Re: Hardware vs Software RAID

От: Vivek Khera
Тема: Re: Hardware vs Software RAID
Дата: ,
Msg-id: 97454AF8-315A-4B3D-8F95-D96B190C6909@khera.org
(см: обсуждение, исходный текст)
Ответ на: Re: Hardware vs Software RAID  (Matthew Wakeling)
Ответы: Re: Hardware vs Software RAID  (Matthew Wakeling)
Список: pgsql-performance

Скрыть дерево обсуждения

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 Jun 25, 2008, at 11:35 AM, Matthew Wakeling wrote:

> On Wed, 25 Jun 2008, Greg Smith wrote:
>> A firewire-attached log device is an extremely bad idea.
>
> 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.


В списке pgsql-performance по дате сообщения:

От: "Peter T. Breuer"
Дата:
Сообщение: Re: Hardware vs Software Raid
От: "Merlin Moncure"
Дата:
Сообщение: Re: Hardware vs Software Raid