The other day I was designing and implementing an all new NetApp FAS3250 setup running Clustered ONTAP 8.2 supporting a vSphere environment. This setup contains a bunch of SAS 10K disks and a DS2246 shelf filled with 24x 200GB SSD’s.
Because of the requirements stated by the customer, most of the SSD’s are used for a SSD-only aggregate. But to accelerate the SAS disks, we opted to use 6 SSD’s to create a Flashpool. I guess Flashpool doesn’t need any further detailed introduction. It is a mechanism used by NetApp to utilize SSD’s to automatically cache random reads and random overwritten writes in a dedicated Flashpool aggregate. Note the bold ‘overwritten’! This cached data is available during a takeover or giveback.
Although the implementation of a Flashpool is pretty straight forward, there are a few things I would like to point out. Things I encountered during the implementation: