| From: | "Rick Gigger" <rick(at)alpinenetworking(dot)com> |
|---|---|
| To: | <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: SCSI vs. IDE performance test |
| Date: | 2003-10-28 21:51:10 |
| Message-ID: | 004e01c39d9d$9a16aef0$0700a8c0@trogdor |
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| Lists: | pgsql-general |
> "Rick Gigger" <rick(at)alpinenetworking(dot)com> writes:
> >> "we have no portable means of expressing that exact constraint to the
> >> kernel"
> > Does this mean that specific operating systems have a better way of
dealing
> > with this? Which ones and how?
>
> I'm not aware of any that offer a way of expressing "write these
> particular blocks before those particular blocks". It doesn't seem like
> it would require rocket scientists to devise such an API, but no one's
> got round to it yet. Part of the problem is that the issue would have
> to be approached at multiple levels: there is no point in offering an
> OS-level API for this when the hardware underlying the bus-level API
> (IDE) is doing its level best to sabotage the entire semantics.
But for those of us using scsi wouldn't it be possible to get a performance
gain here? Would the gain be worth the effort?
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| Next Message | Martijn van Oosterhout | 2003-10-29 01:33:37 | Re: SCSI vs. IDE performance test |
| Previous Message | Lynn.Tilby | 2003-10-28 20:42:20 | Attribute 'rtrim' is repeated |