Message-ID: <4EB15BFE.9000309@gmail.com>
Date: Wed, 02 Nov 2011 16:04:30 +0100
From: Yeb Havinga <yebhavinga@gmail.com>
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To: Kevin Grittner <Kevin.Grittner@wicourts.gov>
CC: "pgsql-performance@postgresql.org" <pgsql-performance@postgresql.org>
Subject: Re: Intel 710 pgbench write latencies
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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.

I'll put this on my to test list for the new setup.

-- Yeb