[lustre-discuss] lustre 2.5.3 ost not draining

Kurt Strosahl strosahl at jlab.org
Fri Jul 10 06:40:17 PDT 2015

I set it offline using lctl --device <device num> deactivate earlier in the week.  I then set it back online this morning using lctl --device <device num> activate  I let it sit in active mode for almost an hour, but then I noticed that the used space had gone up significantly on the ost, so I set it offline again using the above command to prevent it from reaching 100%


----- Original Message -----
From: "Patrick Farrell" <paf at cray.com>
To: "Kurt Strosahl" <strosahl at jlab.org>, lustre-discuss at lists.lustre.org
Sent: Friday, July 10, 2015 9:00:38 AM
Subject: RE: lustre 2.5.3 ost not draining


Did you deactivate the OST?  Deactivated OSTs do not show reduced usage until activated again.

- Patrick
From: lustre-discuss [lustre-discuss-bounces at lists.lustre.org] on behalf of Kurt Strosahl [strosahl at jlab.org]
Sent: Friday, July 10, 2015 7:27 AM
To: lustre-discuss at lists.lustre.org
Subject: [lustre-discuss] lustre 2.5.3 ost not draining

Good Morning,

   Earlier in the week some of the OSTs in the lustre 2.5.3 system I'm managing hit 97% full.  I set them to read only, and yesterday I started an lfs_migrate on one of them, hoping to drain it down overnight.  This morning, after the system spent about 12 hours moving files off of it, I set it to read-write mode.  I expected to see the usage drop, but it has yet to do so... after almost 30minutes in read-write mode.

On the oss I do see where it says it is deleting orphan objects.

Lustre: lustre2-OST0015: deleting orphan objects from 0x0:119789 to 0x0:119809

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