pg.ddx.io  pgsql-performance@postgresql.org mailing list archive  

help / color / mirror / Atom feed
From: Scott Marlowe <scott.marlowe@gmail.com>
To: Kevin Grittner <Kevin.Grittner@wicourts.gov>
Cc: Scott Carey <scott@richrelevance.com>
Cc: jd@commandprompt.com
Cc: pgsql-performance@postgresql.org
Subject: Re: Create and drop temp table in 8.3.4
Date: Thu, 6 Nov 2008 15:45:57 -0700
Message-ID: <dcc563d10811061445h32c5ad72o84f367d7cc3c6899@mail.gmail.com> (raw)
In-Reply-To: <49131C67.EE98.0025.0@wicourts.gov>
References: <4911957A.EE98.0025.0@wicourts.gov>
	<4911D4DB.EE98.0025.0@wicourts.gov>
	<4912EAFF.EE98.0025.0@wicourts.gov>
	<1225999071.1204.14.camel@jd-laptop.pragmaticzealot.org>
	<4912F29E.EE98.0025.0@wicourts.gov>
	<a1ec7d000811061305n7b28800od469c1411e1a9928@mail.gmail.com>
	<dcc563d10811061405l76cb59adh58741b227fe9d8a6@mail.gmail.com>
	<49131C67.EE98.0025.0@wicourts.gov>

On Thu, Nov 6, 2008 at 3:33 PM, Kevin Grittner
<Kevin.Grittner@wicourts.gov> wrote:
>>>> "Scott Marlowe" <scott.marlowe@gmail.com> wrote:
>> I am pretty sure that with no write barriers that even a BBU
> hardware
>> caching raid controller cannot guarantee your data.
>
> That seems at odds with this:
>
> http://oss.sgi.com/projects/xfs/faq.html#wcache_persistent
>
> What evidence to you have that the SGI XFS team is wrong?

Logic?  Without write barriers in my file system an fsync request will
be immediately returned true, correct?  That means that writes can
happen out of order, and a system crash could corrupt the file system.
 Just seems kind of obvious to me.



view thread (17+ messages)  latest in thread

Message-ID: <dcc563d10811061445h32c5ad72o84f367d7cc3c6899@mail.gmail.com>
Permalink:  ../dcc563d10811061445h32c5ad72o84f367d7cc3c6899@mail.gmail.com/
Also on:    postgresql.org/message-id/dcc563d10811061445h32c5ad72o84f367d7cc3c6899@mail.gmail.com

 · 

reply
Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: pgsql-performance@postgresql.org
  Cc: scott.marlowe@gmail.com, Kevin.Grittner@wicourts.gov, scott@richrelevance.com, jd@commandprompt.com
  Subject: Re: Create and drop temp table in 8.3.4
  In-Reply-To: <dcc563d10811061445h32c5ad72o84f367d7cc3c6899@mail.gmail.com>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox