Archive for the ‘Filesystems’ Category

GlusterFS and courier-imap

Sunday, September 25th, 2016

On Friday evening we had a scheduled maintenance power failure in one of our main data-centers. Since we’re running GlusterFS on two servers, replicating between each other, everything is supposed to simply fail over to the other server, and continue on it’s merry way. Everything is configured to be in a redundant configuration. Unfortunately courier-imap seems to be triggering a use-case which GlusterFS cannot properly deal with. (more…)

GlusterFS experiences

Thursday, August 25th, 2016

Recently we’ve had some unexpected bad performance on a few servers that rely on GlusterFS. Specifically our web servers (Apache + PHP portion of our LAMP stack) took quite a beating with more outages than I’d care to admit.
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