<div dir="ltr">Hi,<div><br></div><div>Thank you for reporting this. It appears to be a problem with 1xn volumes (single dht subvol) and I could reproduce this with a single brick pure distribute volume. I have filed a BZ for this [1] and posted a patch.</div><div><br></div><div>The messages do not indicate a problem and can be ignored.</div><div><br></div><div>Regards,</div><div>Nithya</div><div><br></div><div>[1] <a href="https://bugzilla.redhat.com/show_bug.cgi?id=1537457">https://bugzilla.redhat.com/show_bug.cgi?id=1537457</a></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 23 January 2018 at 11:16, Nithya Balachandran <span dir="ltr"><<a href="mailto:nbalacha@redhat.com" target="_blank">nbalacha@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote"><div><div class="h5">On 17 January 2018 at 16:04, Ing. Luca Lazzeroni - Trend Servizi Srl <span dir="ltr"><<a href="mailto:luca@trendservizi.it" target="_blank">luca@trendservizi.it</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<p>Here's the volume info:</p>
<p> <br>
Volume Name: gv2a2<br>
Type: Replicate<br>
Volume ID: 83c84774-2068-4bfc-b0b9-3e6b93<wbr>705b9f<br>
Status: Started<br>
Snapshot Count: 0<br>
Number of Bricks: 1 x (2 + 1) = 3<br>
Transport-type: tcp<br>
Bricks:<br>
Brick1: gluster1:/bricks/brick2/gv2a2<br>
Brick2: gluster3:/bricks/brick3/gv2a2<br>
Brick3: gluster2:/bricks/arbiter_brick<wbr>_gv2a2/gv2a2 (arbiter)<br>
Options Reconfigured:<br>
storage.owner-gid: 107<br>
storage.owner-uid: 107<br>
user.cifs: off<br>
features.shard: on<br>
cluster.shd-wait-qlength: 10000<br>
cluster.shd-max-threads: 8<br>
cluster.locking-scheme: granular<br>
cluster.data-self-heal-algorit<wbr>hm: full<br>
cluster.server-quorum-type: server<br>
cluster.quorum-type: auto<br>
cluster.eager-lock: enable<br>
network.remote-dio: enable<br>
performance.low-prio-threads: 32<br>
performance.io-cache: off<br>
performance.read-ahead: off<br>
performance.quick-read: off<br>
transport.address-family: inet<br>
nfs.disable: off<br>
performance.client-io-threads: off<br>
</p>
<p>The only client I'm using is FUSE client used to mount the
gluster volume. On the gluster volume there is a maximum of 15
files ("big" files because they host VM images) accessed by
qemu-kvm as normal files on the FUSE mounted volume.</p>
<p>By inspecting the code I've found that the message is logged in 2
situations: <br>
</p>
<p>1) A real "Hole" in DHT</p>
<p>2) A "virgin" file being created</p>
<p>I think this is the second situation because that message appears
only when I create a new qcow2 volume to host VM image.</p><div><div class="m_1312303606106028575h5">
<p><span style="color:rgb(34,34,34)"></span></p></div></div></div></blockquote></div></div><div> These messages should ideally be seen only for directories and I have never seen it with a null gfid so far. I'll try to reproduce this and get back to you.</div><div><br></div><div>Regards,</div><div>Nithya</div><div><div class="h5"><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div text="#000000" bgcolor="#FFFFFF"><div><div class="m_1312303606106028575h5">
<div class="m_1312303606106028575m_-274641169728427609moz-cite-prefix">Il 17/01/2018 04:54, Nithya
Balachandran ha scritto:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>Hi,</div>
<div><br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On 16 January 2018 at 18:56, Ing.
Luca Lazzeroni - Trend Servizi Srl <span dir="ltr"><<a href="mailto:luca@trendservizi.it" target="_blank">luca@trendservizi.it</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi,<br>
<br>
I'm testing gluster 3.12.4 and, by inspecting log files
/var/log/glusterfs/mnt-gv0.log (gv0 is the volume name), I
found many lines saying:<br>
<br>
[2018-01-15 09:45:41.066914] I [MSGID: 109063]
[dht-layout.c:716:dht_layout_n<wbr>ormalize] 0-gv0-dht:
Found anomalies in (null) (gfid =
00000000-0000-0000-0000-000000<wbr>000000). Holes=1
overlaps=0<br>
[2018-01-15 09:45:45.755021] I [MSGID: 109063]
[dht-layout.c:716:dht_layout_n<wbr>ormalize] 0-gv0-dht:
Found anomalies in (null) (gfid =
00000000-0000-0000-0000-000000<wbr>000000). Holes=1
overlaps=0<br>
[2018-01-15 14:02:29.171437] I [MSGID: 109063]
[dht-layout.c:716:dht_layout_n<wbr>ormalize] 0-gv0-dht:
Found anomalies in (null) (gfid =
00000000-0000-0000-0000-000000<wbr>000000). Holes=1
overlaps=0<br>
<br>
What do they mean ? Is there any real problem ?<br>
<br>
</blockquote>
<div><br>
</div>
Please provide the following details:</div>
<div class="gmail_quote">gluster volume info</div>
<div class="gmail_quote">what clients you are using and what
operations being performed
<div>Any steps to reproduce this issue.</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Nithya</div>
<div><br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
Thank you,<span class="m_1312303606106028575m_-274641169728427609gmail-HOEnZb"><font color="#888888"><br>
<br>
<br>
-- <br>
Ing. Luca Lazzeroni<br>
Responsabile Ricerca e Sviluppo<br>
Trend Servizi Srl<br>
Tel: 0376/631761<br>
Web: <a href="https://www.trendservizi.it" rel="noreferrer" target="_blank">https://www.trendservizi.it</a><br>
<br>
______________________________<wbr>_________________<br>
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</font></span></blockquote>
</div>
<br>
</div>
</div>
</blockquote>
<br>
<pre class="m_1312303606106028575m_-274641169728427609moz-signature" cols="72">--
Ing. Luca Lazzeroni
Responsabile Ricerca e Sviluppo
Trend Servizi Srl
Tel: 0376/631761
Web: <a class="m_1312303606106028575m_-274641169728427609moz-txt-link-freetext" href="https://www.trendservizi.it" target="_blank">https://www.trendservizi.it</a></pre>
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