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<p>Thanks for the info. I've been able to duplicate this issue and
was actually about to post a message about the same thing. :D</p>
<p>I have a small cluster set up with 4 active OSTs and 1 inactive
due to the volume being replaced. df takes about 1-2 minutes to
run on my client note as shown in strace.</p>
<p>14:40:09 statfs("/var/mnt/lustre", {f_type=0xbd00bd0,
f_bsize=4096, f_blocks=521922232, f_bfree=486861158,
f_bavail=459730446, f_files=30737207, f_ffree=30551196,
f_fsid={743766374, 0}, f_namelen=255, f_frsize=4096}) = 0</p>
<p>14:41:49 --- SIGWINCH {si_signo=SIGWINCH, si_code=SI_KERNEL,
si_value={int=2447996504, ptr=0x7f5d91e97658}} ---<br>
14:41:49 stat("/var/mnt/lustre", {st_mode=S_IFDIR|0755,
st_size=4096, ...}) = 0<br>
14:41:49 open("/usr/lib64/gconv/gconv-modules.cache", O_RDONLY) =
3<br>
</p>
<p>Setting lazystatfs to 1 does fix the issue.</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 11/24/2016 04:34 PM, Jerome, Ronald
wrote:<br>
</div>
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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m seeing what appears to be <a
moz-do-not-send="true"
href="https://jira.hpdd.intel.com/browse/LU-4397">LU-4397</a>
on a newly installed Lustre 2.8.0 (CentOS 7) system. I
disabled an OST on the MGS using <span
style="font-family:"Courier New"">lctl conf_param
data-OST0001.osc.active=0, </span>and the clients can mount
and use the file system, however df on the clients hangs for
about 100s before returning the results. Setting lazystatfs
using <span style="font-family:"Courier New"">lctl
conf_param data.llite.lazystatfs=1 </span>resolves the
issue. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Interestingly, CentOS 6 clients don’t have
this issue, only CentOS 7 clients. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Also of note, CentOS 6 clients show the OST
as Inactive, but the CentOS 7 clients don’t (note data-OST0001
in these two listings).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier
New"">[root@x92 ~]# lctl dl<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 0 UP mgc MGC10.1.0.200@o2ib
1a4b524d-6171-72a0-670b-58524f5135c9 5<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 1 UP lov data-clilov-ffff8804bcaafc00
a4e753f1-6495-dfe9-d854-8d3e7305b6e8 4<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 2 UP lmv data-clilmv-ffff8804bcaafc00
a4e753f1-6495-dfe9-d854-8d3e7305b6e8 4<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 3 UP mdc data-MDT0000-mdc-ffff8804bcaafc00
a4e753f1-6495-dfe9-d854-8d3e7305b6e8 5<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 4 UP osc data-OST0005-osc-ffff8804bcaafc00
a4e753f1-6495-dfe9-d854-8d3e7305b6e8 5<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 5 UP osc data-OST0002-osc-ffff8804bcaafc00
a4e753f1-6495-dfe9-d854-8d3e7305b6e8 5<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 6 UP osc data-OST0004-osc-ffff8804bcaafc00
a4e753f1-6495-dfe9-d854-8d3e7305b6e8 5<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 7 UP osc data-OST0003-osc-ffff8804bcaafc00
a4e753f1-6495-dfe9-d854-8d3e7305b6e8 5<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 8 IN osc data-OST0001-osc-ffff8804bcaafc00
a4e753f1-6495-dfe9-d854-8d3e7305b6e8 5<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New"">[root@x87 ~]# lctl dl<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 0 UP mgc MGC10.1.0.200@o2ib
e5ab9926-ffa3-2c47-3851-e480303a42cc 5<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 1 UP lov data-clilov-ffff88031ef85000
213b8ef0-18f9-b7d7-7c43-c8dfb333a11f 4<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 2 UP lmv data-clilmv-ffff88031ef85000
213b8ef0-18f9-b7d7-7c43-c8dfb333a11f 4<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 3 UP mdc data-MDT0000-mdc-ffff88031ef85000
213b8ef0-18f9-b7d7-7c43-c8dfb333a11f 5<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 4 UP osc data-OST0005-osc-ffff88031ef85000
213b8ef0-18f9-b7d7-7c43-c8dfb333a11f 5<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 5 UP osc data-OST0002-osc-ffff88031ef85000
213b8ef0-18f9-b7d7-7c43-c8dfb333a11f 5<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 6 UP osc data-OST0004-osc-ffff88031ef85000
213b8ef0-18f9-b7d7-7c43-c8dfb333a11f 5<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 7 UP osc data-OST0003-osc-ffff88031ef85000
213b8ef0-18f9-b7d7-7c43-c8dfb333a11f 5<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New""> 8 UP osc data-OST0001-osc-ffff88031ef85000
213b8ef0-18f9-b7d7-7c43-c8dfb333a11f 4<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:EN-CA"
lang="EN-US">Ron Jerome<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:EN-CA"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:EN-CA"
lang="EN-US">Team Leader, Infrastructure/Operations<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:EN-CA"
lang="EN-US">Supercomputing Directorate<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:EN-CA"
lang="EN-US">Shared Services Canada / Government of Canada<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:EN-CA"
lang="EN-US"><br>
<br>
<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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