Performance of the production LUNs is dependent on the write performance of the Reserve LUN Pool when snapshots and/or Mirrorview/A is in use.  That being the case, I prefer the Reserve LUN Pool to be on Traditional RAID Groups with RAID10 protection if possible.  Obviously, the performance requirements will vary depending on your overall workload.  If you have high write activity on the production LUN, then you will see more writes to the Reserve LUN Pool and disk bottlenecksin the RLP will slow down the production LUN.  If your production LUN has mostly read and little or no write activity, then the RLP performance won't matter as much or at all.  Short Answer: Disk size/type/speed/qty and RAID Type being equal, traditional RAID Groups will always outperform Pools as there is less overhead.  Use Traditional RAID Groups for RLP LUNs if possible.
We are migrating from older CX3-480 arrays to a new CX4-960 running flare 30 and FAST with ssd's for fast cache. Is it beneficial to set up a pool for reserved luns (for snapview purposes) or use a standard raidgroup? I'm planning on keeping the disks for the reserved lun pool separate from the production luns.
flare 30 reserved lun pool best practices