> > 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@candle.pha.pa.us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
