The question that comes to mint is "how sparse is the sparse file". I
know it sounds a bit strange but the bareos sparcity logic, as I see in
the docs is that it checks whether a 32k block is made entirely of
zeros. So if your sparse file doesn't have continuous 32k blocks
(properly aligned I suppose) it won't get treated as sparse.
On 13.07.2019 08:19, levindecaro wrote:
It is a sparse file i believe, by confirm that
[root@server export-domain]# du -hs VM1.ova
20G VM1.ova <--- actual size on disk
[root@server export-domain]# ls -l VM1.ova
-rw-------. 1 root root 179142214656 Jul 13 02:56 VM1.ova <--- real file size
After backup on bareos, it shown 167GB is backed up
After restore
[root@server export-domain]# ls -l ../restored/VM1.ova
-rw-------. 1 root root 177794008064 Jul 12 15:07 ../restored/VM1.ova
[root@mgnt21 export-domain]# du ../restored/VM1.ova
166G ../restored/VM1.ova <--- reverted to full allocated file.
On Friday, July 12, 2019 at 10:40:31 PM UTC+8, Spadajspadaj wrote:
Are you sure the OVA file is a sparse one? AFAIR, thin provisioning
means that the file size should sum up to already provisioned chunks of
data.
In other words, if inside the virtual machine you use 4G and have a 4G
file even though the maximum disk size is 30G you'd have a 4G file. But
it wouldn't be a sparse file.
If it were a sparse file, the filesystem would report a file size of 30G
but with only 4G of actual contents.
I hope I'm not making this overly confusing :-)
On 12.07.2019 09:56, levindecaro wrote:
Hi,
I'm using bareos 18.2, to backup bunch of ova files exported from
RHEV, the ova file size is the actual used size of the image after
export(thin image). However bareos still allocate the real size of
image during backup or restore. The sparse=yes options seems cannot
handle ova files.
Anyone has experience to workaround that?
Thank you!
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