I'm doing some testing and wanted to see the effect of increasing journal speed, and the fastest way to do this seemed to be to put it on a ramdisk where latency should drop to near zero and I can see what other inefficiencies exist. I created a tmpfs of sufficient size, copied journal on to that, and started the OSD. It core dumped pretty quickly which I assume is related to direct io not being supported. I turned off journal dio and the osd started okay but never recovered. How should I do this? Is there another type of ramdisk I should use or other journal options I should specify? (and yes I understand that losing ramdisk will lose the osd - I'm just doing testing) Thanks James _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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