[sheepdog] Redundancy policy via iSCSI

Hitoshi Mitake mitake.hitoshi at lab.ntt.co.jp
Wed Feb 4 03:24:21 CET 2015


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   130.1.0.147:7000        128          0
> >>>>     1   130.1.0.148:7000        128          0
> >>>>     2   130.1.0.149:7000        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.

Thanks,
Hitoshi

> 
> Thank your very much!
> Hu
> 
> 
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