Fri May 11, 2012 6:25 pm
Limitations of VMware VSA:
1. High price for VSA as an add-on to Plus.
2. No two-server solution (two-node solution requires third server.)
3. No four-node solution
4. Three-node solution recommends four servers (installing VCenter with VSA management inside VMware requires unusual contortions.)
5. No flexibility on node-level redundancy (Mirror only, workload is not balanced.)
6. No flexibility on hardware-level redundancy (RAID 10 only, 5 and 6 not supported.)
7. No add-on ability for existing clusters (must be configured at ESX install time, cannot be added under vSphere 4.)
8. Limited feature set (no dedupe, for example)
I, for example, have an exsting 3-server cluster running vSphere 4 with a high-quality SAN.
I'd like to create a second virtual SAN using the ESX servers' local storage for use with low-priority servers/test lab and backups, as part of a tired storage scheme.
VSA's limitations are severe in my case. I pay a lot of money for a product which will is non-trivial to incrementally ad, which will present, raw, 1/4 of the storage I purchase, and which cannot dedupe.