Plans for Logged/Journaled UFS
Thomas Burgess
wonslung at gmail.com
Sun Dec 20 12:18:00 UTC 2009
i remember reading that NFS needs tuning with ZFS even on solaris so you
might want to look into that....i'm not an expert though.
I CAN say this though. I have a machine with 12 drives and 8gb ram that i
use for samba. FreeBSD 8.0 ZFS v13
It has only 10 or so clients but it has no problem maxing out 2 gigabit
lines and it never freezes. It took some tuning for samba but it works
great.
On Sun, Dec 20, 2009 at 7:09 AM, Attila Nagy <bra at fsn.hu> wrote:
> For that problem, it can be true, the machine in speak has only 1 GB RAM
> (i386), although 8 disks.
> The freeze is a different beast, I've got it on 32-64 GB RAM machines (with
> NFS), and on 8 GB machines serving stuff with ftp/http/rsync/etc (no NFS).
> I'm not sure that the NFS and the non-NFS case is the same though.
>
> Thomas Burgess wrote:
>
>>
>> I think it depends on hardware and setup. I've noticed the "zfs problem"
>> with SOME machines when it comes to rtorrent (the rtorrent process will be
>> stuck "waiting for disk" but on other machines it's fine.
>> The machines i've had the most problem with are single drive less than 2
>> gb ram.
>>
>> I've got rtorrent and zfs working fine on plenty of machines with 2-3 hard
>> drives and 4-8 gb ram.
>>
>> On Sun, Dec 20, 2009 at 6:51 AM, Attila Nagy <bra at fsn.hu <mailto:
>> bra at fsn.hu>> wrote:
>>
>> Matthew Jacob wrote:
>>
>> Hussain Ali wrote:
>>
>>
>> ZFS doesnt suffice for may use cases - so just wondering
>> if this is in
>> the works.
>>
>>
>> Which use cases can you name?
>>
>> Reliable data storage. :(
>>
>> Sadly, ZFS in FreeBSD is still very far from being stable. For
>> example I have NFS servers running on ZFS, and they freeze about
>> every week. It seems it's related to NFS.
>> I can't even get to the debugger. After sending an NMI, the kernel
>> writes "NMI ... going to debugger" eight times (those machines
>> have 8 CPU cores) and nothing happens, I can only reset.
>>
>> Another machine just looses ZFS access (all processes stuck in IO)
>> on i386 if I run rtorrent with unlimited bandwidth with some
>> torrents, or some disk intensive spam filtering. Access to UFS
>> filesystems are still OK.
>>
>> Also, running UFS and ZFS seems to have problems in 8-STABLE with
>> UFS eating out memory from ZFS.
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>
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