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rgw/sfs: mark all OPEN versions DELETED on startup #234
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All OPEN versions that exist on startup are due to aborted uploads. Setting them to DELETED allows us to free up space leveraging the GC.
Tested by running
s3cmd --limit-rate 1000 put obj.1mb.bin s3://foo/slow
and hitting CTRL-C after a few seconds to leave an open object lying around, then restarting s3gw and looking for "marked 1 open objects deleted" in the debug logs.Fixes: https://github.com/aquarist-labs/s3gw/issues/624
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