Re: raid10 write performance

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От Florian Weimer
Тема Re: raid10 write performance
Дата
Msg-id 82fx0et0ve.fsf@mid.bfk.de
обсуждение исходный текст
Ответ на Re: raid10 write performance  (Ivan Voras)
Ответы Re: raid10 write performance  (Ivan Voras)
Список pgsql-performance
Дерево обсуждения
raid10 write performance  (Grzegorz Jaśkiewicz, )
 Re: raid10 write performance  (Justin Graf, )
  Re: raid10 write performance  (Karl Denninger, )
   Re: raid10 write performance  (Dave Crooke, )
   Re: raid10 write performance  (Scott Carey, )
 Re: raid10 write performance  (Greg Smith, )
  Re: raid10 write performance  (Ivan Voras, )
   Re: raid10 write performance  (Florian Weimer, )
    Re: raid10 write performance  (Ivan Voras, )
     Re: raid10 write performance  (Matthew Wakeling, )
     Re: raid10 write performance  (Scott Marlowe, )
   Re: raid10 write performance  (Scott Marlowe, )
* Ivan Voras:

> On the other hand, RAID10 is simple enough that soft-RAID
> implementations should be more than adequate - any ideas why a dedicated
> card has it "slow"?

Barrier support on RAID10 seems to require some smallish amount of
non-volatile storage which supports a high number of write operations
per second, so a software-only solution might not be available.

--
Florian Weimer                <>
BFK edv-consulting GmbH       http://www.bfk.de/
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