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<p class="MsoNormal"><span lang="EN-US" style="color:windowtext">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:windowtext">I check the link you provided. It does not mention the the “dirty” attribute, if I try to fix this split-brain by manually setfattr command, should I only set the “</span><span lang="EN-US" style="font-family:"Arial",sans-serif;color:#333333">trusted.afr.export-client-0”
command? <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Arial",sans-serif;color:#333333">By the way, I feel it is quite strange that the output of “gluster volume heal export info” command there is two entries with the same name, how does this happen?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">gluster volume heal export info<br>
Brick sn-0.local:/mnt/bricks/export/brick<br>
Status: Connected<br>
Number of entries: 0<br>
<br>
Brick sn-1.local:/mnt/bricks/export/brick<br>
/testdir - Is in split-brain<br>
<br>
/testdir - Possibly undergoing heal<br>
<br>
Status: Connected<br>
Number of entries: 2</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:windowtext">I also do some other test, when sn-0 side file/dir does not has “dirty” and “trusted.afr.export-client-*” attribute and sn-1 side file/dir has both “dirty” and “trusted.afr.export-client-*” non-zero.
The gluster could self heal such scenario. But in this case the it could never self heal.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:windowtext"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal" align="left" style="text-align:left"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">
Ravishankar N [mailto:ravishankar@redhat.com] <br>
<b>Sent:</b> Thursday, February 08, 2018 11:56 AM<br>
<b>To:</b> Zhou, Cynthia (NSB - CN/Hangzhou) <cynthia.zhou@nokia-sbell.com>; Gluster-devel@gluster.org<br>
<b>Subject:</b> Re: query about a split-brain problem found in glusterfs3.12.3<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US"><o:p> </o:p></span></p>
<p><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-US">On 02/08/2018 07:16 AM, Zhou, Cynthia (NSB - CN/Hangzhou) wrote:<o:p></o:p></span></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span lang="EN-US" style="color:windowtext">Hi,</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:windowtext">Thanks for responding?</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:windowtext">If split-brain happen in such kind of test is reasonable, how to fix this split-brain situation?</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Calibri",sans-serif;color:windowtext"> </span><span lang="EN-US"><o:p></o:p></span></p>
</blockquote>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">If you are using replica 2, then there is no prevention. Once they occur, you can resolve them using
<a href="http://docs.gluster.org/en/latest/Troubleshooting/resolving-splitbrain/">
http://docs.gluster.org/en/latest/Troubleshooting/resolving-splitbrain/</a><br>
<br>
If you want to prevent split-brain, you would need to use replica 3 or arbiter volume.<br>
<br>
Regards,<br>
Ravi<br>
<br>
<o:p></o:p></span></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<p class="MsoNormal" align="left" style="text-align:left"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">
Ravishankar N [<a href="mailto:ravishankar@redhat.com">mailto:ravishankar@redhat.com</a>]
<br>
<b>Sent:</b> Thursday, February 08, 2018 12:12 AM<br>
<b>To:</b> Zhou, Cynthia (NSB - CN/Hangzhou) <a href="mailto:cynthia.zhou@nokia-sbell.com">
<cynthia.zhou@nokia-sbell.com></a>; <a href="mailto:Gluster-devel@gluster.org">Gluster-devel@gluster.org</a><br>
<b>Subject:</b> Re: query about a split-brain problem found in glusterfs3.12.3</span><span lang="EN-US"><o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-US">On 02/07/2018 10:39 AM, Zhou, Cynthia (NSB - CN/Hangzhou) wrote:<o:p></o:p></span></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Hi glusterfs expert:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"> Good day.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"> Lately, we meet a glusterfs split brain problem in our env in /mnt/export/testdir. We start 3 ior process (IOR tool) from non-sn nodes, which is
creating/removing files repeatedly in testdir. then we reboot sn nodes(sn0 and sn1) by sequence. Then we meet following problem.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"> Do you have some comments on how this could happen? And how to fix it in this situation? Thanks!<o:p></o:p></span></p>
</blockquote>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><br>
Is the problem that split-brain is happening? Is this a replica 2 volume? If yes, then it looks like it is expected behavior?<br>
Regards<br>
Ravi<br>
<br>
<br>
</span><span lang="EN-US"><o:p></o:p></span></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">gluster volume heal export info<br>
Brick sn-0.local:/mnt/bricks/export/brick<br>
Status: Connected<br>
Number of entries: 0<br>
<br>
Brick sn-1.local:/mnt/bricks/export/brick<br>
/testdir - Is in split-brain<br>
<br>
/testdir - Possibly undergoing heal<br>
<br>
Status: Connected<br>
