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I have a VoIP server running 24x7. At low peak hour at lease 150+ users are connected. My server has MySQL running with InnoDB engine on Windows 2008 platform. I like to take at least 2 times full database backup without shutting down my service.

As per Peter Zaitsev - the founder of percona, mysqldump –single-transaction is not always good.

read here if you are interested

As I'm not a DBA, I like to know in my scenario, which would be best solution to take a database backup?

Thanks,

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  • It's possible to configure database replication (master/slave) and then create backup on slave server at any time. – Valery Viktorovsky May 14 '13 at 19:19
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As your link points out, ALTER TABLE can break a transaction

In fact, according to Page 418 Paragraph 3 of MySQL 5.0 Certification Study Guide

sx

the following commands can break a transaction

  • ALTER TABLE
  • BEGIN
  • CREATE INDEX
  • DROP DATABASE
  • DROP INDEX
  • DROP TABLE
  • RENAME TABLE
  • TRUNCATE TABLE
  • LOCK TABLES
  • UNLOCK TABLES
  • SET AUTOCOMMIT = 1
  • START TRANSACTION

Thus, you cannot run any of these and have a stable mysqldump

SUGGESTION

You badly need to create a MySQL Replication setup

That way, the Master and stay up 24/7.

On the Slave, you can do the following:

  • STOP SLAVE;
  • mysqldump --single-transaction
  • START SLAVE;

and never disturb the Master.

CAVEAT

Since setting up Replication requires a stable mysqldump, you may need downtime for the one-time setup. My answer would be a lot different if your MySQL was in Linux.

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  • Hi Rolando, thanks for help. I may manage to get the DB server migrate on Linux. what would you suggest then? Is that a better idea? – level3 Mar 15 '13 at 21:51
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    You could setup replication from Windows to Linux (although it is a little messy). I've done that twice at my job (1st time about 3 years, last time 3 days ago). – RolandoMySQLDBA Mar 15 '13 at 22:23
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    Once you migrate to Linux, setup Circular Replication between two Linux servers and ditch Windows for MySQL. – RolandoMySQLDBA Mar 15 '13 at 22:24
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    88% of survey respondants say they use MySQL on Linux. mysqlperformanceblog.com/2012/11/30/… – Bill Karwin Dec 11 '13 at 5:52
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    One caveat about backing up from a slave: make sure the slave has no data drift. Use pt-table-checksum. – Bill Karwin Dec 11 '13 at 5:54

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