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<div>The problem that Lustre clients fail to mount when they get an unknown parameter is fixed in newer Lustre releases (2.9+) via patch <a href="https://review.whamcloud.com/21112">https://review.whamcloud.com/21112</a> . </div>
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<div id="AppleMailSignature">The current maintenance release is 2.10.1. </div>
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<div id="AppleMailSignature">You could also work around this by erasing the configuration parameters (see Lustre manual). </div>
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Cheers, Andreas</div>
<div><br>
On Nov 15, 2017, at 09:26, Harald van Pee <<a href="mailto:pee@hiskp.uni-bonn.de">pee@hiskp.uni-bonn.de</a>> wrote:<br>
<br>
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<blockquote type="cite">
<div><span>Here are more informations:</span><br>
<span></span><br>
<span>if I try to mount the filesystem on the client I get similar messages as from
</span><br>
<span>the failing conf_param command. It seems one have to remove this failed </span>
<br>
<span>configuration but how?</span><br>
<span>Here the syslog output on the client:</span><br>
<span></span><br>
<span>kernel: [ 4203.506437] LustreError: 3698:0:</span><br>
<span>(obd_mount.c:1340:lustre_fill_super()) Unable to mount (-2)</span><br>
<span>kernel: [ 5028.547095] LustreError: 3830:0:</span><br>
<span>(obd_config.c:1202:class_process_config()) no device for: hiskp3-OST0000-osc-</span><br>
<span>ffff880416680800</span><br>
<span>kernel: [ 5028.547105] LustreError: 3830:0:</span><br>
<span>(obd_config.c:1606:class_config_llog_handler()) MGC192.168.128.200@o2ib: cfg
</span><br>
<span>command failed: rc = -22</span><br>
<span>kernel: [ 5028.547112] Lustre: cmd=cf00f 0:hiskp3-OST0000-osc </span><br>
<span>1:osc.max_pages_per_rpc=256 </span><br>
<span>kernel: [ 5028.547112] </span><br>
<span>kernel: [ 5028.547156] LustreError: 15b-f: MGC192.168.128.200@o2ib: The </span>
<br>
<span>configuration from log 'hiskp3-client'failed from the MGS (-22). Make sure
</span><br>
<span>this client and the MGS are running compatible versions of Lustre.</span><br>
<span>kernel: [ 5028.547407] LustreError: 1680:0:(lov_obd.c:946:lov_cleanup()) </span>
<br>
<span>hiskp3-clilov-ffff880416680800: lov tgt 1 not cleaned! deathrow=0, lovrc=1</span><br>
<span>kernel: [ 5028.547415] LustreError: 1680:0:(lov_obd.c:946:lov_cleanup()) </span>
<br>
<span>Skipped 3 previous similar messages</span><br>
<span>kernel: [ 5028.550906] Lustre: Unmounted hiskp3-client</span><br>
<span>kernel: [ 5028.551407] LustreError: 3815:0:</span><br>
<span>(obd_mount.c:1340:lustre_fill_super()) Unable to mount (-22)</span><br>
<span></span><br>
<span></span><br>
<span></span><br>
<span>On Wednesday 15 November 2017 16:06:29 Harald van Pee wrote:</span><br>
<blockquote type="cite"><span>Dear all,</span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>I want to set max_pages_per_rpc to 64 instead of 256</span><br>
</blockquote>
<blockquote type="cite"><span>lustre mgs/mdt version 2.53</span><br>
</blockquote>
<blockquote type="cite"><span>lustre oss version 2.53</span><br>
</blockquote>
<blockquote type="cite"><span>lustre client 2.6</span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>on client I have done:</span><br>
</blockquote>
<blockquote type="cite"><span>lctl get_param osc.hiskp3-OST*.max_pages_per_rpc</span><br>
</blockquote>
<blockquote type="cite"><span>osc.hiskp3-OST0001-osc-ffff88105dba4800.max_pages_per_rpc=256</span><br>
</blockquote>
<blockquote type="cite"><span>osc.hiskp3-OST0002-osc-ffff88105dba4800.max_pages_per_rpc=256</span><br>
</blockquote>
<blockquote type="cite"><span>osc.hiskp3-OST0003-osc-ffff88105dba4800.max_pages_per_rpc=256</span><br>
</blockquote>
<blockquote type="cite"><span>osc.hiskp3-OST0004-osc-ffff88105dba4800.max_pages_per_rpc=256</span><br>
</blockquote>
<blockquote type="cite"><span>lctl set_param osc.hiskp3-OST*.max_pages_per_rpc=64</span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>this works, but after remount I get again 256 therefore I want to make it</span><br>
</blockquote>
<blockquote type="cite"><span>permant with</span><br>
</blockquote>
