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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