Re: Period of transition
Okay. I think you’re missing my point a little. For the record, decade + user of NetApp and long time fan. I’ve never recommended another top tier vendor in my life … but
You -[ “It doesn't cost any more to run cluster mode than 7 -mode aside form the cost of the cluster interconnect switch which is only needed when you have more than two nodes which many customers do not.” ]
I’m not saying that the CMODE or CDOT or Cluster Mode has a higher book price. My point is this, WAFL is getting on a bit now. A decade+ is a long time in IT. When you take a system like that and continually adapt to changing hardware and use case scenarios, you’re unlikely to match performance of systems that are designed specifically for the latest thing. Case in point, SSD. Are you telling me that Ontap/WAFL is the best solution for a hybrid disk array? Raid striping transient data in the flash pool / dedicating disks to parity / burning CPU cycles calculating parity etc? No, not really a great thing.
Is CDOT a good proposition? I like it in some respects and there are good features. But things like QOS for storage are not unique to this vendor. Take a look at Solidfire for a system that does it even better (mins and max – not just cap). NetApp cannot rely on bells and whistles to be winning key differentiators.
My main point is this – (and this isn’t just a dig at the big N because I’ve been a fan for years) – is WAFL able to scale with the hardware and deliver significant performance improvements over the next, say, 5 years? Looking at the FAS8240 series benchmark results on this site, I would say not. 30,000 iops more than a FAS3170 (and 30,000 IOPs in this day and age isn’t a huge deal for some of the new vendors coming online). In 5 years – that’s the performance improvement? The flagship storage node, beaten by a 5 year old 3Par array? So why not have doubts about what WAFL can deliver here. And if you follow that thought through - and consider binding yourself in to CDOT for the next 4 years – it then becomes a comparatively expensive proposition. All this at a time when the market is abstracting the bells and whistles away from the controller and sticking them in to software which can only lessen the demand for those features on array.
If you feel different about it , are happy with the performance and features then that’s great. You’re the master of your wallet – spend it how you like. Personally I’m not convinced and my gaze is drifting to the Nimbles and Tegiles that are materialising, and even more basic, cost effective server storage systems underpinning hypervisors and Openstack or serving software based storage. These are the game changers. Not CDOT although I wish NetApp best of luck returning to form.