On Thu, Jun 11, 2009 at 5:25 PM, DaB.
<WP@daniel.baur4.info> wrote:
Hello all,
yesterday at highnoon the master-db-servers were switched because of an huge
schema-update. Because we have only one cluster of db-servers at the moment we
couldn't do the schema-update the same way like the foundation (the foundation
stops one of their slaves, does the schema-update, waits, start it again,
stops another slave, does the schema-update and so on until all slaves are
updated, and declare one slave as new master, runs the schema-update on the
old master = no downtime) and so it took several hours until the schema-update
was done and we could switch to the new master-servers.
I deleted the view on the logging-table during the update to speed the update
up and killed several long-running queries too tonight.
The update was finish before I wake-uped, and I just finished the
masterswitch, restarted replication and recreated the logging-tables (see
maintaince-log for details). So in a few hours everything should be normal
again.
Happy Corpus Christi (it's an holiday here :)).
Sincerly,
DaB.
--
wp-blog.de
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