From: Nikolas Everett <nik9000@gmail.com>
To: pgsql-performance@postgresql.org
Subject: SAN and full_page_writes
Date: Wed, 3 Sep 2008 12:03:45 -0400
Message-ID: <d4e11e980809030903q4e14cf59v291b18e7091e18f6@mail.gmail.com> (raw)
I have the honor to be configuring Postgres to back into a NetApp FAS3020
via fiber.
Does anyone know if the SAN protects me from breakage due to partial page
writes?
If anyone has an SAN specific postgres knowledge, I'd love to hear your
words of wisdom.
For reference:
[postgres@localhost bonnie]$ ~neverett/bonnie++-1.03a/bonnie++
Writing with putc()...done
Writing intelligently...done
Rewriting...done
Reading with getc()...done
Reading intelligently...done
start 'em...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
Version 1.03 ------Sequential Output------ --Sequential Input-
--Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec
%CP
localhost.lo 32104M 81299 94 149848 30 42747 8 45465 61 55528 4
495.5 0
------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec
%CP
16 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++
+++
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To: pgsql-performance@postgresql.org
Cc: nik9000@gmail.com
Subject: Re: SAN and full_page_writes
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