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On Feb 21, 2023, at 10:26, John Bauer <<a href="mailto:bauerj@iodoctors.com" class="">bauerj@iodoctors.com</a>> wrote:<br class="">
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<div class="">Something doesn't make sense to me when using lfs setstripe when specifying 0 for the stripe_count . This first command works as expected. The pool is the one specified, 2_hdd, and the -c 0 results in a stripe_count of 1 which I believe is the
default for the file-system default ( per the lfs setstripe manpage ).<br class="">
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pfe24.jbauer2 1224> lfs setstripe -c 0 -p 2_hdd /nobackupp18/jbauer2/testing/<br class="">
pfe24.jbauer2 1225> lfs getstripe -d /nobackupp18/jbauer2/testing/<br class="">
stripe_count: 1 stripe_size: 1048576 pattern: raid0 stripe_offset: -1 pool: 2_hdd<br class="">
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If I do not specify the pool and only specify the stripe_count as 0, the resulting striping is what I believe is the pfl striping from the root directory of the file system. Is this what is expected? I would expect a stripe_count of 1, as above, with the
pool from the parent directory's striping.<br class="">
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pfe24.jbauer2 1226> lfs setstripe -c 0 /nobackupp18/jbauer2/testing/<br class="">
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If you specify "-c 0" the "specified" file layout ends up being the same "all default values" as if nothing was specified for the layout at al (i.e. "-c 0 -i -1 -S 0")l, which results in the default filesystem layout being used. If any non-default value is
specified then the rest of the layout is filled in from the default values.</div>
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<div class="">pfe24.jbauer2 1227> lfs getstripe -d /nobackupp18/jbauer2/testing/<br class="">
lcm_layout_gen: 0<br class="">
lcm_mirror_count: 1<br class="">
lcm_entry_count: 3<br class="">
lcme_id: N/A<br class="">
lcme_mirror_id: N/A<br class="">
lcme_flags: prefer<br class="">
lcme_extent.e_start: 0<br class="">
lcme_extent.e_end: 268435456<br class="">
stripe_count: 1 stripe_size: 16777216 pattern: raid0 stripe_offset: -1 pool: ssd-pool<br class="">
<br class="">
lcme_id: N/A<br class="">
lcme_mirror_id: N/A<br class="">
lcme_flags: prefer<br class="">
lcme_extent.e_start: 268435456<br class="">
lcme_extent.e_end: 5368709120<br class="">
stripe_count: -1 stripe_size: 16777216 pattern: raid0 stripe_offset: -1 pool: ssd-pool<br class="">
<br class="">
lcme_id: N/A<br class="">
lcme_mirror_id: N/A<br class="">
lcme_flags: 0<br class="">
lcme_extent.e_start: 5368709120<br class="">
lcme_extent.e_end: EOF<br class="">
stripe_count: 16 stripe_size: 16777216 pattern: raid0 stripe_offset: -1 pool: hdd-pool<br class="">
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pfe24.jbauer2 1228><br class="">
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<div>Cheers, Andreas</div>
<div>--</div>
<div>Andreas Dilger</div>
<div>Lustre Principal Architect</div>
<div>Whamcloud</div>
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