<blockquote type="cite"><span>lctl conf_param hiskp3-OST*.osc.max_pages_per_rpc=64</span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>But I get the message, that this command have to be given on mdt</span><br>
</blockquote>
<blockquote type="cite"><span>unfortunately I go to our combined mgs/mdt and get</span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>Lustre: Setting parameter hiskp3-OST0000-osc.osc.max_pages_per_rpc in log</span><br>
</blockquote>
<blockquote type="cite"><span>hiskp3-client</span><br>
</blockquote>
<blockquote type="cite"><span>LustreError: 956:0:(obd_config.c:1221:class_process_config()) no device</span><br>
</blockquote>
<blockquote type="cite"><span>for: hiskp3-OST0000-osc-MDT0000</span><br>
</blockquote>
<blockquote type="cite"><span>LustreError: 956:0:(obd_config.c:1591:class_config_llog_handler())</span><br>
</blockquote>
<blockquote type="cite"><span>MGC192.168.128.200@o2ib: cfg command failed: rc = -22</span><br>
</blockquote>
<blockquote type="cite"><span>Lustre: cmd=cf00f 0:hiskp3-OST0000-osc-MDT0000 </span>
<br>
</blockquote>
<blockquote type="cite"><span>1:osc.max_pages_per_rpc=64</span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>than I can not mount client and want to go back</span><br>
</blockquote>
<blockquote type="cite"><span>lctl set_param osc.hiskp3-OST*.max_pages_per_rpc=64</span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>Lustre: Modifying parameter hiskp3-OST0000-osc.osc.max_pages_per_rpc in log</span><br>
</blockquote>
<blockquote type="cite"><span>hiskp3-client</span><br>
</blockquote>
<blockquote type="cite"><span>Lustre: Skipped 1 previous similar message</span><br>
</blockquote>
<blockquote type="cite"><span>LustreError: 966:0:(obd_config.c:1221:class_process_config()) no device</span><br>
</blockquote>
<blockquote type="cite"><span>for: hiskp3-OST0000-osc-MDT0000</span><br>
</blockquote>
<blockquote type="cite"><span>LustreError: 966:0:(obd_config.c:1591:class_config_llog_handler())</span><br>
</blockquote>
<blockquote type="cite"><span>MGC192.168.128.200@o2ib: cfg command failed: rc = -22</span><br>
</blockquote>
<blockquote type="cite"><span>Lustre: cmd=cf00f 0:hiskp3-OST0000-osc-MDT0000 </span>
<br>
</blockquote>
<blockquote type="cite"><span>1:osc.max_pages_per_rpc=256</span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>obviously what I have done was completly wrong and I can no longer mount a</span><br>
</blockquote>
<blockquote type="cite"><span>client, mounted clients are working.</span><br>
</blockquote>
<blockquote type="cite"><span>How can I get it back working?</span><br>
</blockquote>
<blockquote type="cite"><span>hiskp3-MDT0000 ist the label of the mgs/mdt but hiskp3-OST0000-osc-MDT0000</span><br>
</blockquote>
<blockquote type="cite"><span>seems to be incorrect</span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>What I have to do to get the mgs/mdt working again?</span><br>
</blockquote>
<blockquote type="cite"><span>Its your production cluster</span><br>
</blockquote>
<blockquote type="cite"><span>Any help is welcome</span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span>Best</span><br>
</blockquote>
<blockquote type="cite"><span>Harald</span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
</blockquote>
<blockquote type="cite"><span></span><br>
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<blockquote type="cite"><span>_______________________________________________</span><br>
</blockquote>
<blockquote type="cite"><span>lustre-discuss mailing list</span><br>
</blockquote>
<blockquote type="cite"><span><a href="mailto:lustre-discuss@lists.lustre.org">lustre-discuss@lists.lustre.org</a></span><br>
</blockquote>
<blockquote type="cite"><span><a href="http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org">http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org</a></span><br>
</blockquote>
<span></span><br>
<span>-- </span><br>
<span>Harald van Pee</span><br>
<span></span><br>
<span>Helmholtz-Institut fuer Strahlen- und Kernphysik der Universitaet Bonn</span><br>
<span>Nussallee 14-16 - 53115 Bonn - Tel +49-228-732213 - Fax +49-228-732505</span><br>
<span>mail: <a href="mailto:pee@hiskp.uni-bonn.de">pee@hiskp.uni-bonn.de</a></span><br>
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