== sanityn test 77r: Change type of tbf policy at run time ========================================================== 04:30:00 (1713429000)
striped dir -i0 -c1 -H crush /mnt/lustre/d77r.sanityn
mds.MDS.mdt.nrs_policies=tbf uid
mds.MDS.mdt.nrs_tbf_rule=start md_rule uid={500} rate=1
mds.MDS.mdt.nrs_policies=tbf gid
mds.MDS.mdt.nrs_tbf_rule=start md_rule gid={500} rate=1
mds.MDS.mdt.nrs_policies=tbf jobid
mds.MDS.mdt.nrs_tbf_rule=start md_rule jobid={*.500} rate=1
mds.MDS.mdt.nrs_policies=tbf
mds.MDS.mdt.nrs_tbf_rule=start md_rule uid={500} rate=1
mds.MDS.mdt.nrs_policies=fifo
check the number of requests in queue:
    fifo: 0
    crrn: 0
    tbf: 0
    delay: 0
    fifo: 0
    crrn: 0
    tbf: 0
    delay: 0
cleanup 77r 22651
kill md_thread xargs