From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lutz Vieweg Subject: Re: Software RAID and TRIM Date: Sun, 17 Jul 2011 23:57:12 +0200 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Tom De Mulder wrote: > Yes, it's (usually/ideally) the filesystem's job to invoke the TRIM > command Well, for us voluntarily (cron-triggered) batch-discards have shown to be the better option. If you leave it to the filesystem to trigger the discards, then you might lose write performance when you need it most. In comparison, a voluntarily triggered discard in some low-usage time is painless. Regards, Lutz Vieweg