[sheepdog] Redundancy policy via iSCSI
mitake.hitoshi at lab.ntt.co.jp
Fri Feb 6 09:41:01 CET 2015
At Wed, 04 Feb 2015 11:24:21 +0900,
Hitoshi Mitake wrote:
> At Tue, 3 Feb 2015 17:17:42 +0800,
> hujianyang wrote:
> > Hi Saeki,
> > On 2015/2/3 16:53, Saeki Masaki wrote:
> > > Hi Hu,
> > >
> > > Since Sheepdog has a mechanism that does not place objects in the same zone_id.
> > > Can you try to change ZONE id in each node.
> > >>>> Id Host:Port V-Nodes Zone
> > >>>> 0 188.8.131.52:7000 128 0
> > >>>> 1 184.108.40.206:7000 128 0
> > >>>> 2 220.127.116.11:7000 128 0
> > >
> > > Best Regards, Saeki.
> > >
> > Good suggestions~!
> > Seems OK now. But write performance is too slow in my environment.
> 1.1MB/s seems to be too slow, how about changing input file from
> /dev/random to /dev/zero? And I'd like to know perofrmance of default
> backing store of tgt (use file as iSCSI target) on your environment.
BTW, I have pending patchset for parallelizing iSCSI PDU send/recv of
You can activate the feature with new option -T:
$ tgtd -T 16
It is still half-baked, but in some cases it can improve performance
of iSCSI + sheepdog.
> > Thank your very much!
> > Hu
> > --
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