Hello folks, We had an issue with the num_strays hit 1 million recently. As a workaround, max bal was increased to 125,000. The stray_num keeps growing at 25k per day. After a recent observation of 10TiB file deletion, the relevant application was stopped. Then we increased purging options to below values mds advanced filer_max_purge_ops 40 mds advanced mds_max_purge_files 1024 mds advanced mds_max_purge_ops 32768 mds advanced mds_max_purge_ops_per_pg 3 And run "du -hsx" to the top level directory mounted to the app that does massive deletion. Despite all above, strays still growing at 60K per day. There are a lot more applications using this CephFS filesystem and only this app is observed perform deletion at this scale. I'm wondering what would be the effective way to cleanup the strays in this situation while making the least impact to production. Note: We are on 14.2.6 thanks James Biao