[lustre-discuss] lustre 2.5.3 ost not draining

Kurt Strosahl strosahl at jlab.org
Sun Jul 12 15:02:25 PDT 2015

I just thought of a possible solution... to my over all problem.

What if I put every directory in a pool that avoided the 97% full osts, and the osts on the bad oss.  Then set everyone back to read write and turn the qos_rr back to 17%.  Now no new writes will land on the full / bad osts, but they will still be open for writes.  I can then drain down the osts using lfs_migrate and the space should go down accordingly.

It is a hack, but it solves my two major problems (the full osts not draining properly and the qos round robin being broken).


----- Original Message -----
From: "Sean Brisbane" <sean.brisbane at physics.ox.ac.uk>
To: "Kurt Strosahl" <strosahl at jlab.org>
Cc: "Shawn Hall" <shawn.hall at nag.com>, lustre-discuss at lists.lustre.org
Sent: Sunday, July 12, 2015 5:13:07 AM
Subject: RE: [lustre-discuss] lustre 2.5.3 ost not draining

Hi Kurt,

I was following the recommendation that the OST be active to allow the deletion to happen, hence the reactivation followed by mount/unmount is necessary to trigger the cleanup. The OST was therefore active during the mount/unmount.  


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