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April 28, 2015


Glenn Sizemore

Hi Chuck, Great read as always! I wonder why you chose to accept SDS as the divide. Regardless of which camp someone may be in. SDS doesn't change at all when employed in a HCI model. The recently ratified SNIA definition for SDS accommodates both models.

The Split is at the infrastructure level. Are these HCI models ready/capable of fully supplanting the existing and arguably more mature Integrated/Converged Infrastructure solutions (FlexPod/VSPEX/vBlock/etc)? That particular debate is still centered on the operational efficiency, but doesn't acknowledge the efficiency trade offs that enable those operational savings. I'm very much in favor of this public conversation, but don't believe SDS has anything at all to do with it. Particularly when referring to the VMware ecosystems, vSphere 6 enables both deployment models to utilize the same operational model (VSAN/VVols).

I would expect you to continue to fight the good fight and educate. We need to move past the none-sense and get down to the real conversations, but we will never get there if we keep talking about stuff that doesn't actually matter, ala SDS. Everyone has it, its table stakes.


NetApp Employee

Mark Burgess

Hi Chuck,

For me VSAN is software-defined storage (SDS) and VVOLs is software-defined policy-based storage management – VVOLs is not SDS.

I just wish the industry could agree on what the term SDS actually means as every storage vendor claims their product is SDS when I think most people would clearly disagree with them.

I have tried to do it at http://blog.snsltd.co.uk/are-vmware-vsan-vvols-and-evorail-software-defined-storage-and-does-it-really-matter/

I would be interested in your thoughts.

Many thanks

Paula Alves

Market diversification for software-based storage products could be considered a good sign, since it brings more options to the table. However, at the organizational level, the question of HCI maturity for adaptation of new storage is relevant only when viewed in tandem with effects on efficiency. The introduction of more policy in a system that is already functioning efficiently may prove to be counterproductive, unless planned carefully.

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.
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