<div class="gmail_extra">Updating subject line.</div><div class="gmail_extra"><br></div><div class="gmail_extra">regards,</div><div class="gmail_extra">Adarsh.<br><br><div class="gmail_quote">On 27 April 2012 13:43, Adarsh <span dir="ltr"><<a href="mailto:adarshanto@gmail.com" target="_blank">adarshanto@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="gmail_extra">Hello,</div><div class="gmail_extra"><br></div><div class="gmail_extra">Please note that when I remove a LUN, I will follow the "Clean Device Removal"</div>
<div class="gmail_extra"><p class="MsoNormal">
<a href="http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Online_Storage_Reconfiguration_Guide/removing_devices.html" target="_blank">http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Online_Storage_Reconfiguration_Guide/removing_devices.html</a><span style="color:#1f497d"></span></p>
</div><div class="gmail_extra"><br></div><div class="gmail_extra">However, sometimes people won't follow those steps.</div><div class="gmail_extra">I want to handle such scenarios gracefully.</div><div class="gmail_extra">
<br></div><div class="gmail_extra">regards,</div><div class="gmail_extra">Adarsh.</div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><br><div class="gmail_quote">On 27 April 2012 12:58, Adarsh <span dir="ltr"><<a href="mailto:adarshanto@gmail.com" target="_blank">adarshanto@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<div><br></div><div><span>I am trying to setup a RH Linux multipath setup with 256 LUNs.</span></div><div><span>I am facing an issue.</span></div>
<div><span><br></span></div><div><span>After deleting a LUN, I am invoking "multipath" command to immediately update the MPIO database.</span></div>
<div><span>However, it takes 30-40 minutes mostly.</span></div><div><font color="#222222" face="arial, sans-serif">Kindly advice how I can reduce the time taken to a few minutes at the max.</font></div><div><font color="#222222" face="arial, sans-serif"><br>
</font></div><div><font color="#222222" face="arial, sans-serif">Also, how often does multipathd update the MPIO database.</font></div><div><font color="#222222" face="arial, sans-serif">Basically, I am trying to remove the stale LUN as soon as possible from the database (say 5-8 seconds)</font></div>
<div><font color="#222222" face="arial, sans-serif">Is there any way to ensure/force that.</font></div><div><font color="#222222" face="arial, sans-serif"><br></font></div><div><font color="#222222" face="arial, sans-serif">Any help will be really appreciated.</font></div>
<div><font color="#222222" face="arial, sans-serif"><br></font></div><div><span style="color:rgb(34,34,34);font-family:arial,sans-serif">regards,</span></div><div><font color="#222222" face="arial, sans-serif">Adarsh.</font></div>
<div><font color="#222222" face="arial, sans-serif"><br></font></div><div><font color="#222222" face="arial, sans-serif"><br></font></div><div><font color="#222222" face="arial, sans-serif">Setup:</font></div><div><font color="#222222" face="arial, sans-serif">=====</font></div>
<div><font color="#222222" face="arial, sans-serif">RHEL 5.6 (Linux x336-207-59 2.6.18-238.9.1.el5)</font></div><div><font color="#222222" face="arial, sans-serif">Multipath tools: 0.4.7</font></div><div><font color="#222222" face="arial, sans-serif"><br>
</font></div><div><font color="#222222" face="arial, sans-serif">multipath.conf:</font></div><div><font color="#222222" face="arial, sans-serif">============</font></div><div><font color="#222222" face="arial, sans-serif"><div>
defaults {</div><div> user_friendly_names no</div><div> max_fds max</div><div> queue_without_daemon no</div><div> pg_prio_calc avg</div><div> flush_on_last_del yes</div>
<div>}</div><div><br></div><div>blacklist {</div><div> wwid SIBM-ESXSMAW3073NC_FDAR9P6402P4G</div><div> wwid SIBM-ESXSMAW3073NC_FDAR9P6402PU9</div><div> devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"</div>
<div> devnode "^hd[a-z]"</div><div> devnode "^cciss.*"</div><div>}</div><div><br></div><div>devices {</div><div> device {</div><div> vendor "NETAPP"</div>
<div> product "LUN"</div><div> getuid_callout "/sbin/scsi_id -g -u -s /block/%n"</div><div> prio_callout "/sbin/mpath_prio_alua /dev/%n"</div><div>
hardware_handler "0"</div><div> failback immediate</div><div> flush_on_last_del yes</div><div> }</div><div>}</div></font></div>
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