Date: Sat, 8 Jun 2013 19:27:54 +0000 From: "Teske, Devin" <Devin.Teske@fisglobal.com> To: Steven Hartland <smh@freebsd.org> Cc: Devin Teske <dteske@freebsd.org>, "fs@freebsd.org" <fs@freebsd.org> Subject: Re: Changing the default for ZFS atime to off? Message-ID: <13CA24D6AB415D428143D44749F57D7201F78158@ltcfiswmsgmb21> In-Reply-To: <16FEF774EE8E4100AD2CAEC65276A49D@multiplay.co.uk> References: <16FEF774EE8E4100AD2CAEC65276A49D@multiplay.co.uk>
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On Jun 8, 2013, at 11:54 AM, Steven Hartland wrote: > One of the first changes we make here when installing machines > here to changing atime=3Doff on all ZFS pool roots. >=20 > I know there are a few apps which can rely on atime updates > such as qmail and possibly postfix, but those seem like special > cases for which admins should enable atime instead of the other > way round. >=20 > This is going to of particular interest for flash based storage > which should avoid unnessacary writes to reduce wear, but it will > also help improve performance in general. >=20 > So what do people think is it worth considering changing the > default from atime=3Don to atime=3Doff moving forward? >=20 +1 we turn it off on every ZFS filesystem (but we also don't use ZFS for ro= ot) > If so what about UFS, same change? >=20 We leave atime enabled for UFS root partition, /usr partition, /tmp partiti= on, and /var But if/when we do use UFS for non-system partitions, we turn it off there t= oo. --=20 Devin _____________ The information contained in this message is proprietary and/or confidentia= l. If you are not the intended recipient, please: (i) delete the message an= d all copies; (ii) do not disclose, distribute or use the message in any ma= nner; and (iii) notify the sender immediately. In addition, please be aware= that any message addressed to our domain is subject to archiving and revie= w by persons other than the intended recipient. Thank you.
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