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<div class="">On Aug 18, 2022, at 14:28, John Bauer <<a href="mailto:bauerj@iodoctors.com" class="">bauerj@iodoctors.com</a>> wrote:</div>
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<p class="">Andreas,</p>
<p class="">Thanks for the reply. I don't think I'm accessing the Lustre filefrag ( see below ). Where would I normally find that installed? I downloaded the lustre-release git repository and can't find filefrag stuff to build my own. Is that somewhere else?</p>
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filefrag is part of the e2fsprogs package ("rpm -qf $(which filefrag)"), so you need to download and install the Lustre-patched e2fsprogs from <font color="#0068da" class=""><u class=""><a href="https://downloads.whamcloud.com/public/e2fsprogs/latest/" class="">https://downloads.whamcloud.com/public/e2fsprogs/latest/</a></u></font><br class="">
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<p class="">More info: <br class="">
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<pre class="">pfe27.jbauer2 334> cat /sys/fs/lustre/version
2.12.8_ddn12
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You should really use "lctl get_param version", since the Lustre /proc and /sys files move around on occasion.</div>
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<div>The PFL/FLR change for FIEMAP is not included in this version, but it _should_ be irrelevant because the file you are testing is using a plain layout, not PFL or FLR.<br class="">
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pfe27.jbauer2 335> filefrag -v /nobackupp17/jbauer2/dd.dat
Filesystem type is: bd00bd0
File size of /nobackupp17/jbauer2/dd.dat is 104857600 (25600 blocks of 4096 bytes)
/nobackupp17/jbauer2/dd.dat: FIBMAP unsupported
pfe27.jbauer2 336> which filefrag
/usr/sbin/filefrag
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<div class="moz-cite-prefix">John<br class="">
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<div class="moz-cite-prefix">On 8/18/22 14:57, Andreas Dilger wrote:<br class="">
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What version of Lustre are you using? Does "filefrag -v" from a newer Lustre e2fsprogs (1.45.6.wc3+) work properly?
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<div class="">There was a small change to the Lustre FIEMAP handling in order to handle overstriped files and PFL/FLR files with many stripes and multiple components, since the FIEMAP "restart" mechanism was broken for files that had multiple objects on the
same OST index. See LU-11484 for details. That change was included in the 2.14.0 release.</div>
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<div class="">In essence, the fe_device field now encodes the absolute file stripe number in the high 16 bits of fe_device, and the device number in the low 16 bits (as it did before). Since "filefrag -v" prints fe_device in hex and would show as "0x<stripe><device>"
instead of "0x0000<device>", this was considered an acceptable tradeoff compared to other "less compatible" changes that would have been needed to implement PFL/FLR handling.</div>
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<div class="">That said, I would have expected this change to result in your tool reporting very large values for fe_device (e.g. OST index + N * 65536), so returning all-zero values is somewhat unexpected. </div>
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<div class="">Cheers, Andreas</div>
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<div class="">On Aug 18, 2022, at 06:27, John Bauer <<a href="mailto:bauerj@iodoctors.com" class="moz-txt-link-freetext" moz-do-not-send="true">bauerj@iodoctors.com</a>> wrote:</div>
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<div class="">Hi all,<br class="">
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I am trying to get my llfie program (which uses fiemap) going again, but now the struct fiemap_extent structures I get back from the ioctl call, all have fe_device=0. The output from lfs getstripe indicates that the devices are not all 0. The sum of the fe_length
members adds up to the file size, so that is working. The fe_physical members look reasonable also. Has something changed? This used to work.<br class="">
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Thanks, John<br class="">
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pfe27.jbauer2 300> llfie /nobackupp17/jbauer2/dd.dat<br class="">
LustreStripeInfo_get() lum->lmm_magic=0xbd30bd0<br class="">
listExtents() fe_physical=30643484360704 fe_device=0 fe_length=16777216<br class="">
listExtents() fe_physical=30646084829184 fe_device=0 fe_length=2097152<br class="">
listExtents() fe_physical=5705226518528 fe_device=0 fe_length=16777216<br class="">
listExtents() fe_physical=5710209351680 fe_device=0 fe_length=2097152<br class="">
listExtents() fe_physical=30621271326720 fe_device=0 fe_length=16777216<br class="">
listExtents() fe_physical=31761568366592 fe_device=0 fe_length=16777216<br class="">
listExtents() fe_physical=24757567225856 fe_device=0 fe_length=16777216<br class="">
listExtents() fe_physical=14196460748800 fe_device=0 fe_length=16777216<br class="">
listExtents() nMapped=8 byteCount=104857600<br class="">
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pfe27.jbauer2 301> lfs getstripe /nobackupp17/jbauer2/dd.dat<br class="">
/nobackupp17/jbauer2/dd.dat<br class="">
lmm_stripe_count: 6<br class="">
lmm_stripe_size: 2097152<br class="">
lmm_pattern: raid0<br class="">
lmm_layout_gen: 0<br class="">
lmm_stripe_offset: 126<br class="">
lmm_pool: ssd-pool<br class="">
<span class="Apple-tab-span"></span>obdidx<span class="Apple-tab-span"> </span><span class="Apple-tab-span"></span>objid<span class="Apple-tab-span">
</span><span class="Apple-tab-span"></span>objid<span class="Apple-tab-span"> </span>
<span class="Apple-tab-span"></span>group<br class="">
<span class="Apple-tab-span"></span> 126<span class="Apple-tab-span"> </span> 13930025<span class="Apple-tab-span">
</span> 0xd48e29<span class="Apple-tab-span"> </span> 0<br class="">
<span class="Apple-tab-span"></span> 113<span class="Apple-tab-span"> </span> 13115889<span class="Apple-tab-span">
</span> 0xc821f1<span class="Apple-tab-span"> </span> 0<br class="">
<span class="Apple-tab-span"></span> 120<span class="Apple-tab-span"> </span> 14003176<span class="Apple-tab-span">
</span> 0xd5abe8<span class="Apple-tab-span"> </span> 0<br class="">
<span class="Apple-tab-span"></span> 109<span class="Apple-tab-span"> </span> 12785483<span class="Apple-tab-span">
</span> 0xc3174b<span class="Apple-tab-span"> </span> 0<br class="">
<span class="Apple-tab-span"></span> 102<span class="Apple-tab-span"> </span> 13811117<span class="Apple-tab-span">
</span> 0xd2bdad<span class="Apple-tab-span"> </span> 0<br class="">
<span class="Apple-tab-span"></span> 116<span class="Apple-tab-span"> </span> 13377285<span class="Apple-tab-span">
</span> 0xcc1f05<span class="Apple-tab-span"> </span> 0<br class="">
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<div class="">Cheers, Andreas</div>
<div class="">--</div>
<div class="">Andreas Dilger</div>
<div class="">Lustre Principal Architect</div>
<div class="">Whamcloud</div>
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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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