Morning all, since Luminous/Mimic, Ceph supports allow_ec_overwrites. However, this has a performance impact that looks even worse than what I'd expect from a Read-Modify-Write cycle. https://ceph.com/community/new-luminous-erasure-coding-rbd-cephfs/ also mentions that the small writes would read the previous value from all k+m OSDs; shouldn't the k stripes be sufficient (assuming we're not currently degraded)? Is there any suggestion on how to make this go faster, or suggestions on which solution one could implement going forward? Regards, Lars -- SUSE Linux GmbH, GF: Felix Imendörffer, Mary Higgins, Sri Rasiah, HRB 21284 (AG Nürnberg) "Architects should open possibilities and not determine everything." (Ueli Zbinden) _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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