[mythtv-users] Some master/slave backend advise required

Jon Heizer jheizer at gmail.com
Tue Jun 3 00:37:38 UTC 2014


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Your databases are not also on the array are they?  That would be bad news.


Really you have your 2 possible issues.  CPU currently being maxed and the
IO bandwidth.  These are all guesses since this is a serious load but
personally if you wanted them to remain a single machine I'd swap the i5
with an i7 and break the array into at least 2.  Whether trying 2 vdevs in
a raidz or just 2 totally separate raidz since myth can have ad many
individual storage locations as you want. And/or put a SSD ZiL in front of
any raidz configuration.  But if you are really pushing that IO load it
could still be an issue.  Or build a second box and just put 1/2 the
storage and 1/2 the tuners in it as a slave backend if you don't want to
move to an i7.

I'm curious what people that do have this high of a load do if they have
redundant storage.  Maybe just 3 sets of mirrors would be best.
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