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<p><a class="moz-txt-link-freetext" href="http://www.emc.com/collateral/TechnicalDocument/docu5128.pdf">http://www.emc.com/collateral/TechnicalDocument/docu5128.pdf</a></p>
<p>page 219</p>
<p>this is the default in rhel.</p>
<p> device {<br>
vendor "EMC"<br>
product "SYMMETRIX"<br>
path_grouping_policy multibus<br>
getuid_callout "/lib/udev/scsi_id --page=pre-spc3-83 --whitelisted --device=/dev/%n"<br>
path_selector "round-robin 0"<br>
path_checker tur<br>
features "0"<br>
hardware_handler "0"<br>
prio const<br>
rr_weight uniform<br>
no_path_retry 6<br>
rr_min_io 1000<br>
rr_min_io_rq 1<br>
}</p>
<p>my defaults<br>
</p>
<p>defaults {<br>
user_friendly_names yes<br>
find_multipaths yes<br>
udev_dir /dev<br>
polling_interval 60<br>
path_grouping_policy multibus<br>
path_checker readsector0<br>
rr_min_io_rq 100<br>
rr_weight priorities<br>
failback immediate<br>
max_fds max<br>
features "0" <br>
}</p>
<p>run multipathd show config to see the defaults. <br>
</p>
<div class="moz-cite-prefix">On 11/15/16 10:59 AM, Wahl, Edward wrote:<br>
</div>
<blockquote cite="mid:9DA9EC7A281AC7428A9618AFDC4904995901FBDF@CIO-KRC-D1MBX02.osuad.osu.edu" type="cite">
<div style="font-family:'Calibri','sans-serif'">
<div dir="ltr">Hey Jason if you want to get me an lsscsi output I can probably whip up a multi-path.conf block for your customer or talk to them on the phone if you like.
<div dir="ltr"><br>
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<div dir="ltr">Ed</div>
<div dir="ltr"><br>
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<div id="htc_header">----- Reply message -----<br>
From: "Jason Bennett" <a class="moz-txt-link-rfc2396E" href="mailto:jasonbennett@us.ibm.com">
<jasonbennett@us.ibm.com></a><br>
To: "gpfsug main discussion list" <a class="moz-txt-link-rfc2396E" href="mailto:gpfsug-discuss@spectrumscale.org">
<gpfsug-discuss@spectrumscale.org></a><br>
Subject: [gpfsug-discuss] multipath.conf for EMC V-max<br>
Date: Tue, Nov 15, 2016 11:37 AM</div>
</div>
<br>
<div>
<p>Trying to help a customer resolve a multipath.conf issue....<br>
<font face="Calibri" color="#1F497D">I am at a major stopping point regarding my deployment on Linux. I’m working with our SAN Team to get a good /etc/multipath.conf configuration with a stanza for our EMC V-max SAN presented. I have PowerPath installed
and the SAN disk can been seen from both linux nodes but I need to set three items in a custom devices stanza to ensure no disks locking. The three items required for concurrent disk without locks are: feature=0, failback=immediate & no_path_retry=fail.
If you were to reply with an example of the multipath.conf where you’ve used EMC V-max I would just be tickled pink.</font><br>
<font face="Arial" size="2"><br>
Thanks.</font><br>
Jason Bennett<br>
IBM<br>
<br>
</p>
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