Hi Mark, The read IOPs in "normal" operation was with bluefs_buffered_io=false somewhat about 1. And now with true around 2. So this seems slightly higher, but far away from any problem. While snapshot trimming the difference is enormous. with false: around 200 with true: around 10 scrubing read IOPs do not appear to be affected. They are around 100 IOPs I'am using librados to access my objects. So I don't know if this would be any different with rgw. Manuel On Fri, 7 Aug 2020 08:08:40 -0500 Mark Nelson <mnelson@xxxxxxxxxx> wrote: > It's quite possible that the issue is really about rocksdb living on > top of bluefs with bluefs_buffered_io and rgw causing a ton of OMAP > traffic. rgw is the only case so far where the issue has shown up, > but it was significant enough that we didn't feel like we could leave > bluefs_buffered_io enabled. In your case with a 14GB target per OSD, > do you still see significantly increased disk reads with > blufs_buffered_io=false? > > > Mark > > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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