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Re: SAN and full_page_writes

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Nikolas Everett <nik9000(at)gmail(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: SAN and full_page_writes
Date: 2008-09-06 19:46:40
Message-ID: 200809061946.m86JkeS01341@momjian.us (view raw or flat)
Thread:
Lists: pgsql-performance
Nikolas Everett wrote:
> I seem to have answered my own question.  I'm sending the answer to the list
> in case someone else has the same question one day.
> 
> According to the NetApp documentation, it does protect me from partial page
> writes.  Thus, full_page_writes = off.

Just for clarification, the NetApp must guarantee that the entire 8k
gets to disk, not just one of the 512-byte blocks that disks use
internally.

-- 
  Bruce Momjian  <bruce(at)momjian(dot)us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + If your life is a hard drive, Christ can be your backup. +

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