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_at_FreeBSD.org                           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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