Number of entries: 2</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">wait for a while
</span><span style="font-size:10.0pt">…<span lang="EN-US">..</span></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">gluster volume heal export info<br>
Brick sn-0.local:/mnt/bricks/export/brick<br>
Status: Connected<br>
Number of entries: 0<br>
<br>
Brick sn-1.local:/mnt/bricks/export/brick<br>
/testdir - Possibly undergoing heal<br>
<br>
/testdir - Possibly undergoing heal</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">and finally:</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333">[root@<a href="http://sn-0/root"><span style="font-size:12.0pt;color:#3B73AF">sn-0:/root</span></a>]<br>
# gluster v heal export info<br>
Brick sn-0.<a href="http://local/mnt/bricks/export/brick"><span style="font-size:12.0pt;color:#3B73AF">local:/mnt/bricks/export/brick</span></a><br>
Status: Connected<br>
Number of entries: 0</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans: 2;widows:
2;-webkit-text-stroke-width: 0px;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333">Brick sn-1.<a href="http://local/mnt/bricks/export/brick"><span style="font-size:12.0pt;color:#3B73AF">local:/mnt/bricks/export/brick</span></a><br>
/testdir - Is in split-brain</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans: 2;widows:
2;-webkit-text-stroke-width: 0px;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333">Status: Connected<br>
Number of entries: 1</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans: 2;widows:
2;-webkit-text-stroke-width: 0px;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans: 2;widows:
2;-webkit-text-stroke-width: 0px;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333">[root@<a href="http://sn-0/root"><span style="font-size:12.0pt;color:#3B73AF">sn-0:/root</span></a>]</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans: 2;widows:
2;-webkit-text-stroke-width: 0px;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333"># getfattr -m .* -d -e hex /mnt/bricks/export/brick/testdir</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans: 2;widows:
2;-webkit-text-stroke-width: 0px;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333">getfattr: Removing leading '/' from absolute path names</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans: 2;widows:
2;-webkit-text-stroke-width: 0px;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333"># file: mnt/bricks/export/brick/testdir</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans: 2;widows:
2;-webkit-text-stroke-width: 0px;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333">trusted.gfid=0x5622cff893b3484dbdb6a20a0edb0e77</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans: 2;widows:
2;-webkit-text-stroke-width: 0px;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333">trusted.glusterfs.dht=0x000000010000000000000000ffffffff</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans: 2;widows:
2;-webkit-text-stroke-width: 0px;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333">[root@<a href="http://sn-1/root"><span style="font-size:12.0pt;color:#3B73AF">sn-1:/root</span></a>]</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans: 2;widows:
2;-webkit-text-stroke-width: 0px;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333"># getfattr -m .* -d -e hex /mnt/bricks/export/brick/testdir</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans: 2;widows:
2;-webkit-text-stroke-width: 0px;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333">getfattr: Removing leading '/' from absolute path names</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans: 2;widows:
2;-webkit-text-stroke-width: 0px;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333"># file: mnt/bricks/export/brick/testdir</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans: 2;widows:
2;-webkit-text-stroke-width: 0px;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333">trusted.afr.dirty=0x000000000000000000000001</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans: 2;widows:
2;-webkit-text-stroke-width: 0px;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333">trusted.afr.export-client-0=0x000000000000000000000038</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans: 2;widows:
2;-webkit-text-stroke-width: 0px;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333">trusted.gfid=0x5622cff893b3484dbdb6a20a0edb0e77</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="mso-margin-top-alt:7.5pt;margin-right:0cm;margin-bottom:0cm;margin-left:0cm;margin-bottom:.0001pt;background:white;font-variant-ligatures:
normal;font-variant-caps: normal;orphans: 2;widows:
2;-webkit-text-stroke-width: 0px;text-decoration-style:
initial;text-decoration-color: initial;word-spacing:0px">
<span lang="EN-US" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333">trusted.glusterfs.dht=0x000000010000000000000000ffffffff</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
</blockquote>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
</blockquote>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
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