From: Scott Carey <scott@richrelevance.com>
To: Greg Smith <greg@2ndQuadrant.com>, Jesper Krogh <jesper@krogh.cc>
CC: "pgsql-performance@postgresql.org" <pgsql-performance@postgresql.org>
Date: Thu, 7 Apr 2011 09:25:18 -0700
Subject: Re: Intel SSDs that may not suck
Thread-Topic: [PERFORM] Intel SSDs that may not suck
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Message-ID: <C9C32DB5.2ECE3%scott@richrelevance.com>
In-Reply-To: <4D9D502A.2010600@2ndQuadrant.com>
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On 4/6/11 10:48 PM, "Greg Smith" <greg@2ndQuadrant.com> wrote:
>Since they're bragging about it there, the safe bet is that the older R2
>unit had no such facility.
>
>I note that the Z-Drive R2 is basically some flash packed on top of an
>LSI 1068e controller, mapped as a RAID0 volume.

In Linux, you can expose it as a set of 4 JBOD drives, use software RAID
of any kind on that,
and have access to TRIM.  Still useless for (most) databases but may be
useful for other applications, if the reliability level is OK otherwise.

I wonder if the R3 will also be configurable as direct JBOD.


>It's possible they left
>the battery-backup unit on that card exposed, so it may be possible to
>do better with it.  The way they just stack those card layers together,
>the thing is practically held together with duct tape though.  That's
>not a confidence inspiring design to me.  The R3 drives are much more
>cleanly integrated.
>
>--=20
>Greg Smith   2ndQuadrant US    greg@2ndQuadrant.com   Baltimore, MD
>PostgreSQL Training, Services, and 24x7 Support  www.2ndQuadrant.us
>"PostgreSQL 9.0 High Performance": http://www.2ndQuadrant.com/books
>
>
>--=20
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