[LU-12239] Unable to disable DOM

• Type: Bug
• Resolution: Not a Bug
• Priority: Blocker
• Affects Version/s: Lustre 2.12.0
• Environment: CentOS 7.6
• Severity: 3
• Assignee: WC Triage
• Reporter: Stephane Thiell

Description

I'm unable to disable dom when PFL is used. I followed http://doc.lustre.org/lustre_manual.xhtml#dbdoclet.disabledom

[root@fir-hn01 sthiell.root]# clush -w@mds 'lctl get_param lod.*MDT000*.dom_stripesize'
fir-md1-s1: lod.fir-MDT0000-mdtlov.dom_stripesize=0
fir-md1-s1: lod.fir-MDT0002-mdtlov.dom_stripesize=0
fir-md1-s2: lod.fir-MDT0001-mdtlov.dom_stripesize=0
fir-md1-s2: lod.fir-MDT0003-mdtlov.dom_stripesize=0

 
But the DOM component is not removed from the layout:

[root@fir-rbh01 fir]# dd if=/dev/zero of=test bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.31152 s, 337 MB/s
[root@fir-rbh01 fir]# 
[root@fir-rbh01 fir]# 
[root@fir-rbh01 fir]# lfs getstripe test
test
  lcm_layout_gen:    8
  lcm_mirror_count:  1
  lcm_entry_count:   6
    lcme_id:             1
    lcme_mirror_id:      0
    lcme_flags:          init
    lcme_extent.e_start: 0
    lcme_extent.e_end:   131072
      lmm_stripe_count:  0
      lmm_stripe_size:   131072
      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: 131072
    lcme_extent.e_end:   16777216
      lmm_stripe_count:  1
      lmm_stripe_size:   4194304
      lmm_pattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: 2
      lmm_objects:
      - 0: { l_ost_idx: 2, l_fid: [0x100020000:0x2e8c62:0x0] }

    lcme_id:             3
    lcme_mirror_id:      0
    lcme_flags:          init
    lcme_extent.e_start: 16777216
    lcme_extent.e_end:   1073741824
      lmm_stripe_count:  2
      lmm_stripe_size:   4194304
      lmm_pattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: 25
      lmm_objects:
      - 0: { l_ost_idx: 25, l_fid: [0x100190000:0x2e8b4b:0x0] }
      - 1: { l_ost_idx: 32, l_fid: [0x100200000:0x2e8c82:0x0] }

    lcme_id:             4
    lcme_mirror_id:      0
    lcme_flags:          0
    lcme_extent.e_start: 1073741824
    lcme_extent.e_end:   34359738368
      lmm_stripe_count:  4
      lmm_stripe_size:   4194304
      lmm_pattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: -1

    lcme_id:             5
    lcme_mirror_id:      0
    lcme_flags:          0
    lcme_extent.e_start: 34359738368
    lcme_extent.e_end:   274877906944
      lmm_stripe_count:  8
      lmm_stripe_size:   4194304
      lmm_pattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: -1

    lcme_id:             6
    lcme_mirror_id:      0
    lcme_flags:          0
    lcme_extent.e_start: 274877906944
    lcme_extent.e_end:   EOF
      lmm_stripe_count:  16
      lmm_stripe_size:   4194304
      lmm_pattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: -1