[sheepdog] ledger object leak

[Ruoyu]

According to current sheepdog's rule, deleting a vdi, no matter it is 
snapshot or not, its vdi object, in another word, ledger object, will 
not be removed from disks.

I think it is necessary for collecting allocated vdi in node recovery. 
Otherwise, the deleted vdi id might be reused. However, because data 
objects are copy-on-write, the allocated vdi id probably belongs to 
other vdi so that the deleted vdi id must not be reused.

Therefore, it is not a bug. But it is still a good question.

On 2014年10月24日 06:01, Valerio Pachera wrote:
> Hi, this isn't urgent but I opened a bug as a reminder:
> https://bugs.launchpad.net/sheepdog-project/+bug/1384951
>
> Correct me if I'm wrong: as a workaround, when there are no snapshots
> I can safely remove all ledger objects but the last.
>
> cd /mnt/sheep/0
> ls 8*
> 807c2b2500000000
> 807c2b2700000000
> 807c2b2900000000
> 807c2b2a00000000
> 807c2b2b00000000
> 807c2b2c00000000
> 807c2b2e00000000
> 807c2b2f00000000
>
> ls 8* | grep -v 807c2b2f00000000 | xargs rm
>
> Thank you.