Re: SCSI vs. IDE performance test

It seems to me file system journaling should fix the whole problem by giving
you a record of what was actually commited to disk and what was not.  I must
not understand journaling correctly.  Can anyone explain to me how
journaling works.

----- Original Message ----- 
From: "Bruce Momjian" <pgman@candle.pha.pa.us>
To: <mikeb@netnation.com>
Cc: "Stephen" <jleelim@xxxxxx.com>; <pgsql-general@postgresql.org>
Sent: Monday, October 27, 2003 12:14 PM
Subject: Re: [GENERAL] SCSI vs. IDE performance test


> Mike Benoit wrote:
> > I just ran some benchmarks against a 10K SCSI drive and 7200 RPM IDE
> > drive here:
> >
> > http://fsbench.netnation.com/
> >
> > The results vary quite a bit, and it seems the file system you use
> > can make a huge difference.
> >
> > SCSI is obviously faster, but a 20% performance gain for 5x the cost is
> > only worth it for a very small percentage of people, I would think.
>
> Did you turn off the IDE write cache?  If not, the SCSI drive is
> reliable in case of OS failure, while the IDE is not.
>
> -- 
>   Bruce Momjian                        |  http://candle.pha.pa.us
>   pgman@candle.pha.pa.us               |  (610) 359-1001
>   +  If your life is a hard drive,     |  13 Roberts Road
>   +  Christ can be your backup.        |  Newtown Square, Pennsylvania
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