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Recently we replaced a server in which the data has been copied over via rsync. Afterwards, we are seeing the cleaner thread is not cleaning properly. We can see the DB has to clean ~200 GB of obsolete data and the server is super busy (~100 MB/sec I/O against the storage). This is going on since last four days, but we do not see any difference ins storage utilization. The BDB cleaner backlog is constant and no backlog in delete files.
Checked file permission and do not see any issue. Not sure, if there is any hidden files that cleaner thread is depending on to clean which might have lost during the rsync. Any other pointers?