From: Greg Smith <gsmith@gregsmith.com>
To: Scott Marlowe <scott.marlowe@gmail.com>
Cc: Stef Telford <stef@ummon.com>
Cc: Mark Kirkwood <markir@paradise.net.nz>
Cc: Scott Carey <scott@richrelevance.com>
Cc: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Subject: Re: Raid 10 chunksize
Date: Wed, 1 Apr 2009 13:49:46 -0400 (EDT)
Message-ID: <alpine.GSO.2.01.0904011344210.2028@westnet.com> (raw)
In-Reply-To: <dcc563d10904010954u582600a9t721fd1a2050a802f@mail.gmail.com>
References: <C5F14970.3CA1%scott@richrelevance.com>
<49D31E85.8050405@paradise.net.nz>
<49D37CAA.6080100@ummon.com>
<alpine.GSO.2.01.0904011144270.23835@westnet.com>
<49D3932D.3080808@ummon.com>
<dcc563d10904010941r283b7536g383c8daa8b933ce7@mail.gmail.com>
<49D39AFA.8000700@ummon.com>
<dcc563d10904010954u582600a9t721fd1a2050a802f@mail.gmail.com>
On Wed, 1 Apr 2009, Scott Marlowe wrote:
> Meteor strike is far less likely than a power surge taking out a UPS.
I average having a system go down during a power outage because the UPS it
was attached to wasn't working right anymore about once every five years.
And I don't usually manage that many systems.
The only real way to know if a UPS is working right is to actually detach
power and confirm the battery still works, which is downtime nobody ever
feels is warranted for a production system. Then, one day the power dies,
the UPS battery doesn't work to spec anymore, and you're done.
Of course, I have a BBC controller in my home desktop, so that gives you
an idea where I'm at as far as paranoia here goes.
--
* Greg Smith gsmith@gregsmith.com http://www.gregsmith.com Baltimore, MD
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To: pgsql-performance@postgresql.org
Cc: gsmith@gregsmith.com, scott.marlowe@gmail.com, stef@ummon.com, markir@paradise.net.nz, scott@richrelevance.com
Subject: Re: Raid 10 chunksize
In-Reply-To: <alpine.GSO.2.01.0904011344210.2028@westnet.com>
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