| From: | Yeb Havinga <yebhavinga(at)gmail(dot)com> |
|---|---|
| To: | Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov> |
| Cc: | "pgsql-performance(at)postgresql(dot)org" <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: Intel 710 pgbench write latencies |
| Date: | 2011-11-02 15:04:30 |
| Message-ID: | 4EB15BFE.9000309@gmail.com |
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| Lists: | pgsql-performance |
On 2011-11-02 15:06, Kevin Grittner wrote:
> Yeb Havinga<yebhavinga(at)gmail(dot)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.
I'll put this on my to test list for the new setup.
-- Yeb
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