[LU-10285] Make sure that FLR is able to extend a plain file on older file system

• Status: Resolved
• Project: Lustre
• Affects Version/s: Lustre 2.11.0
• Type: Technical task
• Priority: Blocker
• Reporter: Jinshan Xiong (Inactive)
• Assignee: Sarah Liu
• Resolution: Done
• Labels: FLR

Description

Now lfs mirror extend should be able to extend a plain file to mirrored file by using command like:

lfs mirror extend -N2 -E 1M -E eof -c 2 file

while 'file' is a file with plain layout. This has already been verified in FLR branch, please check the test case sanity-flr:test_0d().

We also need to verify this command works on an older file system. For example, a file system is formatted in 2.10, and then create regular files with plain and PFL layout in it, and then upgrade Lustre to 2.11, and then use the above command to convert plain files to mirrored, which should work fine.

Comments

[Sarah Liu]

Tested this scenario and it passed.
Here are the steps
1. setup system as 2.10.2 #51 ldiskfs, create 2 file, 1 is plain, 1 is PFL

[root@onyx-77 lustre]# lfs getstripe foo-plain 
foo-plain
lmm_stripe_count:  1
lmm_stripe_size:   1048576
lmm_pattern:       1
lmm_layout_gen:    0
lmm_stripe_offset: 0
	obdidx		 objid		 objid		 group
	     0	             4	          0x4	             0

[root@onyx-77 lustre]# lfs getstripe foo-pfl 
foo-pfl
  lcm_layout_gen:  3
  lcm_entry_count: 2
    lcme_id:             1
    lcme_flags:          init
    lcme_extent.e_start: 0
    lcme_extent.e_end:   1048576
      lmm_stripe_count:  1
      lmm_stripe_size:   1048576
      lmm_pattern:       1
      lmm_layout_gen:    0
      lmm_stripe_offset: 1
      lmm_objects:
      - 0: { l_ost_idx: 1, l_fid: [0x100010000:0x5:0x0] }

    lcme_id:             2
    lcme_flags:          init
    lcme_extent.e_start: 1048576
    lcme_extent.e_end:   EOF
      lmm_stripe_count:  1
      lmm_stripe_size:   1048576
      lmm_pattern:       1
      lmm_layout_gen:    0
      lmm_stripe_offset: 0
      lmm_objects:
      - 0: { l_ost_idx: 0, l_fid: [0x100000000:0x5:0x0] }

[root@onyx-77 lustre]# 

2. Upgrade the system to 2.11 #3677 without format
3. run the above extend command on both files

[root@onyx-77 lustre]# lfs getstripe foo-plain 
foo-plain
  lcm_layout_gen:    2
  lcm_mirror_count:  3
  lcm_entry_count:   5
    lcme_id:             65537
    lcme_flags:          init
    lcme_extent.e_start: 0
    lcme_extent.e_end:   EOF
      lmm_stripe_count:  1
      lmm_stripe_size:   1048576
      lmm_pattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: 0
      lmm_objects:
      - 0: { l_ost_idx: 0, l_fid: [0x100000000:0x4:0x0] }

    lcme_id:             131073
    lcme_flags:          init
    lcme_extent.e_start: 0
    lcme_extent.e_end:   1048576
      lmm_stripe_count:  1
      lmm_stripe_size:   1048576
      lmmattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: 1
      lmm_objects:
      - 0: { l_ost_idx: 1, l_fid: [0x100010000:0x22:0x0] }

    lcme_id:             131074
    lcme_flags:          0
    lcme_extent.e_start: 1048576
    lcme_extent.e_end:   EOF
      lmm_stripe_count:  2
      lmm_stripe_size:   1048576
      lmm_pattern:       raid0
      lmm_layout_gen:    65535
      lmm_stripe_offset: -1

    lcme_id:             196609
    lcme_flags:          init
    lcme_extent.e_start: 0
    lcme_extent.e_end:   1048576
      lmm_stripe_count:  1
      lmm_stripe_size:   1048576
      lmm_pattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: 0
      lmm_objects:
      - 0: { l_ost_idx: 0, l_fid: [0x100000000:0x22:0x0] }

    lcme_id:             196610
    lcme_flags:          0
    lcme_extent.e_start: 1048576
    lcme_extent.e_end:   EOF
      lmm_stripe_count:  2
      lmm_stripe_size:   1048576
      lmm_pattern:       raid0
      lmm_layout_gen:    65535
      lmm_stripe_offset: -1

[root@onyx-77 lustre]# lfs getstripe foo-pfl
foo-pfl
  lcm_layout_gen:    2
  lcm_mirror_count:  3
  lcm_entry_count:   6
    lcme_id:             65537
    lcme_flags:          init
    lcme_extent.e_start: 0
    lcme_extent.e_end:   1048576
      lmm_stripe_count:  1
      lmm_stripe_size:   1048576
      lmm_pattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: 1
      lmm_objects:
      - 0: { l_ost_idx: 1, l_fid: [0x100010000:0x5:0x0] }

    lcme_id:             65538
    lcme_flags:          init
    lcme_extent.e_start: 1048576
    lcme_extent.e_end:   EOF
      lmm_stripe_count:  1
      lmm_stripe_size:   1048576
      lmm_pattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: 0
      lmm_objects:
      - 0: { l_ost_idx: 0, l_fid: [0x100000000:0x5:0x0] }

    lcme_id:             131073
    lcme_flags:          init
    lcme_extent.e_start: 0
    lcme_extent.e_end:   1048576
      lmm_stripe_count:  1
      lmm_stripe_size:   1048576
      lmm_pattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: 1
      lmm_objects:
      - 0: { l_ost_idx: 1, l_fid: [0x100010000:0x23:0x0] }

    lcme_id:             131074
    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: 0
      lmm_objects:
      - 0: { l_ost_idx: 0, l_fid: [0x100000000:0x23:0x0] }
      - 1: { l_ost_idx: 1, l_fid: [0x100010000:0x24:0x0] }

    lcme_id:             196609
    lcme_flags:          init
    lcme_extent.e_start: 0
    lcme_extent.e_end:   1048576
      lmm_stripe_count:  1
      lmm_stripe_size:   1048576
      lmm_pattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: 0
      lmm_objects:
      - 0: { l_ost_idx: 0, l_fid: [0x100000000:0x24:0x0] }

    lcme_id:             196610
    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: [0x100010000:0x25:0x0] }
      - 1: { l_ost_idx: 0, l_fid: [0x100000000:0x25:0x0] }

[Joseph Gmitter (Inactive)]

Test has been successful.