[LU-13611] DoM component inherited from parent/ROOT does not honor lod.*.dom_stripesize limit

Duplicate — Tue, 5 Oct 2021 20:56:35 +0000

It appears that if lod.*.dom_stripesize is set on the MDT, then it prevents setting new explicit/default layouts on files/directories via "lfs setstripe", but it does not affect the inheritance of DoM components from parent/ROOT default layouts. The following commands show this:

$ lfs setstripe -E 1M -L mdt -E eof -c 1 /mnt/testfs
$ lctl set_param lod.*.dom_stripesize=64K
$ touch /mnt/testfs/dom
$ lfs getstripe /mnt/testfs/dom

The dom file is created with a 1MB DoM component instead of a 64KB DoM component.

I wonder if it makes sense to use the new "lod.*.dom_stripesize_max_kb" parameter to control the maximum amount of space for DoM components as they are created, while the older "lod.*.dom_stripesize" parameter would control what the maximum DoM component size can be specified by "lfs setstripe"? Alternately, we could just consider this existing behavior as a bug and change new files to be limited to "dom_stripesize" regardless of where the parameter came from.

Whamcloud Community JIRA

[LU-13611] DoM component inherited from parent/ROOT does not honor lod.*.dom_stripesize limit