[CFT] ZFS v16 with stat() speedup

Christof Schulze christof.schulze at gmx.com
Sun Jul 11 17:02:13 UTC 2010


Am Thursday 24 June 2010 20:04:43 schrieb Martin Matuska:
> As I have imported some more improvements to the ZFS v15 patch that also
> target speed,
> I am now calling for testing of v16 with mainly the following important
> (post-v16) enhancement (and some related bugfixes):
Thank you very much for your hard work. Yesterday I set up my system using the 
instructions below and I have had no problems so far.

This is an amd64 system with 8GB ram. I am willing to do additional testing if 
wanted but I'd need further instructions on that one.



> OpenSolaris Bug ID: 6775100 stat() performance on files on zfs should be
> improved
> This significantly improves stat() performance of ZFS and has a very
> positive effect on e.g webservers using PHP
> (I benchmarked a ~20% speed increase of PHP webserving)
> The patch is available here:
> http://people.freebsd.org/~mm/patches/zfs/v16/head-v16-extended.patch
> List of all changes (compared to current head and v15-patch):
> http://people.freebsd.org/~mm/patches/zfs/v16/head-v16.txt
> And again some ISOs (patched 8.1rc1) for testing:
> http://mfsbsd.vx.sk/iso/8.1rc1-zfsv16.iso (without symbols, 98.7MB)
> http://mfsbsd.vx.sk/iso/8.1rc1-zfsv16-debug.iso (with kernel symbols,
> 187.6MB)
> Login/password: root/mfsroot
> You can test these ISO's in Virtualbox, other emulation software or
> real-world systems.
> They contain a full installable distribution, here is a zfsinstall
> command example on an ad4 disk, with ZFS version 16, 4GB extra swap
> partition, lzjb compression and fletcher4 checksum:
> 1. Login as root (root:mfsroot)
> 2. mount_cd9660 /dev/acd0 /cdrom
> 3. zfsinstall -V 16 -t /cdrom/8.1-RC1-amd64.tar.xz -s 4G -c -4 -d ad4
> When mfsbsd (not the installed system) is booted, there is a python and
> py-zfs package in /packages. You can copy and install these to your
> installed system for full pyzfs functionality (zfs userspace, zfs
> groupspace, zfs allow, zfs unallow).
> Thanks for testing,
> mm
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