[sheepdog-users] runtime requirements?

[Andrew J. Hobbs]

qemu-nbd is a helper app in the qemu package.  You can then access them 
as normal from xen as an nbd provider.

On 03/13/2014 01:16 PM, Miles Fidelman wrote:
> Re. the iSCCI vs. NBD options:
>
> The iSCSI instructions are all based around standard iSCSI initiator 
> and target commands, but the documentation for NBD (such as it is) says;
>
> 1.
>
>    Create a Sheepdog image
>
>    $ qemu-img create sheepdog:image 4G
>
> 2.
>
>    Start qemu-nbd on the one of Sheepdog servers
>
>    $ qemu-nbd sheepdog:image
>
> Which suggests that one has to have qemu running to publish NBD 
> volumes - or is that just for mounting an NBD image from within a VM?  
> The key question: can I set up Sheepdog to publish an NBD volume, and 
> access it through native o/s or xen NBD drivers?
>
> Andrew: What's your environment look like (what's Sheepdog running on, 
> what kinds of virtualization environment, what kinds of VMs?).
>
> Thanks!
>
> Miles
>
>
> Andrew J. Hobbs wrote:
>> While I haven't personally had to use them in this case (yet).  I'd 
>> try the iSCSI or NBD options for sheepdog.   I routinely run 
>> benchmarks when trying new combinations, if you do for both of these 
>> situations, I'd be very interested in your results.
>>
>> I keep a linux image with a fully allocated disk to run benchmarks on 
>> with the below command.
>>
>>
>> dd if=/dev/zero of=/test.out bs=4k count=1000000 oflag=direct
>>
>>
>>
>> On 03/13/2014 10:58 AM, Miles Fidelman wrote:
>>
>> Since I'm running Xen paravirtualized (for speed in all cases, and 
>> for 2 servers, because they don't have
>> hardware virtualization available), QEMU based drivers aren't 
>> available - hence my reasons for not
>> being able to use Sheepdog in the past.
>>
>> iSCSI solves the problem.  So would NFS.
>>
>> Thanks!
>>
>> Miles
>>
>>
>>
>>
>>
>>
>>
>
>

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