Hello, On Wed, 20 Jan 2016 10:01:19 +0100 Götz Reinicke - IT Koordinator wrote: > Hi folks, > > we plan to use more ssd OSDs in our first cluster layout instead of SAS > osds. (more IO is needed than space) > > short question: What would influence the performance more? more Cores or > more GHz/Core. > > Or is it as always: Depeds on the total of > OSDs/nodes/repl-level/etc ... :) > While there certainly is a "depends" in there, my feeling is that faster cores are more helpful than many, slower ones. And this is how I spec'ed my first SSD nodes, 1 fast core (Intel, thus 2 pseudo-cores) per OSD. The reasoning is simple, an individual OSD thread will run (hopefully) on one core and thus be faster, with less latency(!). > If needed, I can give some more detailed information on the layout. > Might be interesting for other sanity checks, if you don't mind. Regards, Christian -- Christian Balzer Network/Systems Engineer chibi@xxxxxxx Global OnLine Japan/Rakuten Communications http://www.gol.com/ _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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