Details
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Improvement
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Resolution: Unresolved
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Minor
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None
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Professional Edition
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None
Description
when monitoring large unix (debian/ubuntu) systems with numerous drives (in the hundreds) which also have multi-pathing the drive i/o display becomes useless in operation as there are numerous duplicate entries.
for example you have a disk (WWID 0x5000c500747f043a) this drive could show up as a block device numerous times. Simple case if you have a dual-path to the drive it could be /dev/sda & /dev/sdb, plus would show up as a device mapper /dev/dm0 as an example. So with 1 disk you have 3 copies of it.
If you are able to override this default look /dev/ for block devices to either select the /dev/disk/by-* (by-id; by-path; by-uuid; etc) OR (what would work better in our environment which has a lot of multi-pathing, to use /dev/mapper devices which are identified by local and static designations (i.e. /dev/mapper/c0t0d01 which wouild always map to the same disk by the local multipath.conf configuration file.
What I am thinking is to use some type of local unix-agent override similar to how devices are specified in ioping.cnf or similar).