Re: SCSI vs. IDE performance test
От | Rick Gigger |
---|---|
Тема | Re: SCSI vs. IDE performance test |
Дата | |
Msg-id | 004e01c39d9d$9a16aef0$0700a8c0@trogdor обсуждение исходный текст |
Ответ на | Re: SCSI vs. IDE performance test (Bruce Momjian <pgman@candle.pha.pa.us>) |
Список | pgsql-general |
> "Rick Gigger" <rick@alpinenetworking.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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