I am trying to setup a RH Linux multipath setup with 256 LUNs.
I am facing an issue.
After deleting a LUN, I am invoking "multipath" command to immediately update the MPIO database.
However, it takes 30-40 minutes mostly.
Kindly advice how I can reduce the time taken to a few minutes at the max.
Also, how often does multipathd update the MPIO database.
Basically, I am trying to remove the stale LUN as soon as possible from the database (say 5-8 seconds)
Is there any way to ensure/force that.
Any help will be really appreciated.
regards,
Adarsh.
Setup:
=====
RHEL 5.6 (Linux x336-207-59 2.6.18-238.9.1.el5)
Multipath tools: 0.4.7
multipath.conf:
============
defaults {
user_friendly_names no
max_fds max
queue_without_daemon no
pg_prio_calc avg
flush_on_last_del yes
}
blacklist {
wwid SIBM-ESXSMAW3073NC_FDAR9P6402P4G
wwid SIBM-ESXSMAW3073NC_FDAR9P6402PU9
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^hd[a-z]"
devnode "^cciss.*"
}
devices {
device {
vendor "NETAPP"
product "LUN"
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
prio_callout "/sbin/mpath_prio_alua /dev/%n"
hardware_handler "0"
failback immediate
flush_on_last_del yes
}
}
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