Re: Intel 710 pgbench write latencies

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От Magnus Hagander
Тема Re: Intel 710 pgbench write latencies
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Msg-id CABUevExmdcPwY4nw0FZFp2dx8E-rqjHK-eaPvuH47YxGq+Nnvg@mail.gmail.com
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Ответ на Re: Intel 710 pgbench write latencies  (Yeb Havinga <yebhavinga@gmail.com>)
Ответы Re: Intel 710 pgbench write latencies  (Yeb Havinga <yebhavinga@gmail.com>)
Список pgsql-performance
On Wed, Nov 2, 2011 at 16:04, Yeb Havinga <yebhavinga@gmail.com> wrote:
> On 2011-11-02 15:06, Kevin Grittner wrote:
>>
>> Yeb Havinga<yebhavinga@gmail.com>  wrote:
>>
>>> I'm now contemplating not using the 710 at all. Why should I not
>>> buy two 6Gbps SSDs without supercap (e.g. Intel 510 and OCZ Vertex
>>> 3 Max IOPS) with a IO controller+BBU?
>>
>> Wouldn't the data be subject to loss between the time the IO
>> controller writes to the SSD and the time it makes it from buffers
>> to flash RAM?
>
> Good question. My guess would be no, if the raid controller does
> 'write-throughs' on the attached disks, and the SSD's don't lie about when
> they've written to RAM.

Doesn't most SSDs without supercaps lie about the writes, though?

--
 Magnus Hagander
 Me: http://www.hagander.net/
 Work: http://www.redpill-linpro.com/

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