New problem (unsure, but probably not observed in Hammer, but sure in Infernalis): copying large (tens g) files into kernel cephfs (from outside of cluster, iron - non-VM, preempt kernel) - make slow requests on some of OSDs (repeated range) - mostly 3 Gbps channels (slow).
All OSDs default threads numbers. Scheduler=noop. size=3 min_size=2 No same problem with fuse. Looks like broken or unbalanced congestion mechanism or I don't know how to moderate it. write_congestion_kb trying low (=1) - nothing interesting. -- WBR, Dzianis Kahanovich AKA Denis Kaganovich, http://mahatma.bspu.unibel.by/ _______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
