Date: Tue, 19 Mar 2013 22:56:42 +0400 From: Lev Serebryakov <lev@FreeBSD.org> To: Pawel Jakub Dawidek <pjd@FreeBSD.org> Cc: freebsd-fs@freebsd.org Subject: Re: When will we see TRIM support for GELI volumes ? Message-ID: <1954349453.20130319225642@serebryakov.spb.ru> In-Reply-To: <20130319082732.GB1367@garage.freebsd.pl> References: <51479D54.1040509@gibfest.dk> <20130319082732.GB1367@garage.freebsd.pl>
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Hello, Pawel. You wrote 19 =D0=BC=D0=B0=D1=80=D1=82=D0=B0 2013 =D0=B3., 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. --=20 // Black Lion AKA Lev Serebryakov <lev@FreeBSD.org>
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