Re: HEADS UP: New ZFS in the tree.

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On 24 Nov, 2008, at 11:27 , Nikolay Denev wrote:

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On 23 Nov, 2008, at 01:05 , Pawel Jakub Dawidek wrote:

On Fri, Nov 21, 2008 at 05:25:18PM +0100, Pawel Jakub Dawidek wrote:
On Wed, Nov 19, 2008 at 01:58:49PM +0200, Nikolay Denev wrote:
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On 19 Nov, 2008, at 11:48 , Nikolay Denev wrote:

Well, it looks like that on -current and a 4G amd64 machine probably
there is no need
to tune anything. Here are my defaults with everything vm and zfs
related in loader.conf commented :

vm.kmem_size_max: 4509713203
vfs.zfs.arc_max: 863907840


I was able to panic it again with "kmem_map too small" with these
settings (defaults).

This are the bonnie++ arguments that i've used:
bonnie++ -d /tank -c 4 -r 4096 -x 9999999 -u 0:0

I wasn't able to panic my test machine running this command on i386
machine with this in /boot/loader.conf:

vm.kmem_size=1073741824
vm.kmem_size_max=1073741824

(1GB)

Although I now found that you were trying raidz2 and I had two two- way
mirrors. I'm retrying now.

Ok, I tried RAIDZ2 on top of five disks - no panics.

--
Pawel Jakub Dawidek http://www.wheel.pl
pjd@xxxxxxxxxxx http://www.FreeBSD.org
FreeBSD committer Am I Evil? Yes, I Am!


My test machine is still running the bonnie++ loop that i've started on friday,
with only vfs.zfs.arc_max=512M in loader.conf.
Seems pretty stable.

I'll retry just one more time without the vfs.zfs.arc_max tunable to see if it's going to panic again.

- --
Regards,
Nikolay Denev



With absolutely nothing in loader.conf and these defaults :

vfs.zfs.arc_max: 863907840
vm.kmem_size: 1382252544
vm.kmem_size_max: 4509713203

I got spontaneous reboot in only after 20-30 minutes of bonnie++

- --
Regards,
Nikolay Denev




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