock before copying them to the
slaves. The MASTER_LOG_FILE
and the
MASTER_LOG_POS
variables will be updated so that
the slave knows where to begin logging.
This statement works only with MyISAM tables. The user for the
connection must have RELOAD
,
SELECT
, and SUPER
privileges on
the master server. The user must also have CREATE
and DROP
privileges on the slave server. For large databases, increase the
values of the net_read_timeout
and
net_write_timeout
variables with the
SET
statement. To load a specific table from the
master server, use the LOAD TABLE...FROM MASTER statement.
Again, this statement does not work very well: it’s not
dependable and usually has problems with properly copying data from
the master to the slave. Instead, use a utility such as
mysqldump
to copy the data on the master and then
transfer the resulting file to the slave, as described in detail in
the tutorial section at the start of this chapter.
Get MySQL in a Nutshell, 2nd Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.