Re: Hardware vs Software RAID

От: Matthew Wakeling
Тема: Re: Hardware vs Software RAID
Дата: ,
Msg-id: Pine.LNX.4.64.0806261705280.4085@aragorn.flymine.org
(см: обсуждение, исходный текст)
Ответ на: Re: Hardware vs Software RAID  (Vivek Khera)
Ответы: Re: Hardware vs Software RAID  ("Scott Marlowe")
Re: Hardware vs Software RAID  ("Merlin Moncure")
Список: pgsql-performance

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Hardware vs Software RAID  (Adrian Moisey, )
 Re: Hardware vs Software RAID  ("Merlin Moncure", )
  Re: Hardware vs Software RAID  (Matthew Wakeling, )
   Re: Hardware vs Software RAID  ("Peter T. Breuer", )
    Re: Hardware vs Software RAID  (Greg Smith, )
     Re: Hardware vs Software RAID  ("Jonah H. Harris", )
      Re: Hardware vs Software RAID  ("Joshua D. Drake", )
     Re: Hardware vs Software RAID  (Matthew Wakeling, )
      Re: Hardware vs Software RAID  (Vivek Khera, )
       Re: Hardware vs Software RAID  (Matthew Wakeling, )
        Re: Hardware vs Software RAID  ("Scott Marlowe", )
        Re: Hardware vs Software RAID  ("Merlin Moncure", )
         Re: Hardware vs Software RAID  (Matthew Wakeling, )
          Re: Hardware vs Software RAID  ("Merlin Moncure", )
     Re: Hardware vs Software RAID  ("Peter T. Breuer", )
      Re: Hardware vs Software RAID  (Greg Smith, )
     Re: Hardware vs Software RAID  (Robert Treat, )
   Re: Hardware vs Software RAID  ("Merlin Moncure", )
    Re: Hardware vs Software RAID  ("Peter T. Breuer", )
     Re: Hardware vs Software RAID  ("Merlin Moncure", )
      Re: Hardware vs Software Raid  ("Peter T. Breuer", )
       Re: Hardware vs Software Raid  ("Merlin Moncure", )
       Re: Hardware vs Software Raid  (, )
       Re: Hardware vs Software Raid  (Greg Smith, )
 Re: Hardware vs Software RAID  ("Scott Marlowe", )
  Re: Hardware vs Software RAID  ("Joshua D. Drake", )
   Re: Hardware vs Software RAID  ("Merlin Moncure", )
    Re: Hardware vs Software RAID  (Andrew Sullivan, )
     Re: Hardware vs Software RAID  ("Kevin Grittner", )
      Re: Hardware vs Software RAID  (Andrew Sullivan, )
     Re: Hardware vs Software RAID  (Greg Smith, )
    Re: Hardware vs Software RAID  (Greg Smith, )

On Thu, 26 Jun 2008, Vivek Khera wrote:
>> Anyone have experience with IDE, SATA, or SAS-connected flash devices like
>> the Samsung MCBQE32G5MPP-0VA? I mean, it seems lovely - 32GB, at a transfer
>> rate of 100MB/s, and doesn't degrade much in performance when writing small
>> random blocks. But what's it actually like, and is it reliable?
>
> None of these manufacturers rates these drives for massive amounts of writes.
> They're sold as suitable for laptop/desktop use, which normally is not a
> heavy wear and tear operation like a DB.  Once they claim suitability for
> this purpose, be sure that I and a lot of others will dive into it to see how
> well it really works.  Until then, it will just be an expensive brick-making
> experiment, I'm sure.

It claims a MTBF of 2,000,000 hours, but no further reliability
information seems forthcoming. I thought the idea that flash couldn't cope
with many writes was no longer true these days?

Matthew

--
I work for an investment bank. I have dealt with code written by stock
exchanges. I have seen how the computer systems that store your money are
run. If I ever make a fortune, I will store it in gold bullion under my
bed.                                              -- Matthew Crosby


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