« The VMware View Of Software Defined Storage | Main | What's Really Driving SDDC »

August 26, 2013



strange how this has been going on for a few years now with a much more mature product with fuller feature set and is actually in production across the globe. its called nutanix and it has things like auto-tieriing, dedup, unlimited scalability, multiple hypervisor support, etc.

this looks a little dated.


Chuck - I'm with Virident Systems, PCIe enterprise sever-side flash provider and OEM to EMC XtremSF and Seagate X8 products. I see the requirement for at least 1 SSD and 1 SAS disk drive yet can VSAN clusters be comprised of all SSD (specifically PCIe)? PCIe for both caching and persistent storage?

Chuck Hollis

From what I know, the answers are (1) yes -- PCIe, and (2) no, not in the first version, as VSAN uses flash for caching and not persistent storage.

Although it might be interesting to see what happens when you load up a config with SSDs pretending to be spinning disks :)

-- Chuck

Dael Sutton

Hi Chuck. How does this compare to what Nutanix is doing with their VMware server boxes & shared storage. From what I read this sounds very similar.

Chuck Hollis

Hi Dael

The answer is "I don't know". I haven't been able to tease out the finer points of what Nutanix does and doesn't do, so it would only be speculation on my part.

-- Chuck

Chad Sakac

Disclosure, EMCer here.

Chuck - thank (and again, congrats on the new gig). I've been fortunate to have been using Virtual SAN (VSAN) in beta for some time.

Super simple, and cool.

A few observations:

1) There is a need for 2 or more copies in the cluster
2) Storage cost/density in a server is not super hot (not intrinsic, but is the case now)
3) There is a licensing cost.

You know market economics for the storage vendor world - will be interesting how this works out. By *my* math (warning this could be wrong), this is not dislike the EUC world: it's NOT about CAPEX, but OPEX (simpler operating mode).

Of course, this all presumes VSAN core code quality that is not materially bad (which I don't)

Varinder Rajoria

Hi Chuck,

Is VSAN and term virtual fabric are same ?

and wondering where I can find the performance result with and without virtual fabric technology in data centre.

If you can please help :-)

Chuck Hollis

Hi Varinder

They are different concepts, and not much related.

VSAN is a shared storage architecture that uses clustered server resources to do largely what a traditional external array does.

I'm not entirely sure what "virtual fabric" you are referring to.

A virtual fabric can be defined many different ways, usually involving establishing a software-defined network over an existing physical network.

If you can share with me what you're referring to, perhaps I can be more specific?

-- Chuck


The post mentions a price of $79 per desktop cost for VDI storage. I wonder if someone with some free time on their hands can extrapolate that back to a guestimated cost for the vSAN licensing?

The comments to this entry are closed.

Chuck Hollis

  • Chuck Hollis
    SVP, Oracle Converged Infrastructure Systems

    Chuck now works for Oracle, and is now deeply embroiled in IT infrastructure.

    Previously, he was with VMware for 2 years, and EMC for 18 years before that, most of them great.

    He enjoys speaking to customer and industry audiences about a variety of technology topics, and -- of course -- enjoys blogging.

    Chuck lives in Vero Beach, FL with his wife and four dogs when he's not traveling. In his spare time, Chuck is working on his second career as an aging rock musician.

    Warning: do not ever buy him a drink when there is a piano nearby.

    Note: these are my personal views, and aren't reviewed or approved by my employer.
Enter your Email:
Preview | Powered by FeedBlitz

General Housekeeping

  • Frequency of Updates
    I try and write something new 1-2 times per week; less if I'm travelling, more if I'm in the office. Hopefully you'll find the frequency about right!
  • Comments and Feedback
    All courteous comments welcome. TypePad occasionally puts comments into the spam folder, but I'll fish them out. Thanks!