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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I found a problem with lock_nolock. If I
mount two GFS nodes to the same GFS filesystem, actually each node just treats
it as local drive, whenever I make some change on one node, the change won’t
show up on the other node. I don’t know if this is why the manual says
that lock_nolock only works for single node, or is there a workaround to
resolve this issue?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Thank you all.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
linux-cluster-bounces@redhat.com [mailto:linux-cluster-bounces@redhat.com] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Hong Zheng<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, January 30, 2006
3:21 PM<br>
<b><span style='font-weight:bold'>To:</span></b> linux clustering<br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [Linux-cluster]
Performance of ES3+GFS6.0+GNBD+LOCK_GULM</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Today, I tried the configuration with
lock_nolock. I configured one GFS node with lock_nolock and the performance
acts as a local drive. But here is the question, I still want to make it as a cluster
at least a active-passive cluster. Since for active-passive cluster every time
there is only one active node, I assume the data will be consistent when the
backup node takes over. I’m not sure if this is a compromise way to keep
the better performance and data consistence.<o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
linux-cluster-bounces@redhat.com [mailto:linux-cluster-bounces@redhat.com] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Hong Zheng<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, January 30, 2006
9:20 AM<br>
<b><span style='font-weight:bold'>To:</span></b> linux-cluster@redhat.com<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Linux-cluster] Performance
of ES3+GFS6.0+GNBD+LOCK_GULM</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks, Kevin.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Actually I did try the way you recommend. I configured one
GFS application node with software iscsi initiator and two lock_gulm servers,
the data transfer speed just improved a little bit, but for our application the
performance is about the same. Do you know if there is a way to tune GFS
performance?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
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