Hello! Based on the documentation for defining quotas in CephFS for any directory (http://docs.ceph.com/docs/master/cephfs/quota/), I defined a quota for attribute max_bytes: ld4257:~ # getfattr -n ceph.quota.max_bytes /mnt/ceph-fuse/MTY/ getfattr: Removing leading '/' from absolute path names # file: mnt/ceph-fuse/MTY/ ceph.quota.max_bytes="100000000" To validate if the quota is working, I write a 128MB file in /mnt/ceph-fuse/MTY: ld4257:~ # dd if=/dev/zero of=/mnt/ceph-fuse/MTY/128MBfile bs=64M count=2 2+0 records in 2+0 records out 134217728 bytes (134 MB, 128 MiB) copied, 0.351206 s, 382 MB/s This file is created correctly, and the utilization statistcs confirm it: ld4257:~ # rados df pool name KB objects clones degraded unfound rd rd KB wr wr KB hdb-backup 131072 32 0 0 0 8 8 43251 88572586 hdb-backup_metadata 27920 27 0 0 0 301 168115 6459 55386 rbd 0 0 0 0 0 0 0 0 0 templates 0 0 0 0 0 0 0 0 0 total used 9528188 59 total avail 811829446772 total space 811838974960 Question: Why can I create a file with size 128MB after defining a quota of 100MB? THX _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com