A common replication error

2009/01/28 by admin in Replication | Leave a comment

I’ll keep this short. Let’s say you run “mysql> show slave status\G” and you see the following error:

Last_Error: Error 'Unknown or incorrect time zone: 'Etc/UTC'' on query. Default database: 'db_name'. Query: 'INSERT INTO table SET column = CONVERT_TZ('2009-01-24', '-8:00', '+00:00')'

It’s a simple fix. Exit out of MySQL and run the following command – this works on Redhat, I’ve not tried it on other flavors.

shell> mysql_tzinfo_to_sql /usr/share/zoneinfo|mysql -u root -p

Log back into MySQL and run the following.

mysql> stop slave;
mysql> start slave;
mysql> show slave status\G;

The error should be gone and the slave should be catching up to the master now. Problem solved.

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Updated: Monolith Toolkit – MySQL DBA tools 0.4.2

2008/10/14 by admin in Monolith Toolkit | Leave a comment

Updated the release, sure it’s only been a matter of hours but I added the standard cnf files for 2,4,8 and 16GB server installations. Also added the rhcluster-wrapper script that can be used to run just about anything on the active database node when using mysql in an active/passive setup.

Download here:  http://code.google.com/p/monolith-toolkit/

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Monolith Toolkit – MySQL DBA tools released!

2008/10/14 by admin in Monolith Toolkit, Scripts | Leave a comment

Today I decided to package all of my various scripts together into a useful toolkit. Some are perl, some are shell script. These scripts are, in general, one off scripts that I wrote in order to get things done that weren’t available at the time. Now they’re nicely organized and will receive updates at the google code repo.

So far the toolkit includes the following scripts:

  • mt-backup-parallel -> the parallel backup script I wrote about in my last post
  • mt-check-replication -> script to report on replication status for slave servers
  • mt-check-rhcluster-filesystems -> reports on redhat cluster filesystems (for mysql active/passive clustering)
  • mt-connections-log -> logs connections to mysql to disk, reports on threshold overages
  • mt-flush-tables-sequence -> runs through schema.tables to flush in sequence before global flush
  • mt-rotate-logs -> rotates general and slow query logs on periodic basis

To download go here: http://code.google.com/p/monolith-toolkit/

Note: these are not associated (yet) with the main Monolith project that is for monitoring. Although it will be soon :)

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