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Scale Fail (part 2)Scale Fail (part 2)Posted May 21, 2011 3:30 UTC (Sat) by kjp (subscriber, #39639)Parent article: Scale Fail (part 2)
Ironic, but our single point of failure is postgres. I really don't want to have to move to cassandra. But I also don't want to be paged in the middle of the night if an ec2 datacenter goes down.
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Scale Fail (part 2) Posted May 21, 2011 14:38 UTC (Sat) by jberkus (guest, #55561) [Link]
There are things you can do about that. HA solutions exist ...
Scale Fail (part 2) Posted May 23, 2011 21:51 UTC (Mon) by kjp (subscriber, #39639) [Link]
Nothing there is as attractive as a simple (self healing) quorum system that works over encrypted WAN links. No quorum = down. Else, it works. We have no STONITH, we have no redundant network links. Thus the typical stuff that seems to be used (DRBD) and even the future postgres stuff (postgres r and xc) do not appear like strong candidates.
Scale Fail (part 2) Posted May 23, 2011 21:56 UTC (Mon) by dlang (✭ supporter ✭, #313) [Link]
you would use the quorum system to control the DRBD of postgres stuff.
this is available today with the linux-ha project.
Scale Fail (part 2) Posted May 24, 2011 13:58 UTC (Tue) by kjp (subscriber, #39639) [Link]
Thanks. The quorum server looks promising.
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