Reputation: 71
I need a for monitoring ALL disk i/o rates on Linux using bash, awk, sed. The problem is that it must return one row per time interval (so this one row should contain: tps
, kB_read/s
, kB_wrtn/s
, kB_read
, kB_wrtn
, but summarized per all disks).
Natural choice here is of course:
-d -k -p $interval $loops
To limit it to all disks I use:
-d -k -p `parted -l | grep Disk | cut -f1 -d: | cut -f2 -d' '`
Now the nice trick to summarize columns:
-d -k -p `parted -l | grep Disk | cut -f1 -d: | cut -f2 -d' '` > /tmp/jPtafDiskIO.txt
echo `date +"%H:%M:%S"`,`awk 'FNR>2' /tmp/jPtafDiskIO.txt | awk 'BEGIN {FS=OFS=" "}NR == 1 { n1 = $2; n2 = $3; n3 = $4; n4 = $5; n5 = $6; next } { n1 += $2; n2 += $3; n3 += $4; n4 += $5; n5 += $6 } END { print n1","n2","n3","n4","n5 }'` >> diskIO.log
I am almost there, however this (running in the loop) makes being invoked each time from beginning, so I don't get the statistics from interval to interval, but always averages (so each invoke brings me pretty the same output).
I know it sounds complicated, but maybe somebody has an idea? Maybe totally different approach? Thx.
EDIT:
Sample input (/tmp/jPtafDiskIO.txt):
> Linux 2.6.18-194.el5 (hostname) 08/25/2012
>
> Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
> sda 0.00 0.00 0.00 35655 59
> sda2 0.00 0.00 0.00 67 272
> sda1 0.00 0.00 0.00 521 274
> sdb 52.53 0.56 569.40 20894989
> 21065384388 sdc 1.90 64.64 10.93
> 2391333384 404432217 sdd 0.00 0.00 0.04
> 17880 1343028
Output diskIO.log:
16:53:12,54.43,65.2,580.37,2412282496,21471160238
Upvotes: 1
Views: 4502
Reputation: 7187
dstat
might be what you're looking for. It has a lot of things it can report on, with some common ones displayed by default.
Upvotes: 2