New Feature in 2008 R2 – Cluster Shared Volumes

This week, Microsoft is announcing that Windows 2008 R2 will add a new feature to Failover Clusters called “Cluster Shared Volumes (CSV)”. This feature is being introduced so that they can support the Live Migration feature for Hyper-V. You can get more details about CSV and other 2008 R2 features in the following document:

Windows Server 2008 R2 (Beta) Reviewers Guide –

They are giving sessions about this at WINHEC and TechEd EMEA this week. Unfortunately, I won’t be attending these, but it’ll be really interesting to see where this goes in the future. This certainly gives you an idea of where Microsoft might be heading for future releases of Windows. It seems to me that they’ll be heading towards a “shared everything” model in the future, stacking NLB and perhaps Compute cluster all in one massive cluster solution.

In talking with the cluster team, they don’t currently plan to support this feature in a multi-site cluster environment…it’s not yet clear why. Perhaps it has something to do with possible network latency between the nodes. I’ll post more about this as I get the details.

EMC Cluster Enabler Updates

It’s been a really busy month for us. This past month, EMC has released a new version of SRDF/CE, MV/CE and internally announced a new addition to the Cluster Enabler family. I don’t think it’s been publicly announced, so I’ll have to refrain from posting any details on the third item at this time.


SRDF/CE and MV/CE version 3.1 are now available for download on EMC’s Powerlink website. Here are the new features in these releases:



SRDF/CE v3.1 

  • Hyper-V “host clustering” support. Not really a new feature…this is more of a qualification effort to ensure that this works.
  • VMware support. SRDF/CE 3.1 supports ESX 3.0.2 and 3.5 update 1 or higher.
  • Re-namable sites. In 3.1, you can now customize the Site name values in the Cluster Enabler GUI.
  • Thin provisioning support. 3.1 supports using thin R1/R2 devices


MV/CE 3.1 

  • CLARiiON AX4-5 array support. Support added for the Clariion AX-5 arrays running FLARE 2.23 
  • MirrorView/Asynchronous support. Keep in mind that MV/A only supports a max of 50 consistency groups currently
  • Hyper-V “host clustering” support. Again, not really a new feature but now fully tested/qualified
  • Re-namable sites. It’s not documented, but this is also new feature in MV/CE 3.1.


More details about these new features can be found in the product guides and release notes.