From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Max Pyziur <pyz(at)panix(dot)com> |
Cc: | pgsql-admin(at)postgresql(dot)org |
Subject: | Re: Re: Future plans for raw devices ? |
Date: | 2000-06-02 18:12:35 |
Message-ID: | 200006021812.OAA28654@candle.pha.pa.us |
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Thread: | |
Lists: | pgsql-admin |
> On Fri, 2 Jun 2000, Bruce Momjian wrote:
>
> > > > Most think that raw devices are a pain and offer little performance
> > > > improvement and lots of portability and coding problems.
> > >
> > > I don't know how much it is a performance improvement (someone say
> 10-20%),
> > > but Bruce is probably right, it is a huge work and with dependence on
> > > hardware & system implementation.
> > >
> > > We already discussed about it --- it is hacker's archive.
> >
> > One intresting issue is that commerical databases that recommended raw
> > spaces are moving away from them, which helps us to know that the
> > raw device benefit must be pretty small.
>
> I beg to differ. Informix (the system my shop uses) blazes using raw
> devices; Oracle (from what I understand) does also. Sybase (a resource
> hog), on the other hand, seems to prefer cooked file systems.
I know about Informix, but I heard Oracle was moving away from raw
devices, and the speed improvement was only a few percentage points.
--
Bruce Momjian | http://www.op.net/~candle
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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