Zeugswetter Andreas ADI SD wrote:

> > An improvement is going into 2.6.19 to handle asynchronous 
> > vector reads and writes. This was covered by Linux Weekly 
> > News a couple of weeks ago:
> > http://lwn.net/Articles/201682/
> That is orthogonal. We don't really need vector io so much, since we
> rely on OS readahead. We want asyc IO to tell the OS earlier, that we
> will need these random pages, and continue our work in the meantime.

Of course, you can use asynchronous vector write with a single entry in
the vector if you want to perform an asynchronous write.

Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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