<div dir="ltr">Changing multpath conf is not supported, since this file is managed by VDSM.<div>It should work well for the oVirt use case. Configuration should be changed via the manager if needed and not via the conf.</div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><pre cols="72"><span style="font-family:arial,helvetica,sans-serif">Yaniv Dary
Technical Product Manager
Red Hat Israel Ltd.
34 Jerusalem Road
Building A, 4th floor
Ra'anana, Israel 4350109
Tel : +972 (9) 7692306
8272306
Email: <a href="mailto:ydary@redhat.com" target="_blank">ydary@redhat.com</a>
IRC : ydary</span></pre>
</div></div></div></div></div>
<br><div class="gmail_quote">On Sat, Aug 13, 2016 at 4:03 PM, <span dir="ltr"><<a href="mailto:aleksey.maksimov@it-kb.ru" target="_blank">aleksey.maksimov@it-kb.ru</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello, oVirt guru's !<br>
<br>
I installed oVirt 4.0 on several servers HP ProLiant DL360 G5 with QLogic/Emulex 4G dual-port HBAs.<br>
These servers have multipath connection to the storage system HP 3PAR 7200.<br>
<br>
Before installing oVirt to servers I set up the configuration file /etc/multipath.conf according to the vendor recommendations from document "HPE 3PAR Red Hat Enterprise Linux and Oracle Linux Implementation Guide (emr_na-c04448818-9.pdf)"<br>
<a href="https://blog.it-kb.ru/2016/06/12/configuring-device-mapper-multipathing-dm-multipat-mpio-in-centos-linux-7-2-with-emulex-and-qlogic-fc-hba-connecting-over-san-storage-hp-3par-7200-3par-os-3-2-2/" rel="noreferrer" target="_blank">https://blog.it-kb.ru/2016/06/<wbr>12/configuring-device-mapper-<wbr>multipathing-dm-multipat-mpio-<wbr>in-centos-linux-7-2-with-<wbr>emulex-and-qlogic-fc-hba-<wbr>connecting-over-san-storage-<wbr>hp-3par-7200-3par-os-3-2-2/</a><br>
<br>
Before installing oVirt my multipath.conf was the:<br>
<br>
---> start of /etc/multipath.conf <-----<br>
<br>
defaults {<br>
polling_interval 10<br>
user_friendly_names no<br>
find_multipaths yes<br>
}<br>
blacklist {<br>
devnode "^cciss\/c[0-9]d[0-9]*"<br>
}<br>
multipaths {<br>
multipath {<br>
wwid 360002ac000000000000000160000c<wbr>ec9<br>
alias 3par-vv2<br>
}<br>
multipath {<br>
wwid 360002ac000000000000000170000c<wbr>ec9<br>
alias 3par-vv1<br>
}<br>
}<br>
devices {<br>
device {<br>
vendor "3PARdata"<br>
product "VV"<br>
path_grouping_policy group_by_prio<br>
path_selector "round-robin 0"<br>
path_checker tur<br>
features "0"<br>
hardware_handler "1 alua"<br>
prio alua<br>
failback immediate<br>
rr_weight uniform<br>
no_path_retry 18<br>
rr_min_io_rq 1<br>
detect_prio yes<br>
}<br>
}<br>
---> end of /etc/multipath.conf <-----<br>
<br>
But after installing oVirt file multipath.conf has changed to:<br>
<br>
---> start of /etc/multipath.conf <-----<br>
defaults {<br>
polling_interval 5<br>
no_path_retry fail<br>
user_friendly_names no<br>
flush_on_last_del yes<br>
fast_io_fail_tmo 5<br>
dev_loss_tmo 30<br>
max_fds 4096<br>
}<br>
devices {<br>
device {<br>
all_devs yes<br>
no_path_retry fail<br>
}<br>
}<br>
---> end of /etc/multipath.conf <-----<br>
<br>
Now I'm not sure that this configuration is optimal. What do you advise?<br>
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</blockquote></div><br></div>