How to write data to rbd pool.

How to write data to rbd pool.

[ramu eppa]

Hi all,

   I want write data or text file to rbd pool.Please help me.

Thanks,
Ramu.

Re: How to write data to rbd pool.

[Tommi Virtanen]

On Mon, Oct 1, 2012 at 8:38 AM, ramu eppa <ramu.freesystems@gmail.com> wrote:
> Hi all,
>
>    I want write data or text file to rbd pool.Please help me.

You can create objects in RADOS pools with "rados put". See
http://ceph.com/docs/master/man/8/rados/ for the documentation.

The rbd pool usually contains only rbd images, though. An object
created from an arbitrary file won't work as an rbd image. For rbd
images, you want e.g. "rbd import":
http://ceph.com/docs/master/man/8/rbd/

Re: How to write data to rbd pool.

[ramu eppa]

Hi all,

  How to know the rbd volume path.

Thanks,
Ramu.

Re: How to write data to rbd pool.

[Tommi Virtanen]

On Tue, Oct 2, 2012 at 6:13 AM, ramu eppa <ramu.freesystems@gmail.com> wrote:
>   How to know the rbd volume path.

Umm. What is an rbd volume path? If you "rbd map" it, the block device
will be called /dev/rbd/<poolname>/<imagename> -- maybe that's what
you were looking for?

Re: How to write data to rbd pool.

[ramu eppa]

Hi Tommi Virtanen,

   Actually we know the rbd full path,we write some data directly to volume.
nova/volume1/<data>.


Thanks,
ramu.

Re: How to write data to rbd pool.

[ramu eppa]

Hi all,

   When map rbd to /dev it's giving error,
"rbd map /dev/mypool/mytest "

add failed: (22) Invalid argument
 
How to map rbd volume.Please help me.

Thanks,
Ramu.

Re: How to write data to rbd pool.

[Dan Mick]

Don't understand the question.  rbd images live, by default, in the rbd 
pool; the image namespace is flat, and there is no path.

On 10/02/2012 06:13 AM, ramu eppa wrote:
> Hi all,
>
>    How to know the rbd volume path.
>
> Thanks,
> Ramu.
>
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Re: How to write data to rbd pool.

[Dan Mick]

What tool/library/context are you using the string "nova/volume1/<data>" 
in?  What does <data> represent?  How was volume1 created?



On 10/02/2012 10:09 AM, ramu eppa wrote:
> Hi Tommi Virtanen,
>
>     Actually we know the rbd full path,we write some data directly to volume.
> nova/volume1/<data>.
>
>
> Thanks,
> ramu.
>
> --
> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>

Re: How to write data to rbd pool.

[Tommi Virtanen]

On Tue, Oct 2, 2012 at 9:55 PM, ramu eppa <ramu.freesystems@gmail.com> wrote:
>    When map rbd to /dev it's giving error,
> "rbd map /dev/mypool/mytest "

The syntax is "rbd map mypool/mytest".

http://ceph.com/docs/master/man/8/rbd/

Re: How to write data to rbd pool.

[ramu eppa]

Hi all,

 Thanks for replies,i got the solution.

Thanks,
Ramu.