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Rebuilding an existing slave from a master using cold-copying of /var/lib/mysql, would this be the proper process/order? Anything missing?

  1. master mysql> SHOW MASTER STATUS\G (take notes)
  2. slave mysql> STOP SLAVE;
  3. Shut down master and slave mysqld
  4. Move existing slave:/var/lib/mysql out of the way
  5. Copy master:/var/lib/mysql to slave:/var/lib/mysql
  6. Start master mysqld
  7. Start slave mysqld
  8. slave mysql> CHANGE MASTER TO MASTER_HOST='masterserver',
    -> MASTER_USER='replicationusername',
    -> MASTER_PASSWORD='replcationpassword',
    -> MASTER_LOG_FILE='logfilefromshowmasterstatus',
    -> MASTER_LOG_POS=positionfromshowmasterstatus;
  9. slave mysql> start slave;
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There will be some time between "SHOW MASTER STATUS" and shutting down mysqld. Might I suggest using "FLUSH TABLES WITH READ LOCK;" then "SHOW MASTER STATUS;" (Take notes). FLUSH tables will make sure all changes are written to disk and with read lock will make sure the database does not change afterward. – racyclist Oct 13 '10 at 21:11
Here are step by step instruction how to do this with minimal downtime using Linux LVM snapshots.… – Juha Vehnia May 20 '15 at 19:07
up vote 0 down vote accepted

I'd suggest referring to a following link:

MySQL MySQL 5.1 Reference Manual 16.1.1 How to Set Up Replication

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Other pieces to add to the mix:

step 6.5 Check permissions after moving files

Step 7 - restart slave with mysqld_safe --skip-slave-start &

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1.- Stop master and slave mysqld.

2.- On slave move /var/lib/mysq/ to someplace else.

3.- Copy /var/lib/mysql from master to slave.

4.- Check permissions on slave.

5.- On slave (/etc/my.cnf) set --skip-slave-start

6.- Start master and slave mysqld

7.- On slave point to the new master binlog file just created, on position 4.

8.- start slave io_thread, then see if everything is okay

9.- start slave sql_thread and wait the slave to get up to date.

That's it.

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