[sheepdog-users] Multidisk & ECC with one sheep daemon

[icez at icez.net]

I think you should run multiple sheepdog instance with 'local' cluster 
driver. Each binding to each disk so you may achieve the ecc parameter 
with 1 physical server act as 3 sheepdog nodes.

On 2015-05-20 17:19, Marcin Mirosław wrote:
> Hi!
> I'd like to use one sheep daemon with Multi disk and use ECC for
> cluster. I'm trying to do it in such way:
> # sudo -u sheepdog sheep
> /mnt/test/sheep0,/mnt/test/sheep1,/mnt/test/sheep2,/mnt/test/sheep3,/mnt/test/sheep4
> # dog cluster format -c 2:1
> Number of copies (3) is larger than number of nodes (1).
> Are you sure you want to continue? [yes/no]: yes
> using backend plain store
> # dog vdi create vditest 10G
> # dog vdi list
>   Name        Id    Size    Used  Shared    Creation time   VDI id
> Copies  Tag   Block Size Shift
>   vditest      0   10 GB  0.0 MB  0.0 MB 2015-05-20 12:02   c584fa
> 2:1                22
> 
> 
> Now I'm trying to use vdi using sheepfs:
> # sheepfs /mnt/sheep/
> # echo vditest > /mnt/sheep/vdi/mount
> # echo foobar > /mnt/sheep/volume/vditest
> -bash: echo: write error: Input/output error
> 
> In sheep's log I can find:
> May 20 12:06:22  ERROR [gway 24304] gateway_forward_request(507) There
> isn't enough copies(1) to send out (3)
> 
> # dog cluster info
> Cluster status: running, auto-recovery enabled
> 
> Cluster created at Wed May 20 12:10:04 2015
> 
> Epoch Time           Version [Host:Port:V-Nodes,,,]
> 2015-05-20 12:10:04      1 [127.0.0.1:7000:852(4)]
> 
> # sheep -v
> Sheepdog daemon version 0.9.0_161_gf30c170_dirty
> 
> Is it possible to use sheepdog in such configuration?
> 
> Thanks,
> Marcin
> P.S. Yesterday I noticed that branch 0.9 wasn't added to clang 
> analysis,
> it's fixed.