[Sheepdog] vdi deletion and space reclaiming

[luc_rom at yahoo.com]

Hi again,

In my three nodes cluster, I had a few VDIs that I deleted using "collie vdi delete" from Sheepdog1, but I see that no space was reclaimed from any of the three Sheepdog nodes.

Before:

root at sheepdog1:~# collie vdi list
  name        id    size    used  shared    creation time   vdi id
------------------------------------------------------------------
  imagenew2     1  5.0 GB  5.0 GB  0.0 MB 2011-07-19 22:31   1a3b42
  imagenew3     1  1.0 GB  0.0 MB  0.0 MB 2011-07-19 23:26   1a3cf5
  image        1  1.0 GB   72 MB  0.0 MB 2011-07-18 14:27   28489a
  imagesmall     1  1.0 GB  1.0 GB  0.0 MB 2011-07-20 23:59   6a4c69

After:
root at sheepdog1:~# collie vdi delete imagenew2
root at sheepdog1:~# collie vdi delete imagenew3
root at sheepdog1:~# collie vdi delete image
root at sheepdog1:~# collie vdi delete imagesmall
root at sheepdog1:~# collie vdi list
  name        id    size    used  shared    creation time   vdi id
------------------------------------------------------------------

root at sheepdog1:~# sheep --help
Usage: sheep [OPTION] [PATH]
Sheepdog Daemon, version 0.2.3

root at sheepdog1:~# qemu-img create sheepdog:VM_disk -o preallocation=data 5G
Formatting 'sheepdog:VM_disk', fmt=raw size=5368709120 preallocation='data' 
root at sheepdog1:~# collie vdi list
  name        id    size    used  shared    creation time   vdi id
------------------------------------------------------------------
  VM_disk      1  5.0 GB  5.0 GB  0.0 MB 2011-07-21 10:30   d8d400

root at sheepdog1:~# du -h --max-depth=1 /store_dir/obj/
8.6G    /store_dir/obj/00000009
6.7G    /store_dir/obj/00000005
10G     /store_dir/obj/00000007
26G     /store_dir/obj/
On Sheepdog2, the disk space is still used:

root at sheepdog2:~/tgt# collie vdi list
  name        id    size    used  shared    creation time   vdi id
------------------------------------------------------------------
  VM_disk      1  5.0 GB  5.0 GB  0.0 MB 2011-07-21 10:30   d8d400
root at sheepdog2:~/tgt# du -h --max-depth=1 /store_dir/obj/
4.1M    /store_dir/obj/00000003
9.8G    /store_dir/obj/00000007
8.0K    /store_dir/obj/00000002
1.4G    /store_dir/obj/00000009
4.0K    /store_dir/obj/00000001
321M    /store_dir/obj/00000008
108K    /store_dir/obj/00000006
40K     /store_dir/obj/00000005
8.0K    /store_dir/obj/00000004
12G     /store_dir/obj/

Am I missing a step or how should I delete a VDI in order to reclaim the space?

Thank you for help and the great work you're doing.

George
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