how to make iostat behave like top

Question

iostat -xzN 5 | grep "^vg\|^Dev" produces output like:

Device:         rrqm/s   wrqm/s     r/s     w/s   rsec/s   wsec/s avgrq-sz avgqu-sz   await  svctm  %util
vg01-root         0.00     0.00    0.00    0.20     0.00     1.60     8.00     0.00    3.00   3.00   0.06
vg05-vz           0.00     0.00    0.00    0.60     0.00     4.80     8.00     0.01    9.00   9.00   0.54
vg03-vz           0.00     0.00  281.00  128.40  5625.60  1027.20    16.25    42.35  103.54   2.44  99.94
vg02-vz2a         0.00     0.00   28.20   11.40  1416.00   112.00    38.59     0.79   19.84   5.99  23.72
Device:         rrqm/s   wrqm/s     r/s     w/s   rsec/s   wsec/s avgrq-sz avgqu-sz   await  svctm  %util
vg05-vz           0.00     0.00    0.00    8.60     0.00  7876.80   915.91     0.48   55.70   3.40   2.92
vg03-vz           0.00     0.00  308.20   76.20 10376.00  4433.60    38.53    11.50   30.00   2.60 100.00
vg02-vz2a         0.00     0.00   27.80   24.80   604.80   198.40    15.27     0.49    9.39   4.89  25.72
Device:         rrqm/s   wrqm/s     r/s     w/s   rsec/s   wsec/s avgrq-sz avgqu-sz   await  svctm  %util
vg05-vz           0.00     0.00    0.00    1.80     0.00   585.60   325.33     0.01    5.78   4.00   0.72
vg03-vz           0.00     0.00  323.20   49.00  9283.20   497.60    26.28     3.48    9.40   2.69  99.98
vg02-vz2a         0.00     0.00   40.20   55.80  2644.80   483.20    32.58     1.14   11.86   4.12  39.58

I'd like this to display like top i.e. clear screen and start from the top on each iteration. I'm thinking if there was a way to pipe this through sed/awk/perl/whatever and every time you get ^Dev push a tput clear.

But how?

Jeffrey Hantin · Accepted Answer · 2012-12-06T09:11:55.957

3

Have you considered iotop instead?

That said, it shouldn't be too hard to hurl some rough Perl.

#!/usr/bin/perl

# Adjust options to taste.
open(IOSTAT, "iostat -d 5 |") || die;

$| = 1;
while(<IOSTAT>) {
    if (/^Dev/) { system "clear"; print; }
    if (/^vg/) { print; }
}

edited Dec 06 '12 at 09:11

answered Dec 06 '12 at 08:59

Jeffrey Hantin

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Thanks for that. Was kinda looking for a one-liner but this will do. I have iotop as well but have not found any way to monitor IO per disk device with that. – Dokbua Dec 06 '12 at 10:16

score 0 · Answer 2 · answered Nov 23 '20 at 02:11

0

Following up on Jeffrey Hantin's response, here's a one-liner version:

S_COLORS=always iostat -hz 5 | perl -pe '/avg/ && system(q[clear])'

answered Nov 23 '20 at 02:11

Diab Jerius

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score 0 · Answer 3 · answered Nov 04 '21 at 11:23

0

Just let watch do the work for you:

watch -n<interval> iostat`

answered Nov 04 '21 at 11:23

smichak

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how to make iostat behave like top

3 Answers3