[lustre-discuss] [EXTERNAL] lfs getstripe incomplete output

[Mohr, Rick]

John,

I believe that is the expected behavior.  The getstripe command will list all the components, but the "lmm_objects:" section won't show osts for any components that have not been instantiated.  Although your stripe pattern explicitly lists the osts for the second component, those objects haven't been allocated yet. The second component does show " lmm_stripe_offset: 2" which matches with first ost index in the option "--ost=2,1", but there is info about the stripe layout that is not displayed with the getstripe command.

--Rick


On 4/1/26, 9:22 AM, "lustre-discuss on behalf of John Bauer via lustre-discuss" <lustre-discuss-bounces at lists.lustre.org> wrote:


All,
I am applying a 2 component striping, including specifying the osts, to a file with an lfs setstripe command. When I issue the lfs getstripe command on the resulting file, the osts for the 2nd component are not displayed even though they were explicitly set. I have written my own program to get the striping information using the llapi functions and it reports the explicitly set osts are in the 2nd component. It would appear that lfs getstripe is not displaying osts in components that start beyond the file size, assuming those components have not been instantiated. Is this the desired behavior. 
John

#!/bin/bash -v

file=/hpelustre/e63414/test.dat

rm -f ${file}

lfs setstripe \
-E 10M \
--stripe-count=2 \
--stripe-size=1M \
--ost=3,4 \
-E EOF \
--stripe-count=2 \
--stripe-size=4M \
--ost=2,1 \
${file}

lfs getstripe ${file}


Resulting output:


lfs getstripe ${file}
/hpelustre/e63414/test.dat
lcm_layout_gen: 2
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: 10485760
lmm_stripe_count: 2
lmm_stripe_size: 1048576
lmm_pattern: raid0
lmm_layout_gen: 0
lmm_stripe_offset: 3
lmm_objects:
- 0: { l_ost_idx: 3, l_fid: [0x100030000:0x971473:0x0] }
- 1: { l_ost_idx: 4, l_fid: [0x100040000:0x9711c9:0x0] }
lcme_id: 2
lcme_mirror_id: 0
lcme_flags: 0
lcme_extent.e_start: 10485760
lcme_extent.e_end: EOF
lmm_stripe_count: 2
lmm_stripe_size: 4194304
lmm_pattern: raid0
lmm_layout_gen: 0
lmm_stripe_offset: 2