On Wed, May 20, 2009 at 3:11 PM, Mike Tancsa <m...@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,
> Thanks for working on ZFS! Is there a summary of the new features
> somewhere ?
>
> ---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 thread
- 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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