Howdy guys, we noticed a massive latency increase on object copy since the pacific release. Prior pacific the copy operation finished in always less than a second. The reproducer is quite simple: ``` s3cmd mb s3://moo truncate -s 10G moo.img s3cmd put moo.img s3://moo/hui --multipart-chunk-size-mb=5000 # expect the time to be less than a second (at least for our env) # there is a huge gap between latest and latest-octopus ) time s3cmd modify s3://moo/hui --add-header=x-amz-meta-foo3:Bar ``` We followed the developer instructions to spin-up the cluster and bisected the following commit. https://github.com/ceph/ceph/commit/99f7c4aa1286edfea6961b92bb44bb8fe22bd599 I'm not that involved to easily identify the cause from this commit, so it looks more or less like the issue were introduced earlier it's just getting used after the wide refactoring. Cheers, Tim
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