[lustre-discuss] Unexpected result with overstriping
John Bauer
bauerj at iodoctors.com
Fri May 17 07:48:10 PDT 2024
Good morning all,
I am playing around with overstriping a bit and I found a behavior that,
to me, would seem unexpected. The documentation for -C -1 indicates
that the file should be striped over all available OSTs. The pool,
which happens to be the default, is ssd-pool which has 32 OSTs. I got a
stripeCount of 2000. Is this as expected?
pfe20.jbauer2 213> rm -f /nobackup/jbauer2/ddd.dat
pfe20.jbauer2 214> lfs setstripe -C -1 /nobackup/jbauer2/ddd.dat
pfe20.jbauer2 215> lfs getstripe /nobackup/jbauer2/ddd.dat
/nobackup/jbauer2/ddd.dat
lmm_stripe_count: 2000
lmm_stripe_size: 1048576
lmm_pattern: raid0,overstriped
lmm_layout_gen: 0
lmm_stripe_offset: 119
lmm_pool: ssd-pool
obdidx objid objid group
119 52386287 0x31f59ef 0
123 52347947 0x31ec42b 0
127 52734487 0x324aa17 0
121 52839396 0x32643e4 0
131 52742709 0x324ca35 0
116 52242659 0x31d28e3 0
117 51831125 0x316e155 0
124 52425218 0x31ff202 0
125 52402722 0x31f9a22 0
106 52700581 0x32425a5 0
edited for brevity
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