@Erick, Your revelation on SSDs is very valuable. Do you have any idea on the following ?
Does more processors with less cores or less processors with more cores i.e. which of 4P2C or 2P4C has best cost per query ? ~ Sourajit On Fri, Jun 7, 2013 at 4:45 PM, Erick Erickson <erickerick...@gmail.com>wrote: > 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 > > >
