Re: Re: Future plans for raw devices ?
От | Bruce Momjian |
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Тема | Re: Re: Future plans for raw devices ? |
Дата | |
Msg-id | 200006021812.OAA28654@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Re: Re: Future plans for raw devices ? (Max Pyziur <pyz@panix.com>) |
Ответы |
Re: Re: Future plans for raw devices ?
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Список | pgsql-admin |
> On Fri, 2 Jun 2000, Bruce Momjian wrote: > > > > > 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. > > I beg to differ. Informix (the system my shop uses) blazes using raw > devices; Oracle (from what I understand) does also. Sybase (a resource > hog), on the other hand, seems to prefer cooked file systems. I know about Informix, but I heard Oracle was moving away from raw devices, and the speed improvement was only a few percentage points. -- 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
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