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Re: db recovery after raid5 failure

From: "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov>
To: <b_ki(at)hotmail(dot)com>,<pgsql-admin(at)postgresql(dot)org>, <qcor(at)vp(dot)pl>
Subject: Re: db recovery after raid5 failure
Date: 2010-06-23 11:50:28
Message-ID: 4C21AEB40200002500032865@gw.wicourts.gov (view raw or flat)
Thread:
Lists: pgsql-admin
Balkrishna Sharma  wrote:
 
>> average about two drive failures a month
 
> You must be having a real huge postgres setup with several hundreds
> of drives to have such high frequency of failure.
 
About 100 database servers with over 1000 drives spinning 24/7.  Also
probably significant, management-set policy is to replace machines
after four years, and we don't always hit that.  I haven't tried to
run numbers on it, but the pattern sure seems to match published
reports that we have some initial failures within the first few
months when a set of machines go in, it settles down for about three
years, then the failure rate starts to edge inexorably upward.
 
>> As a place to put "one more copy" it might make sense, as long as
>> it had strong encryption.
 
> I didn't expand but that's what I meant. The copy in cloud to be
> your final resort incase the LAN and the WAN copy both fail. You
> get an extra copy in a different geographic location for some
> catastrophic event.
 
OK, that makes sense.
 
-Kevin



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