> Hi! > > I've confirmed that the write IO to the metadata pool is coming form active MDSes. > > I'm experiencing very poor write performance on clients and I would like to see if there's anything I can do to optimise the performance. > > Right now, I'm specifically focussing on speeding up this use case: > > In CephFS mounted dir: > > $ time unzip -q wordpress-seo.12.9.1.zip > > real 0m47.596s > user 0m0.218s > sys 0m0.157s > > On RBD mount: > > $ time unzip -q wordpress-seo.12.9.1.zip > > real 0m0.176s > user 0m0.131s > sys 0m0.045s > > The difference is just too big. I'm having real trouble finding a good reference to check my setup for bad configuration etc. > > I have network bandwidth, RAM and CPU to spare, but I'm unsure on how to put it to work to help my case. Are there a lot of directories to be created from that zip file? I think it boils down to the directory operations that need to be performed synchrously. See https://fosdem.org/2020/schedule/event/sds_ceph_async_directory_ops/ https://fosdem.org/2020/schedule/event/sds_ceph_async_directory_ops/attachments/slides/3962/export/events/attachments/sds_ceph_async_directory_ops/slides/3962/async_dirops_cephfs.pdf https://video.fosdem.org/2020/H.1308/sds_ceph_async_directory_ops.webm Gr. Stefan -- | BIT BV https://www.bit.nl/ Kamer van Koophandel 09090351 | GPG: 0xD14839C6 +31 318 648 688 / info@xxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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