Date: Wed, 20 Mar 2013 23:46:09 -0000 From: "Steven Hartland" <killing@multiplay.co.uk> To: <lev@FreeBSD.org>, "Pawel Jakub Dawidek" <pjd@FreeBSD.org> Cc: freebsd-fs@freebsd.org Subject: Re: When will we see TRIM support for GELI volumes ? Message-ID: <69BACDB971CC4008B0546E3D5824A51D@multiplay.co.uk> References: <51479D54.1040509@gibfest.dk> <20130319082732.GB1367@garage.freebsd.pl> <1954349453.20130319225642@serebryakov.spb.ru>
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----- Original Message -----
From: "Lev Serebryakov" <lev@FreeBSD.org>
To: "Pawel Jakub Dawidek" <pjd@FreeBSD.org>
Cc: <freebsd-fs@freebsd.org>
Sent: Tuesday, March 19, 2013 6:56 PM
Subject: Re: When will we see TRIM support for GELI volumes ?
> Hello, Pawel.
> You wrote 19 марта 2013 г., 12:27:32:
>
> PJD> This is not what I see. On one of my SSDs in my laptop I've two
> PJD> partitions, both running ZFS, but one of them on top of GELI.
> PJD> I don't use ZFS TRIM yet, as I see no slowdown whatsoever.
> It depends on your SSD controller and write rate. SandForce-based SSD
> degrades badly without TRIM and can not recover performance by
> themselves if here is a lot of writes. But modern SSD on Marvell,
> Indilinx and LAMP-based SSD restore write performance after some idle
> time, not so effectively as with TRIM, but to very good level. And
> SF-2281 based SSD sucks in this area badly.
Also make sure your running 503 FW or above on controllers running
5 series FW otherwise TRIM will be broken :(
Regards
Steve
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