During a maintenance window today I revooted the OSS that OST had been mounted on, after it came up the usage dropped significantly
________________________________ From: Iannetti, Gabriele <g.ianne...@gsi.de> Sent: Tuesday, February 16, 2021 10:02 AM To: Kurt Strosahl <stros...@jlab.org>; lustre-discuss@lists.lustre.org <lustre-discuss@lists.lustre.org> Subject: [EXTERNAL] Re: Disabling max creates and migrating data doesn't seem to be reducing the usage on an OST Hi Kurt, one more thing... The I-Node count should not increase, since new files should not be created on that OST. You can check the I-Node count with `lfs df -i | grep "\[OST:15\]"`. Modifications on existing files are still possible e.g. file increases in it's size... ~Gabriele ________________________________________ From: lustre-discuss <lustre-discuss-boun...@lists.lustre.org> on behalf of Kurt Strosahl <stros...@jlab.org> Sent: Thursday, February 11, 2021 16:51 To: lustre-discuss@lists.lustre.org Subject: [lustre-discuss] Disabling max creates and migrating data doesn't seem to be reducing the usage on an OST Good Morning, One of the OSTs in a lustre file system I manage is showing a higher usage. I attempted to stop writes by setting the max_create_count to zero and then moving data off it but that doesn't seem to be working. > lfs df | grep OST:15lustre19-OST000f_UUID 71145018368 62653382656 8491631616 > 89% /lustre19[OST:15] MDS> lctl set_param osp.lustre19-OST000f*.max_create_count=0 MDS> lctl get_param osp.lustre19-OST000f*.max_create_count losp.lustre19-OST000f-osc-MDT0000.max_create_count=0 lfs find /lustre19/expphy/volatile --ost lustre19-OST000f -size +50M | lfs_migrate -y I've been watching it, and the ost in question isn't shrinking. I can see its size usage go down a bit... and then tick up a bit w/r, Kurt J. Strosahl System Administrator: Lustre, HPC Scientific Computing Group, Thomas Jefferson National Accelerator Facility
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