Re: Intel's X25-M SSD

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От Bruce Momjian
Тема Re: Intel's X25-M SSD
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Msg-id 200809240324.m8O3Ovn06515@momjian.us
обсуждение исходный текст
Ответ на Re: Intel's X25-M SSD  (Greg Smith <gsmith@gregsmith.com>)
Ответы Re: Intel's X25-M SSD  ("Scott Carey" <scott@richrelevance.com>)
Список pgsql-performance
Greg Smith wrote:
> On Mon, 8 Sep 2008, Merlin Moncure wrote:
>
> > What's interesting about the X25 is that they managed to pull the
> > numbers they got out of a MLC flash product.  They managed this with a
> > DRAM buffer and the custom controller.
>
> I finally found a good analysis of what's wrong with most of the cheap MLC
> drives:
>
> http://www.anandtech.com/cpuchipsets/intel/showdoc.aspx?i=3403&p=7
>
> 240ms random write latency...wow, no wonder I keep hearing so many reports
> of cheap SSD just performing miserably.  JMicron is one of those companies
> I really avoid, never seen a design from them that wasn't cheap junk.
> Shame their awful part is in so many of the MLC flash products.

I am surprised it too so long to identify the problem.

--
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + If your life is a hard drive, Christ can be your backup. +

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