Date: Wed, 20 May 2009 15:41:08 -0700 From: Kip Macy <kmacy@freebsd.org> To: Mike Tancsa <mike@sentex.net> Cc: freebsd-stable@freebsd.org Subject: Re: ZFS MFC heads up Message-ID: <3c1674c90905201541n65f997e6jaa20d93bf566fb98@mail.gmail.com> In-Reply-To: <200905202209.n4KM9Bcg094853@lava.sentex.ca> References: <3c1674c90905201459k19776d53n309b2abeab0f8d0a@mail.gmail.com> <200905202209.n4KM9Bcg094853@lava.sentex.ca>
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On Wed, May 20, 2009 at 3:11 PM, Mike Tancsa <mike@sentex.net> wrote: > At 05:59 PM 5/20/2009, Kip Macy wrote: >> >> If you choose to upgrade a pool to take advantage of new features you >> will no longer be able to use it with sources prior to today. 'zfs >> send/recv' is not expected to inter-operate between different pool >> versions. > > Hi, > =A0 =A0 =A0 =A0Thanks for working on ZFS! =A0 Is there a summary of the n= ew features > somewhere ? > > =A0 =A0 =A0 =A0---Mike > Primarily what was in Pawel's commit to HEAD (see below). The following changes have also been brought in: - the recurring deadlock was fixed by deferring vinactive to a dedicated th= read - zfs boot for all types now works - kmem now goes up to 512GB so arc is now limited by physmem - the arc now experiences backpressure from the vm (which can be too much - but allows ZFS to work without any tunables on amd64) Revision 185029 - (view) (annotate) - [select for diffs] Modified Mon Nov 17 20:49:29 2008 UTC (6 months ago) by pjd File length: 38244 byte(s) Diff to previous 177698 Update ZFS from version 6 to 13 and bring some FreeBSD-specific changes. This bring huge amount of changes, I'll enumerate only user-visible changes= : - Delegated Administration Allows regular users to perform ZFS operations, like file system creation, snapshot creation, etc. - L2ARC Level 2 cache for ZFS - allows to use additional disks for cache. Huge performance improvements mostly for random read of mostly static content. - slog Allow to use additional disks for ZFS Intent Log to speed up operations like fsync(2). - vfs.zfs.super_owner Allows regular users to perform privileged operations on files stored on ZFS file systems owned by him. Very careful with this one. - chflags(2) Not all the flags are supported. This still needs work. - ZFSBoot Support to boot off of ZFS pool. Not finished, AFAIK. Submitted by: dfr - Snapshot properties - New failure modes Before if write requested failed, system paniced. Now one can select from one of three failure modes: - panic - panic on write error - wait - wait for disk to reappear - continue - serve read requests if possible, block write requests - Refquota, refreservation properties Just quota and reservation properties, but don't count space consumed by children file systems, clones and snapshots. - Sparse volumes ZVOLs that don't reserve space in the pool. - External attributes Compatible with extattr(2). - NFSv4-ACLs Not sure about the status, might not be complete yet. Submitted by: trasz - Creation-time properties - Regression tests for zpool(8) command. Obtained from: OpenSolaris
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