| From: | Josh Berkus <josh(at)agliodbs(dot)com> |
|---|---|
| To: | John A Meinel <john(at)arbash-meinel(dot)com> |
| Cc: | David Parker <dparker(at)tazznetworks(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: seqential vs random io |
| Date: | 2005-05-23 22:32:35 |
| Message-ID: | 200505231532.35532.josh@agliodbs.com |
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| Lists: | pgsql-performance |
David,
> > I just got a question from one our QA guys who is configuring a RAID 10
> > disk that is destined to hold a postgresql database. The disk
> > configuration procedure is asking him if he wants to optimize for
> > sequential or random access. My first thought is that random is what we
> > would want, but then I started wondering if it's not that simple, and my
> > knowledge of stuff at the hardware level is, well, limited.....
> >
> > If it were your QA guy, what would you tell him?
Depends on the type of database. OLTP or Web == random access. Data
Warehouse == sequential access.
--
--Josh
Josh Berkus
Aglio Database Solutions
San Francisco
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