Details
-
Bug
-
Resolution: Fixed
-
Minor
-
Lustre 2.12.0
-
9223372036854775807
Description
The DoM component size inherited from a parent or root directory is not limited by the current value of lod.*.dom_stripesize. That means any files created in a directory with a larger DoM layout created before the dom_stripesize is reduced will still be created with the larger DoM component size instead of being limited to dom_stripesize on that MDT:
client# lfs setstripe -E 1M -L mdt -E -1 -c 2 /mnt/testfs
mdt# lctl set_param lod.*.lod_stripesize=64K
lod.testfs-MDT0000-mdtlov.dom_stripesize=64K
lod.testfs-MDT0001-mdtlov.dom_stripesize=64K
client# dd if=/dev/zero of=/mnt/testfs/dd.2M bs=1M count=2
client# lfs getstripe /mnt/testfs/dd.2M
/mnt/testfs/dd.2M
lcm_layout_gen: 3
lcm_mirror_count: 1
lcm_entry_count: 2
lcme_id: 1
lcme_mirror_id: 0
lcme_flags: init
lcme_extent.e_start: 0
lcme_extent.e_end: 1048576
lmm_stripe_count: 0
lmm_stripe_size: 1048576
lmm_pattern: mdt
lmm_layout_gen: 0
lmm_stripe_offset: 0
lcme_id: 2
lcme_mirror_id: 0
lcme_flags: init
lcme_extent.e_start: 1048576
lcme_extent.e_end: EOF
lmm_stripe_count: 2
lmm_stripe_size: 1048576
lmm_pattern: raid0
lmm_layout_gen: 0
lmm_stripe_offset: 1
lmm_objects:
- 0: { l_ost_idx: 1, l_fid: [0x100010000:0x6:0x0] }
- 1: { l_ost_idx: 2, l_fid: [0x100020000:0x6:0x0] }
Inherited layouts should also be subject to dom_stripesize limiting on the MDS like lfs setstripe-specified layouts.
