Re: Fwd: Re: (no subject)

[Gaurav Goyal <er.gauravgoyal@xxxxxxxxx>]

Dear Ceph Users,

I need your help to redesign my ceph storage network.

As suggested in earlier discussions, i must not use SAN storage. So we have decided to removed it.

Now we are ordering Local HDDs.

My Network would be

Host1 --> Controller + Compute1 Host 2--> Compute2 Host 3 --> Compute3

Is it right setup for ceph network? For Host1 and Host2 , we are using 1 500GB disk for OS on each host .

Should we use same size storage disks 500GB *8 for ceph environment or i can order Disks in size of 2TB for ceph cluster?

Making it

2T X 2 on Host1 2T X 2 on Host 2 2T X 2 on Host 3

12TB in total. replication factor 2 should make it 6 TB?

Regards

On Tue, Aug 2, 2016 at 11:16 AM, Gaurav Goyal <er.gauravgoyal@xxxxxxxxx> wrote:

Hello Jason/Kees,

I am trying to take snapshot of my instance. 

Image was stuck up in Queued state and instance is stuck up in Image Pending Upload state.

I had to manually quit the job as it was not working since last 1 hour .. my instance is still in Image Pending Upload state.

Is it something wrong with my ceph configuration? 

can i take snapshots with ceph storage? How?

Regards

Gaurav Goyal

On Wed, Jul 13, 2016 at 9:44 AM, Jason Dillaman <jdillama@xxxxxxxxxx> wrote:

The RAW file will appear to be the exact image size but the filesystem
will know about the holes in the image and it will be sparsely
allocated on disk.  For example:

# dd if=/dev/zero of=sparse-file bs=1 count=1 seek=2GiB
# ll sparse-file
-rw-rw-r--. 1 jdillaman jdillaman 2147483649 Jul 13 09:20 sparse-file
# du -sh sparse-file
4.0K sparse-file

Now, running qemu-img to copy the image into the backing RBD pool:

# qemu-img convert -f raw -O raw ~/sparse-file rbd:rbd/sparse-file
# rbd disk-usage sparse-file
NAME        PROVISIONED USED
sparse-file       2048M    0

On Wed, Jul 13, 2016 at 3:31 AM, Fran Barrera <franbarrera6@xxxxxxxxx> wrote:
> Yes, but is the same problem isn't? The image will be too large because the
> format is raw.
>
> Thanks.
>
> 2016-07-13 9:24 GMT+02:00 Kees Meijs <kees@xxxxxxxx>:
>>
>> Hi Fran,
>>
>> Fortunately, qemu-img(1) is able to directly utilise RBD (supporting
>> sparse block devices)!
>>
>> Please refer to http://docs.ceph.com/docs/hammer/rbd/qemu-rbd/ for
>> examples.
>>
>> Cheers,
>> Kees
>>
>> On 13-07-16 09:18, Fran Barrera wrote:
>> > Can you explain how you do this procedure? I have the same problem
>> > with the large images and snapshots.
>> >
>> > This is what I do:
>> >
>> > # qemu-img convert -f qcow2 -O raw image.qcow2 image.img
>> > # openstack image create image.img
>> >
>> > But the image.img is too large.
>>
>> _______________________________________________
>> ceph-users mailing list
>> ceph-users@xxxxxxxxxxxxxx
>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>
>
>
> _______________________________________________
> ceph-users mailing list
> ceph-users@xxxxxxxxxxxxxx
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>

--
Jason

_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com

_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com