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<p>Andreas,</p>
<p>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? More info: <br>
</p>
<pre>pfe27.jbauer2 334> cat /sys/fs/lustre/version
2.12.8_ddn12
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
</pre>
<div class="moz-cite-prefix">John<br>
</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">On 8/18/22 14:57, Andreas Dilger wrote:<br>
</div>
<blockquote type="cite"
cite="mid:E166F2A4-5F6B-43CC-8E8E-055B25B9A97C@whamcloud.com">
What version of Lustre are you using? Does "filefrag -v" from a
newer Lustre e2fsprogs (1.45.6.wc3+) work properly?
<div class=""><br class="">
</div>
<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>
<div class=""><br class="">
</div>
<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>
<div class=""><br class="">
</div>
<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>
<div class=""><br class="">
</div>
<div class="">Cheers, Andreas</div>
<div class="">
<div><br class="">
<blockquote type="cite" class="">
<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>
<br class="Apple-interchange-newline">
<div class="">
<div class="">Hi all,<br class="">
<br class="">
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="">
<br class="">
Thanks, John<br class="">
<br class="">
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="">
<br class="">
<br class="">
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="">
<br class="">
_______________________________________________<br
class="">
lustre-discuss mailing list<br class="">
<a href="mailto:lustre-discuss@lists.lustre.org"
class="moz-txt-link-freetext" moz-do-not-send="true">lustre-discuss@lists.lustre.org</a><br
class="">
<a class="moz-txt-link-freetext" href="http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org">http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org</a><br
class="">
</div>
</div>
</blockquote>
</div>
<br class="">
<div class="">
<div dir="auto" class="">
<div dir="auto" class="">
<div dir="auto" class="">
<div dir="auto" class="">
<div dir="auto" class="">
<div dir="auto" class="">
<div>Cheers, Andreas</div>
<div>--</div>
<div>Andreas Dilger</div>
<div>Lustre Principal Architect</div>
<div>Whamcloud</div>
<div><br class="">
</div>
<div><br class="">
</div>
<div><br class="">
</div>
</div>
</div>
</div>
</div>
</div>
<br class="Apple-interchange-newline">
</div>
<br class="Apple-interchange-newline">
<br class="Apple-interchange-newline">
</div>
<br class="">
</div>
</blockquote>
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