Re: [ADMIN] Re: Future plans for raw devices ?

[Bruce Momjian]

> > 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.

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