So, I'm in the process of trying to migrate our rgw.buckets.data pool from a replicated rule pool to an erasure coded pool. I've gotten the EC pool set up, good EC profile and crush ruleset, pool created successfully, but when I go to "rados cppool xxx.rgw.buckets.data xxx.rgw.buckets.data.new", I get this error after it transfers 4GB of data:

error copying object: (2) No such file or directory
error copying pool xxx.rgw.buckets.data => xxx.rgw.buckets.data.new: (2) No such file or directory

Is "rados cppool" still the blessed way to do the migration, or has something better/not deprecated been developed that I can use?

Thanks,

Mac