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Thanks everyone. I now get the difference between Lunr, nova-volume and 
glance. Section 7.7 in Cactus Compute Admin Guide didnt have much info on 
support for Ceph, AoE and Sheepdog, so I understood it only supported iSCSI.

-Shehjar

Devin Carlen wrote:
> On Jun 6, 2011, at 3:17 AM, FUJITA Tomonori wrote:
> 
>> On Mon, 6 Jun 2011 09:59:19 +0000
>> Shehjar Tikoo <shehjart at gluster.com> wrote:
>>
>>> It is not very clear to me whether Lunr will be a replacement for
>>> Glance 
>> I don't think so.
> 
> Glance is the image store which uses s3/swift api's to store machine images.  Lunr is an effort to take the block volume code that is currently in nova and separate it into it's own more generic service.
> 
>>> or will only be used for supporting application volumes.
>> I'm not sure the meaning of application volumes but it's a replacement
>> of the current nova-volume, provinding volume service for VMs.
> 
> Yep, exactly.  I believe Shehjart was referring to EBS style block storage, which nova-volume currently provides (and Lunr will replace in the future most likely).
> 
>>
>>> If I
>>> understand this correct, it is trying to overcome the iscsi-only
>>> access method currently provided for creating and accessing
>>> application volumes. Correct?
>> nova-volume already supports non iSCSI protocols, AOE, Sheepdog, Ceph
>> RBD. I think that you start working on GlusterFS integration with
>> nova-volume right now. You can work with Lunr later (when it's
>> released).
> 
> 
> Agreed - it seems most reasonable to begin this work in nova-volume and then add support to Lunr when it is closer to being ready for prime time.
> 
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