Re: How to improve db performance with $7K?

From: Richard_D_Levine(at)raytheon(dot)com
To: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
Cc: pgsql-performance(at)postgresql(dot)org, pgsql-performance-owner(at)postgresql(dot)org, "Mohan, Ross" <RMohan(at)arbinet(dot)com>
Subject: Re: How to improve db performance with $7K?
Date: 2005-04-19 16:22:17
Message-ID: OF555C0C8C.E17C1A26-ON05256FE8.0059549C-05256FE8.0059EE74@ftw.us.ray.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-performance

pgsql-performance-owner(at)postgresql(dot)org wrote on 04/19/2005 11:10:22 AM:
>
> What is 'multiple initiators' used for in the real world?

I asked this same question and got an answer off list: Somebody said their
SAN hardware used multiple initiators. I would try to check the archives
for you, but this thread is becoming more of a rope.

Multiple initiators means multiple sources on the bus issuing I/O
instructions to the drives. In theory you can have two computers on the
same SCSI bus issuing I/O requests to the same drive, or to anything else
on the bus, but I've never seen this implemented. Others have noted this
feature as being a big deal, so somebody is benefiting from it.

Rick
>
> --
> Bruce Momjian | http://candle.pha.pa.us
> pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
> + If your life is a hard drive, | 13 Roberts Road
> + Christ can be your backup. | Newtown Square, Pennsylvania
19073
>
> ---------------------------(end of broadcast)---------------------------
> TIP 7: don't forget to increase your free space map settings

In response to

Responses

Browse pgsql-performance by date

  From Date Subject
Next Message Tom Lane 2005-04-19 16:24:02 Re: Question on REINDEX
Previous Message Bruce Momjian 2005-04-19 16:16:01 Re: How to improve db performance with $7K?