EMC FAST Tiering and Cache first thoughts
This week we have deployed our first EMC CX with flare 30, FAST and SSD’s. The customer has a CX 240 with 5 x 100GB SSD’s, and a heap of 600GB Fibre Channel and 2TB SATA. Matt Taylor discussed his highlights and I thought I would add mine.
Existing RAID Groups, Storage Pools and LUN’s do not get fast cache enabled automatically when you load the enabler, but it is enabled by default for all new storage devices.
With traditional RAID Groups, FAST Cache is enabled on a per LUN basis. Storage pools FAST is enabled on the pool and not the LUN.
Monitor workloads specifically the Cache Miss Rate metric to idetify which workloads will most benefit from FAST cache.