[lustre-discuss] Files created in append mode don't obey directory default stripe count

[Otto, Frank]

See subject. Is it a known issue? Is it expected? Easy to reproduce:


# lfs getstripe .
.
stripe_count:  4 stripe_size:   1048576 pattern:       raid0 stripe_offset: -1

# echo > aaa
# echo >> bbb
# lfs getstripe .
.
stripe_count:  4 stripe_size:   1048576 pattern:       raid0 stripe_offset: -1

./aaa
lmm_stripe_count:  4
lmm_stripe_size:   1048576
lmm_pattern:       raid0
lmm_layout_gen:    0
lmm_stripe_offset: 0
        obdidx           objid           objid           group
             0            2830          0xb0e                0
             1            2894          0xb4e                0
             2            2831          0xb0f                0
             3            2895          0xb4f                0

./bbb
lmm_stripe_count:  1
lmm_stripe_size:   1048576
lmm_pattern:       raid0
lmm_layout_gen:    0
lmm_stripe_offset: 4
        obdidx           objid           objid           group
             4            2831          0xb0f                0



As you see, file "bbb" is created with stripe count 1 instead of 4.
Observed in Lustre 2.12.x and Lustre 2.15.4.

Thanks,
Frank

--
Dr. Frank Otto
Senior Research Infrastructure Developer
UCL Centre for Advanced Research Computing
Tel: 020 7679 1506
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