Re: [Xen-API] Problems with creating snapshot

[George Shuklin <george.shuklin@xxxxxxxxx>]

I thought it depends on 'thin provision' part.

When snapshot created:

old vdi become 'base copy'
creating new empty differential vdi, pointing to base copy (named 'snapshot')
creating new empty differential vdi, pointing to base copy (named the 'original VDI')

Creation of those two vdi's require just about 16 Mb (8Mb per each).

But actual space reservation is completely depends on thin provision status.

For ISCSI/LVM/FC based SRs it is full reservation, for NFS/ext it can be thin.

On 10.07.2013 13:15, hook wrote:

Hi, you need at least same space free on the storage repository to create snapshot. Yes, it painfull but truth.

10.07.2013 11:02 ÐÐÐÑÐÐÐÐÑÐÐÑ "Thimo E." <abc@xxxxxxxxxx> ÐÐÐÐÑÐÐ:

Hi all,

want to create a snapshot of a VM in XCP 1.6 (using LVM):

The ÂVM has 2 Disks, one disk with 2047GB and one disk with 4 GB. Both disks are on a storage with 2300GB space. XenCenter says:

2055 GB used of 2304 GB total (2055 GB allocated)
--> 250GB free space (checked with vgdisplay)

Now the problem: When I try to create a snapshot with

xe vm-snapshot uuid=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx new-name-label=my-snapshot

the command reports:

Error code: SR_BACKEND_FAILURE_44
Error parameters: , There is insufficient space,

How much free space is needed or is there another problem ?

Best regards
 Thimo

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