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Operating Systems AIX Need to know %age disk busy on AIX Post 302887027 by rbatte1 on Wednesday 5th of February 2014 06:35:38 AM
Old 02-05-2014
Have a look at filemon

You can get a split down of busy logical volumes from that which might give you a better clue on narrowing it down. Something like this might help when the errors are starting to be logged:-
Code:
# filemon -vo /tmp/filename
# sleep 300
# trcstop

You can then inspect filename and see what you have in the Logical Volume section and see if anything enlightens you.

There is less point in running it for longer period as the critical bit will get lost in the general IO of other operations, but you might want to adjust the sleep to get a variety of views. You could even call this in a loop and write to a succession of log files to get a longer picture and it might be possible to translate the output into a CSV and import it to something to draw a graph.



I hope that this helps
Robin
Liverpool/Blackburn
UK
This User Gave Thanks to rbatte1 For This Post:
 

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LVRESIZE(8)						      System Manager's Manual						       LVRESIZE(8)

NAME
lvresize - resize a logical volume SYNOPSIS
lvresize [--alloc AllocationPolicy] [-A|--autobackup y|n] [-d|--debug] [-h|-?|--help] [-i|--stripes Stripes [-I|--stripesize StripeSize]] {-l|--extents [+]LogicalExtentsNumber[%{VG|LV|PVS|FREE}] | -L|--size [+]LogicalVolumeSize[kKmMgGtT]} [-t|--test] [-v|--verbose] LogicalVol- umePath [PhysicalVolumePath...] DESCRIPTION
lvresize allows you to resize a logical volume. Be careful when reducing a logical volume's size, because data in the reduced part is lost!!! You should therefore ensure that any filesystem on the volume is shrunk first so that the extents that are to be removed are not in use. Resizing snapshot logical volumes (see lvcreate(8) for information about creating snapshots) is supported as well. But to change the number of copies in a mirrored logical volume use lvconvert(8). OPTIONS
See lvm for common options. -l, --extents [+|-]LogicalExtentsNumber[%{VG|LV|PVS|FREE}] Change or set the logical volume size in units of logical extents. With the + or - sign the value is added to or subtracted from the actual size of the logical volume and without it, the value is taken as an absolute one. The number can also be expressed as a percentage of the total space in the Volume Group with the suffix %VG, relative to the existing size of the Logical Volume with the suffix %LV, as a percentage of the remaining free space of the PhysicalVolumes on the command line with the suffix %PVS, or as a percentage of the remaining free space in the Volume Group with the suffix %FREE. -L, --size [+|-]LogicalVolumeSize[kKmMgGtTpPeE] Change or set the logical volume size in units of megabytes. A size suffix of M for megabytes, G for gigabytes, T for terabytes, P for petabytes or E for exabytes is optional. With the + or - sign the value is added to or subtracted from the actual size of the logical volume and without it, the value is taken as an absolute one. -i, --stripes Stripes Gives the number of stripes to use when extending a Logical Volume. Defaults to whatever the last segment of the Logical Volume uses. Not applicable to LVs using the original metadata LVM format, which must use a single value throughout. -I, --stripesize StripeSize Gives the number of kilobytes for the granularity of the stripes. Defaults to whatever the last segment of the Logical Volume uses. Not applicable to LVs using the original metadata LVM format, which must use a single value throughout. StripeSize must be 2^n (n = 2 to 9) SEE ALSO
lvm(8), lvconvert(8), lvcreate(8), lvreduce(8), lvchange(8) Sistina Software UK LVM TOOLS 2.02.44-cvs (02-17-09) LVRESIZE(8)
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