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 }
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