Cool, but i may try this on a VM and maybe try this on a expermential production system after I test it on VM since a real system may help the progress of the new ZFS sinc On Tue, Aug 31, 2010 at 8:09 PM, Zhu Han <schumi.han_at_gmail.com> wrote: > That's cool. Thank you for your work on it. > > best regards, > hanzhu > > > On Wed, Sep 1, 2010 at 5:59 AM, Pawel Jakub Dawidek <pjd_at_freebsd.org> wrote: > >> Hello. >> >> I'd like to give you ZFS v28 for testing. If you are neither brave nor >> mad, you can stop here. >> >> The patchset is very experimental. It can eat your cookie and hurt your >> teddy bear, so be warned. Don't try it for anything except testing. >> >> This patchset is also a message we, as the FreeBSD project, would like >> to send to our users: Eventhough OpenSolaris is dead, the ZFS file >> system is going to stay in FreeBSD. At this point we have quite a few >> developers involved in ZFS on FreeBSD as well as serveral companies. >> We are also looking forward to work with IllumOS. >> >> So, what this new ZFS brings? >> >> - Data deduplication. Read more here: >> >> http://blogs.sun.com/bonwick/entry/zfs_dedup >> >> - Triple parity RAIDZ (RAIDZ3). Read more here: >> >> http://dtrace.org/blogs/ahl/2009/07/21/triple-parity-raid-z/ >> >> - zfs diff. Read more here: >> >> >> http://arc.opensolaris.org/caselog/PSARC/2010/105/20100328_tim.haley >> >> - zpool split. Read more here: >> >> >> http://arc.opensolaris.org/caselog/PSARC/2009/511/20090924_mark.musante >> >> - Snapshot holds. Read more here: >> >> >> http://arc.opensolaris.org/caselog/PSARC/2009/297/20090511_chris.kirby >> >> - zpool import -F. Allows to rewind corrupted pool to earlier >> transaction group. >> >> - Possibility to import pool in read-only mode. >> >> And much, much more, including plenty of preformance improvements and bug >> fixes. >> >> So test whatever you can and report back. Look for regressions, strange >> behaviour, missing features, deadlocks, livelocks, preformance >> degradation, etc. >> >> The boot code is not updated at all, so booting off of ZFS doesn't >> currently work. >> >> The patch is against today's FreeBSD HEAD. >> >> The patch enables (in sys/modules/zfs/Makefile) ZFS internal debugging, >> please don't turn it off. Also, compile your kernel with the following >> options: >> >> options KDB >> options DDB >> options INVARIANTS >> options INVARIANT_SUPPORT >> options WITNESS >> options WITNESS_SKIPSPIN >> options DEBUG_LOCKS >> options DEBUG_VFS_LOCKS >> >> Ignore all the LOR (Lock Order Reversal) reports from WITNESS. There will >> be plenty of those, and you'll desperately want to report them, but please >> don't. >> >> The best way to report a problem is to answer to this e-mail with as short >> as possible procedure of how to reproduce it and debugging info. I'd >> prefer textdump if possible. Below you can find quick procedure how to >> setup textdumps: >> >> Choose spare/swap disk/partition in your system, let's say it is >> /dev/ad0s1b. >> >> Add the following line to /etc/fstab: >> >> /dev/ad0s1b none swap sw 0 0 >> >> Add the following line to /etc/rc.conf: >> >> ddb_enable="YES" >> >> Run the following commands: >> >> # /etc/rc.d/swap1 start >> # /etc/rc.d/dumpon start >> # /etc/rc.d/ddb start >> >> This will setup swap, mark it as dump device and setup some DDB >> scripts. Or you can just reboot. >> >> Now when your system panic or deadlock, enter DDB and call the >> following command: >> >> ddb> run kdb.enter.panic >> >> It will execute all the commands I need, dump them in text format to >> your swap device and reboot machine. >> >> After the reboot, you should find textdump.tar.0 file in /var/crash/ >> directory. This is the debug info I need. >> >> End of textdumps procedure. >> >> Ok, now that I know you read everything carefully, here is the patch: >> >> http://people.freebsd.org/~pjd/patches/zfs_20100831.patch.bz2<http://people.freebsd.org/%7Epjd/patches/zfs_20100831.patch.bz2> >> >> Good luck! >:> >> >> -- >> Pawel Jakub Dawidek http://www.wheelsystems.com >> pjd_at_FreeBSD.org http://www.FreeBSD.org >> FreeBSD committer Am I Evil? Yes, I Am! >> > _______________________________________________ > freebsd-current_at_freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org" >Received on Wed Sep 01 2010 - 03:49:54 UTC
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