From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Karel Zak <zakkr(at)zf(dot)jcu(dot)cz> |
Cc: | norbert(dot)meissner(at)str(dot)daimler-benz(dot)com, Ohgaki Yasuo <yasuo_ohgaki(at)hotmail(dot)com>, pgsql-admin(at)postgresql(dot)org |
Subject: | Re: Re: Future plans for raw devices ? |
Date: | 2000-06-02 16:12:24 |
Message-ID: | 200006021612.MAA16394@candle.pha.pa.us |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-admin |
> > 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.
>
> IMHO now is not in PG background for features like I/O raw or on-line
> replication. It needs better storage layout and tablespace feature.
Vadim is working on storage layout for 7.2, and replication should be
done after WAL is implemented.
--
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
From | Date | Subject | |
---|---|---|---|
Next Message | Karel Zak | 2000-06-02 16:42:20 | Re: Re: Future plans for raw devices ? |
Previous Message | Karel Zak | 2000-06-02 16:09:37 | Re: Re: Future plans for raw devices ? |