Dear All, I am noticing large number of sync requests originating from the jobs. And I am trying to understand the numbers. I handpicked a few below from the output of "lctl get_param mdt.scratch-MDT0000.job_stats" from MDS. Strangely when I run try to get job_stats from all OSS for all OST's I don't see these high sync requests, rather it is 0. My question why would I see these many sync requests, even if it is cumulative it is high for a job that runs for couple of hours at the most. Can any body please shed some light on what I am seeing here? Thank you, Amit - job_id: 7819402 snapshot_time: 1455722134 open: { samples: 632, unit: reqs } close: { samples: 484, unit: reqs } mknod: { samples: 0, unit: reqs } link: { samples: 0, unit: reqs } unlink: { samples: 0, unit: reqs } mkdir: { samples: 0, unit: reqs } rmdir: { samples: 0, unit: reqs } rename: { samples: 0, unit: reqs } getattr: { samples: 58, unit: reqs } setattr: { samples: 0, unit: reqs } getxattr: { samples: 0, unit: reqs } setxattr: { samples: 0, unit: reqs } statfs: { samples: 0, unit: reqs } sync: { samples: 1183934, unit: reqs } samedir_rename: { samples: 0, unit: reqs } crossdir_rename: { samples: 0, unit: reqs } - job_id: 7819409 snapshot_time: 1455722644 open: { samples: 738, unit: reqs } close: { samples: 572, unit: reqs } mknod: { samples: 0, unit: reqs } link: { samples: 0, unit: reqs } unlink: { samples: 0, unit: reqs } mkdir: { samples: 0, unit: reqs } rmdir: { samples: 0, unit: reqs } rename: { samples: 0, unit: reqs } getattr: { samples: 66, unit: reqs } setattr: { samples: 0, unit: reqs } getxattr: { samples: 0, unit: reqs } setxattr: { samples: 0, unit: reqs } statfs: { samples: 0, unit: reqs } sync: { samples: 1396655, unit: reqs } samedir_rename: { samples: 0, unit: reqs } crossdir_rename: { samples: 0, unit: reqs }