[sheepdog-users] cluster data distribution

[Valerio Pachera]

Hi, yesterday I plugged new device in my production cluster.
Everything went fine.

Looking at node info, node id 2 is less used.

root at sheepdog004:~# collie node info
Id      Size    Used    Use%
 0      1.6 TB  778 GB   47%
 1      1.6 TB  723 GB   42%
 2      2.1 TB  175 GB    8%
Total   5.4 TB  1.6 TB   30%
Total virtual image size        1.2 TB

When we add devices to a cluster, I guess sheepdog is not going to
redistribute/balance the nodes load, right?
Node info is showing "size", that I think should be the total size, or
is it the free space? All 3 nodes are using 500G + 2T devices.

Before adding devices cluster was
id0 1 device 2T
id1 1 device 2T
id2 1 device 500G

Now
id0 1 device 2T + 1 device 500G
id1 1 device 2T + 1 device 500G
id1 1 device 2T + 1 device 500G

root at sheepdog001:~# df -h
/dev/sdc1                                               1,9T  545G
1,3T  30% /mnt/ST2000DM001-1CH164_W1E2N5G6
/dev/sdb1                                               466G  234G
233G  51% /mnt/wd_WMAYP0904279

root at sheepdog002:~# df -h
/dev/sdc1                                               1,9T  548G
1,3T  30% /mnt/ST2000DM001-1CH164_W1E2N5GM
/dev/sdb1                                               466G  176G
291G  38% /mnt/wd_WMAYP1690412

root at sheepdog004:~# df -h
/dev/sdc1                 466G   40G    427G   9% /mnt/wd_WCAYUEP99298
/dev/sdd1                 1,9T  154G    1,7T   9% /mnt/wd_WCAWZ1588874


root at sheepdog004:~# collie node md info --all
Id      Size    Use     Path
Node 0:
 0      1.3 TB  544 GB  /mnt/ST2000DM001-1CH164_W1E2N5G6/obj
 1      232 GB  233 GB  /mnt/wd_WMAYP0904279
Node 1:
 0      1.3 TB  548 GB  /mnt/ST2000DM001-1CH164_W1E2N5GM/obj
 1      290 GB  175 GB  /mnt/wd_WMAYP1690412
Node 2:
 0      426 GB  22 GB   /mnt/wd_WCAYUEP99298/obj
 1      1.7 TB  153 GB  /mnt/wd_WCAWZ1588874