On Tue, Mar 10, 2015, at 03:52 PM, Matthew McGeary wrote: > We use SSD arrays for both our database > and our active log. That said, unless you are using TSM deduplication > or node replication, SSD disks should not be required for good server > performance. > Standard 15K SAS drives are more than sufficient for regular server > operations when dedup and replication are not used.
If you cannot have both on solid state, put the logs on rotating rust, it's mostly sequential I/O and works fine. Personally I cannot imagine myself deploying TSM databases on spinning disks anymore. If a TSM installation performs well on 15K disks, it is either really small or the disk array used for the DB contains so many spindles that I don't see how it can be any cheaper than SSD, or have any other benefit? Can you even say that 15K SAS drives are "standard" in this day and age?
