We moved from Compellent to Tegile last year. Tegile compression and dedupe work as advertised and its a solid product. It really shines with VM and in VDI implementations. If you're planning to throw a wide variety of IO patterns at a single Tegile array - VM + SQL + Exchange + Fileshares all on the same array you'll want to do a rather extensive trial because we had issues getting SQL performance where we wanted it to be. There have been several dot releases of the code since we went live and they now have a nice set of docs for best practice cfgs for SQL but there is no substitute for running it in your environment if that can be arranged. A lot of the Tegile folks came from Compellent and they're a nice bunch of people to deal with.
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