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
hi,
AIX 5.3
For any command(say tar command) I am getting 100% busy for my hdisk.
But my CPU and Memory is not busy and have more idle also.
Please advice for any performance analysing.
Thanks in Advance, (3 Replies)
Hi,
I'm posting my question here as I fele that what I am about to try to do must have been done already, and I don't want to re-invent the wheel.
I have recently become responsible for monitoring disk space usage for a large file system.
I would like to geenrate reports that will summise... (8 Replies)
Hi,
(AIX 5.1)
Is there any way to find the epoch timestamp for a file without having to use fancy perl (or similar) scripts? If anyone knows of a way to do this using just ksh commands it would be appreciated.
(It also appears I don't have the stat command available).
Alternatively is... (3 Replies)
I have several users connecting via a Windows-based SSH\telnet client. The previous sysadmin used FacetTerm to allow certain users to switch between multiple "windows." I'm told there are AIX-native ways to do this but I work with what I inherited.
Originally, many users were still connecting... (3 Replies)
Hi,
We have a filesystem mystery on our hands. Given:
2 machines, A and Aa.
Machine Aa is the problem machine.
Machine A is running Ubuntu, kernel 2.6.22.9 #1 SMP Wed Feb 20 08:46:16 CST 2008 x86_64 GNU/Linux. Machine Aa is running RHEL5.3, kernel 2.6.18-128.el5 #1 SMP Wed Dec 17 11:41:38... (2 Replies)
Hello all,
Below is scripts to find the file following by:
30 days <- How many total file space within 30 days and not quantity
90 days
120 days
1 year
From here also I can get data space to put on PIE Chart. Following this scripts can I do some enhance from this scripts like do... (1 Reply)
Hi,
Am doing an enhancements related to monitoring a Linux disk I/O statistics.
The /proc/diskstats file is used to get the each disk I/O statistics. But, It returns the raw value.
How to calculate the Disk Queue Length and Disk Busy time from the raw values.
Guide me. (1 Reply)
hello folks,
I have a 300GB ROOTVG volume groups with one filesystem /backup having 200GB allocated space
Now, I cannot alt disk clone or mirrorvg this hdisk with another smaller disk. The disk size has to be 300GB; I tried alt disk clone and mirrorvg , it doesn't work. you cannot copy LVs as... (9 Replies)
Please help with command to check the busy % for a hard disk device like hdisk5
Best regards,
Vishal (7 Replies)
Discussion started by: Vishal_dba
7 Replies
LEARN ABOUT NETBSD
lvresize
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)