Thanks for this, hard data is always welcome! Another blog post for my reference list!
Erick On Fri, Jun 7, 2013 at 2:59 AM, Toke Eskildsen <t...@statsbiblioteket.dk> wrote: > 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 >
