Re: remote storage

[Eneko Lacunza <elacunza@xxxxxxxxx>]

Title: disclaimer

Hi Robert,

I don't see any reply to your email, so I send you my thoughts.

Ceph is all about using cheap local disks to build a large performant and resilient storage. Your use case with SAN and storwise doesn't seem to fit very well to Ceph. (I'm not saying it can't be done).

¿Why are you planning to use Ceph with a SAN? Why not use the SAN directly?

Cheers
Eneko

On 23/01/15 12:28, Robert Duncan wrote:

Hi All,

 

This is my first post, I have been using Ceph OSD in OpenStack Icehouse as part of the Mirantis distribution with Fuel – this is my only experience with Ceph, so as you can imagine – it works, but I don’t really understand all of the technical details, I am working for a college in Ireland and we are planning on deploying a larger private cloud this year using the Kilo release of OpenStack when it matures. I am architecting the physical components and storage has become quite complex – Currently we use a Dell Equallogic Array and we have configured the cinder service to use the driver provided by Dell, the nodes in the data centre don’t have a lot of local storage. So here is my Ceph ignorance laid bare

 

1-      I have enough compute nodes to run a ceph cluster, radosgw etc. as per http://ceph.com/docs/master/radosgw/

2-      I have no available local disks * - this is the problem

3-      I have a Dell Equallogic SAN and fabric (7.5k NL SAS)

4-      I have access to storage as a service from our ISP – this is an IBM storwise V7000- I can provision block storage and mount iscsi volumes, it’s across town but we have a p2p layer 2 connection

 

The use cases will be students on a Masters in data analytics using OpenStack Sahara and S3 for data sets. So if I mounted remote storage or network attached storage would it work? Can I put Ceph directly in front of my Equallogic array and use ceph for cinder, glance, nova and S3? Has anyone any thoughts or experience on this – thanks for taking the time to read this and any input would be greatly appreciated.

 

All the best,

Rob.

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