Updating subject line.
regards,
Adarsh.
On 27 April 2012 13:43, Adarsh <adarshanto@xxxxxxxxx> wrote:
Hello,Please note that when I remove a LUN, I will follow the "Clean Device Removal"However, sometimes people won't follow those steps.I want to handle such scenarios gracefully.regards,Adarsh.On 27 April 2012 12:58, Adarsh <adarshanto@xxxxxxxxx> wrote:
Hello,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 nomax_fds maxqueue_without_daemon nopg_prio_calc avgflush_on_last_del yes}blacklist {wwid SIBM-ESXSMAW3073NC_FDAR9P6402P4Gwwid SIBM-ESXSMAW3073NC_FDAR9P6402PU9devnode "^(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 immediateflush_on_last_del yes}}
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