On Fri, 2013-06-07 at 07:15 +0200, Andy wrote: > One question I have is did you precondition the SSD ( > http://www.sandforce.com/userfiles/file/downloads/FMS2009_F2A_Smith.pdf )? > SSD performance tends to take a very deep dive once all blocks are written at > least once and the garbage collector kicks in.
Not explicitly so. The machine is our test server with the SSDs in RAID 0 with - to my knowledge - no TRIM support. They are 2½ year old and has had a fair amount of data written and being 3/4 full most of the time. At one point in time we experimented with 10M+ relatively small files and a couple of 40GB databases, so the drives are definitely not in pristine condition. Anyway, as Solr searches is heavy on tiny random reads, I suspect that search performance will be largely unaffected by SSD fragmentation. It would be interesting to examine, but for now I cannot prioritize another large performance test. Thank you for your input. I will update the blog post accordingly, Toke Eskildsen, State and University Library, Denmark
