Thanks Josh! This is a lot clearer now.
I understand that librbd is low-level, but still, a warning wouldn't
hurt, would it? Just check if the size parameter is larger than the
cluster capacity, no?
Thank you for pointing out the trick of simply deleting the rbd_header,
I will try that now.
--
http://www.wogri.at
On Nov 21, 2013, at 10:30 AM, nicolasc nicolas.cance...@surfsara.nl wrote:
Thanks Josh! This is a lot clearer now.
I understand that librbd is low-level, but still, a warning wouldn't hurt,
would it? Just check if the size parameter is larger than the cluster
Yes, I understand that creating an image larger than the cluster may
sometimes be considered a feature. I am not suggesting it should be
forbidden, simply that it should display a warning message to the operator.
Full disc: I am not a Ceph dev, this is a simple user's opinion
Best regards,
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.gl...@ecologic.eu
wrote:
Hi Nicolas
just fyi
rbd format 2
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
On 11/20/2013 06:53 AM, nicolasc wrote:
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
Hi every one,
In the course of playing with RBD, I noticed a few things:
* The RBD images are so thin-provisioned, you can create arbitrarily
large ones.
On my 0.72.1 freshly-installed empty 200TB cluster, I was able to
create a 1PB image:
$ rbd create --image-format 2 --size 1073741824
Hi Nicolas
just fyi
rbd format 2 is not supported yet by the linux kernel (module)
it only can be used as a target for virtual machines using librbd
see: man rbd -- --image-format
shrinking time: same happend to me,
rbd (v1) device
took about a week to shrink from 1PB to 10TB
the good news: I
On 11/19/13, 2:10 PM, Wolfgang Hennerbichler wo...@wogri.com wrote:
On Nov 19, 2013, at 3:47 PM, Bernhard Glomm bernhard.gl...@ecologic.eu
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
So is there any size limit on RBD images? I had a failure this morning
mounting 1TB RBD. Deleting now (why does it take so long to delete if it was
never even mapped, much less written to?) and will retry with smaller images.
See output below. This is 0.72 on Ubuntu 13.04 with 3.12 kernel.
-Original Message-
From: Gruher, Joseph R
Sent: Tuesday, November 19, 2013 12:24 PM
To: 'Wolfgang Hennerbichler'; Bernhard Glomm
Cc: ceph-users@lists.ceph.com
Subject: RE: [ceph-users] Size of RBD images
So is there any size limit on RBD images? I had a failure this morning
mounting
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