VMware Cloud Community
Wajeeh
Enthusiast
Enthusiast
‎05-22-2014 08:19 AM
Jump to solution

Storage vmotion between datastores when the block size is different

Hello All,

I would like to know, is it possible to do a storage vmotion between two datastores, when they are having different block sizes. The case is like there was an old vmfs 3 datastore which was upgraded live to vmfs5, but since it was upgraded it is maintaining its own block size. While the newly created vmfs 5 datastore is having 1MB block size.

So, storage Vmotion will work in this case ? will it fail OR will be done with degraded performance ?

Lastly storage vmotion is possible even if you don't have a Storage DRS cluster?

Thanks,

0 Kudos
1 Solution

Accepted Solutions
rcporto
Leadership
Leadership
‎05-22-2014 08:32 AM
Jump to solution

Yes you can!

Check some more info about block size impact: http://www.yellow-bricks.com/2011/02/18/blocksize-impact/

---

Richardson Porto
Senior Infrastructure Specialist
LinkedIn: http://linkedin.com/in/richardsonporto

View solution in original post

0 Kudos
3 Replies
rcporto
Leadership
Leadership
‎05-22-2014 08:32 AM
Jump to solution

Yes you can!

Check some more info about block size impact: http://www.yellow-bricks.com/2011/02/18/blocksize-impact/

---

Richardson Porto
Senior Infrastructure Specialist
LinkedIn: http://linkedin.com/in/richardsonporto
0 Kudos
vThinkBeyondVM
VMware Employee
VMware Employee
‎05-22-2014 11:20 PM
Jump to solution

Hi Friend,

Yes It will work fine. Refer : Above link that "richardson has specified. It is worth to read twice.

Also please understand difference between upgraded VMFs 5 and new VMFS 5: http://vinfrastructure.it/2011/12/vmfs5-upgrading-vs-fresh-install/

Yes, SVMotion just works fine even when you do not have SDRS. SDRS is only available in enterprise plus licenses which makes your manual efforts of workload (IO & Space) management/balancing automated.

In vSphere 5.1 , 5.5 m SVMOtion is available in very basic license.


----------------------------------------------------------------
Thanks & Regards
Vikas, VCP70, MCTS on AD, SCJP6.0, VCF, vSphere with Tanzu specialist.
https://vThinkBeyondVM.com/about
-----------------------------------------------------------------
Disclaimer: Any views or opinions expressed here are strictly my own. I am solely responsible for all content published here. Content published here is not read, reviewed or approved in advance by VMware and does not necessarily represent or reflect the views or opinions of VMware.

schepp
Leadership
Leadership
‎05-22-2014 11:28 PM
Jump to solution

the storage vMotion on datastores with different block sizes will work. But you will suffer in performance.

It's recommended to migrate your VMs from your upgraded VMFS5 datastores, delete it and make a fresh new VMFS5 datastore. You will get the best storage vMotion performance when all datastores have the same block size.

You can read this up in the Clustering Deepdive from Duncan Epping and Frank Denneman, also known as Clustering Bible Smiley Wink VMware vSphere 5.1 Clustering Deepdive (Volume 1): Duncan Epping, Frank Denneman: 9781478183419: Ama...

Regards

Tim