Date: Thu, 14 Nov 2013 18:41:49 +0000 From: "Teske, Devin" <Devin.Teske@fisglobal.com> To: Marcus Reid <marcus@blazingdot.com> Cc: freebsd-fs <freebsd-fs@freebsd.org>, Devin Teske <dteske@freebsd.org>, "Teske, Devin" <Devin.Teske@fisglobal.com>, Allan Jude <freebsd@allanjude.com> Subject: Re: Defaults in 10.0 ZFS through bsdinstall Message-ID: <2C8721E4-4BE6-4BB5-B310-02084392D053@fisglobal.com> In-Reply-To: <5285148E.6020903@allanjude.com> References: <20131114173423.GA21761@blazingdot.com> <59A9B68B-4134-4217-83F3-B99759174EFE@fisglobal.com> <5285148E.6020903@allanjude.com>
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Let's try this again (darn GPG and it's inline quoting bug on Mac) On Nov 14, 2013, at 10:21 AM, Allan Jude wrote: > On 2013-11-14 9:34, Reid, Marcus wrote: >>=20 >> Hi, >>=20 >> I noticed a couple of things with the ZFS defaults that result from >> using the new installer in 10.0-BETA3. >>=20 >> One, atime is turned off everywhere by default. There was a thread on >> this list on June 8 with a subject of 'Changing the default for ZFS >> atime to off?', and from what I can tell the idea of turning off atime >> by default was not a popular one. >>=20 >> Two, and probably less controversial, is that fletcher4 is specified >> exlicitly on the root pool, even though it is default (wouldn't you just >> want to go with the default, in case it changes?) >>=20 >> Marcus >=20 > I have never heard a good argument for having atime on. The performance > penalty on ZFS is quite large, and it also makes your snapshots grow > constant. If you have a use for it, you can turn it on I guess. This > would be solved by having the dataset editor we're planning for 10.1 >=20 Seems easy enough to turn on once installed. And like Allan says, the editor for 10.1 would allow changing of the default. I'll add that if scripting it, you can (in current state for 10.0) change t= he dataset options at-will. > The fletcher4 thing is a leftover, from older versions of ZFS where the > default was fletcher2, I suppose we can remove it Let me put something together. --=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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