- Single point of support - if you compare it to traditional SAN based storage vendors support
That's the reason I didn't have a chance and time to play with VMware VSAN so far but I'm getting lot of questions from colleagues, DELL partners, customers and folks from VMware community about the right DELL storage controller for VSAN which can be used on the latest DELL server generation.
DELL 13th server generation was unveiled September 8, 2014. Since then, there was not any DELL storage controller for DELL 13G servers officially supported by VMware for VSAN.
Today I have got information that DELL PERC H730 is officially supported by DELL and VMware for VSAN. For more information look here.This is really great info for VSAN early adapters planning to use DELL servers. One little advice to all VSAN enthusiasts ... If you are not going to use officially supported VSAN nodes or EVO:Rail appliance and you are designing your own VSAN cluster do it very carefully and don't forget to do PoC before or during design phase and perform design and operational validation tests (aka test plan) before putting VSAN into real production. Be sure you know something about queue depth of adapters (AQLEN) and disks (DQLEN).
If you build your own software defined storage then you are the storage architect with little bit higher risk and responsibility in comparison to classic storage system (this is my opinion). That's the risk of any modern (aka emerging) technology before it's become the commodity. On the other hand, this can be your added value to your customers and there are no doubts there are some benefits.
But never forget why "data centers" are so important and business critical? Because usually we have there very valuable data which must be always available with reasonable performance. Think about 99.999% storage up time with some reasonable response time (3-20ms) for expected IOPS workload.
I wish everybody lot of success with hyper converge systems like VSAN and leave a comment of your hopefully success stories and use cases. And I'm still looking forward for my first VSAN project :-)