Re: Size of RBD images

[nicolasc <nicolas.canceill@xxxxxxxxxxx>]

Thank you Bernhard and Wogri. My old kernel version also explains the format issue. Once again, sorry to have mixed that in the problem.

Back to my original inquiries, I hope someone can help me understand why:
* it is possible to create an RBD image larger than the total capacity of the cluster
* a large empty image takes longer to shrink/delete than a small one

Best regards,

Nicolas Canceill
Scalable Storage Systems
SURFsara (Amsterdam, NL)

On 11/20/2013 01:56 PM, Bernhard Glomm wrote:

That might be,
manpage of
ceph version 0.72.1
tells me it isn't though.
anyhow still running kernel 3.8.xx

Bernhard

Am 19.11.2013 20:10:04, schrieb Wolfgang Hennerbichler:

On Nov 19, 2013, at 3:47 PM, Bernhard Glomm <bernhard.glomm@xxxxxxxxxxx> wrote:

Hi Nicolas
just fyi
rbd format 2 is not supported yet by the linux kernel (module)

I believe this is wrong. I think linux supports rbd format 2 images since 3.10.

wogri

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