[sheepdog-users] How much spaces is used by snapshots?

[Ing. Luca Lazzeroni - Trend Servizi Srl]

I forget another question; if I have a VDI with NO clones and NO snapshot, other VDIs with snapshot, I take a snapshot of first VDI (the one without snapshot) and after a while I delete the snapshot, is its allocated disk space released ?

I've tryed to follow the code inside sheep and plain_store to find the release function, but I didn't find it.

Thank you,

Il giorno 13/ago/2013, alle ore 09:55, Liu Yuan <namei.unix at gmail.com> ha scritto:

> On Tue, Aug 13, 2013 at 08:35:15AM +0200, Valerio Pachera wrote:
>> 2013/7/9 Liu Yuan <namei.unix at gmail.com>:
>>> Current algorithm only release space after all the snapshots and its clones are
>>> deleted. Kazutaka has a patch set in progress to release objects once they are
>>> not referenced by any snpashots & clone & working vdi. After this patch set get
>>> merged, deletion of snapshots will make effect of reduction of used space.
>> 
>> I tried now to delete 2 big snapshot and 1 small but I can't see space
>> getting freed.
>> 
>> # collie vdi list
>> ...
>> s backup_data    13  1.0 TB  103 GB  352 GB 2013-07-20 08:15   c8d134
>>   2  lug21_081501
>> s backup_data    14  1.0 TB   60 MB  455 GB 2013-07-21 08:15   c8d135
>>   2  lug22_081501
>> s backup_data    15  1.0 TB  104 GB  357 GB 2013-07-22 08:15   c8d136
>>   2  lug23_081501
>> ...
>> 
>> # collie node info
>> Id      Size    Used    Avail   Use%
>> 0      2.3 TB  1.7 TB  554 GB   76%
>> 1      2.4 TB  1.7 TB  766 GB   69%
>> 2      2.7 TB  2.1 TB  689 GB   75%
>> 3      2.3 TB  1.7 TB  544 GB   76%
>> Total   9.7 TB  7.2 TB  2.5 TB   74%
>> Total virtual image size        1.4 TB
>> 
>> # collie vdi delete -s 13 backup_data
>> # collie vdi delete -s 14 backup_data
>> # collie vdi delete -s 15 backup_data
>> 
>> # collie node info
>> Id      Size    Used    Avail   Use%
>> 0      2.3 TB  1.7 TB  554 GB   76%
>> 1      2.4 TB  1.7 TB  766 GB   69%
>> 2      2.7 TB  2.1 TB  689 GB   75%
>> 3      2.3 TB  1.7 TB  544 GB   76%
>> Total   9.7 TB  7.2 TB  2.5 TB   74%
>> Total virtual image size        1.4 TB
>> 
>> 0.7.0_rc0_12_g2b526ef
> 
> Kazutaka's object reclaim patch set isn't merged yet. Planned to get in after
> v0.7.0
> 
> Thanks
> Yuan
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Ing. Luca Lazzeroni - Trend Servizi Srl
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