my new ssd (Intel X25-V, 40GB, 114€) is finally installed. i continue my collatz number crunching from 90 millions to 100 millions. Result : i'm cpu-bound again (1 core at 100%)
when the base was small enough to fit in ram it took ~10s to compute a block of 10k. now the db is ~22Go and it took more than a mn to compute a block of 10k on the raptor 10krpm. i moved the base to the ssd, then started the computation again. I'm back to ~10s per 10k. i'm running the windows monitor, while computing i have a mix of : - 1.5 MB/s read - 2.5 MB/s write The queue length on the ssd is at ~10% (while it was, of course, 100% on the raptor). A side note : When moving the DB from the raptor to the SSD, the ssd was the bottlenack, but it make sense : It's faster to sequentially read from a 10krpm than sequentially write on a cheap SSD. :) conclusion : TOTALLY ROCKS \o/ -- Laurent "ker2x" Laborde Sysadmin & DBA at http://www.over-blog.com/ _______________________________________________ Neo mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user
