Hi Daniel
This is significantly different to the Solaris output. Linux gives a few extra fields, and leaves out a few that Solaris has. We may need to play with this to find some common ground. Alternatively, we just accept and embrace the differences, and add a few extra graphs. We then set a SUBTEST string within the case statement. The loop will then be for subtest in $SUBTEST
The output I used was as below. Make yours look similar, and we have a winner.
The output then gets massaged a little with this set of commands (commented for clarity) cat $TEMPFILE.raw | awk "NR>$LINE" \ # take only the last set | sed "s/,/ /g" \ # make it space seperated | awk '{ print $NF" "$0 }' \ # move device name to front | awk '{ $NF="";print }' > $TEMPFILE.data # Dump the device name at the end
iostat -xrn 2 2 extended device statistics r/s,w/s,kr/s,kw/s,wait,actv,wsvc_t,asvc_t,%w,%b,device 1.4,3.9,93.0,68.8,0.0,0.2,0.0,47.0,0,3,vdc0 0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.2,0,0,vdc1 1.4,4.0,92.8,68.8,0.0,0.3,0.0,61.0,0,4,vdc2 0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0,0,blackbox:/data/scratch 0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0,0,infdomB1:/export/DRhome 0.0,0.0,0.0,0.0,0.0,0.0,0.0,1.7,0,0,infdomB1:/export/home 0.0,0.0,0.0,0.0,0.0,0.0,0.0,9.1,0,0,infdomD2:/data/software extended device statistics r/s,w/s,kr/s,kw/s,wait,actv,wsvc_t,asvc_t,%w,%b,device 0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0,0,vdc0 0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0,0,vdc1 0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0,0,vdc2 0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0,0,blackbox:/data/scratch 0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0,0,infdomB1:/export/DRhome 0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0,0,infdomB1:/export/home 0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0,0,infdomD2:/data/software
From man iostat -n Display names in descriptive format. For exam- ple, cXtYdZ, rmt/N, server:/export/path. -r Display data in a comma-separated format. -x Report extended disk statistics.
Output The output of the iostat utility includes the following information.
device name of the disk
r/s reads per second
w/s writes per second
kr/s kilobytes read per second
The average I/O size during the interval can be
computed from kr/s divided by r/s.
kw/s kilobytes written per second
The average I/O size during the interval can be
computed from kw/s divided by w/s.
wait average number of transactions waiting for service
(queue length)
This is the number of I/O operations held in the
device driver queue waiting for acceptance by the
device.
actv average number of transactions actively being ser-
viced (removed from the queue but not yet com-
pleted)
This is the number of I/O operations accepted, but
not yet serviced, by the device.
svc_t average response time of transactions, in mil-
liseconds
The svc_t output reports the overall response
time, rather than the service time, of a device.
The overall time includes the time that transac-
tions are in queue and the time that transactions
are being serviced. The time spent in queue is
shown with the -x option in the wsvc_t output
column. The time spent servicing transactions is
the true service time. Service time is also shown
with the -x option and appears in the asvc_t out-
put column of the same report.
%w percent of time there are transactions waiting for
service (queue non-empty)
%b percent of time the disk is busy (transactions in
progress)
wsvc_t average service time in wait queue, in mil-
liseconds
asvc_t average service time of active transactions, in
milliseconds
wt the I/O wait time is no longer calculated as a
percentage of CPU time, and this statistic will
always return zero.Cheers Vernon
On Wed, Sep 15, 2010 at 10:27 PM, Daniel Bourque <dbourque at weatherdata.com>wrote:
here is a sample run. $ iostat -xd 5 2 Linux 2.6.18-92.1.22.el5PAE (host.bla.com) 09/15/2010
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util sda 0.00 0.00 0.00 0.00 0.07 0.00 92.89 0.00 4.31 3.78 0.00 sdb 23.63 8.98 21.65 27.30 14.39 120.96 2.77 0.10 1.95 1.55 7.59 dm-0 0.00 0.00 0.11 3.01 2.27 24.08 8.44 0.04 11.50 1.04 0.32 dm-1 0.00 0.00 0.34 1.80 6.38 14.38 9.71 0.02 10.15 1.59 0.34 dm-2 0.00 0.00 0.00 0.33 0.01 2.62 8.00 0.00 7.70 3.09 0.10 dm-3 0.00 0.00 0.47 28.77 33.15 90.77 4.24 0.06 2.03 0.17 0.51 dm-4 0.00 0.00 0.00 0.00 0.00 0.00 8.00 0.00 18.27 2.54 0.00 dm-5 0.00 0.00 44.45 2.42 111.93 123.38 5.02 0.02 0.37 1.59 7.45 drbd0 0.00 0.00 44.45 128.36 111.89 51.42 4.88 0.10 3.45 3.94 13.17
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util sda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 sdb 0.00 35.40 3.80 69.20 32.00 821.20 11.69 0.04 0.59 0.52 3.76 dm-0 0.00 0.00 0.20 2.80 3.20 22.40 8.53 0.00 1.13 1.13 0.34 dm-1 0.00 0.00 0.00 1.80 0.00 14.40 8.00 0.00 0.00 0.00 0.00 dm-2 0.00 0.00 0.00 0.60 0.00 4.80 8.00 0.00 0.00 0.00 0.00 dm-3 0.00 0.00 0.00 2.00 0.00 16.00 8.00 0.00 0.00 0.00 0.00 dm-4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-5 0.00 0.00 3.60 97.40 28.80 761.00 7.82 0.04 0.40 0.34 3.40 drbd0 0.00 0.00 3.60 94.80 28.80 758.40 8.00 0.09 0.96 0.56 5.48
I whish the maintainer of iostat would add a friendly name option, it would not be so hard to code a device-mapper -> LVM translation using "dmsetup ls" , problem is you can only run that command as root. ( guess you could add a sudo rule... )
anyways, if you don't find the time to work on this, just just provide a sample output of solaris's /usr/bin/iostat -xrn and I'll post the changes needed to the list.
Thank !
Dan
Vernon Everett wrote:
Could give it a go. Send me the output of iostat -x 2 2 for your favourite OS(s)
Where I am now, I only have Solaris, hence the bias.
Cheers V
On Wed, Sep 15, 2010 at 5:22 AM, Daniel Bourque <dbourque at weatherdata.com<mailto: dbourque at weatherdata.com>> wrote:
Sorry I can't reply to the thread for some reason i quit receiving the emails, I checked the archive and noticed the replies to my former thread. ( thanks ! )
Vernon, since I don't run solaris here, only linux and some tru64, the -r ( csv output ) and -n ( friendly names ) options makes it hard to use your shell script since they either don't exists or don't work the same. Can you perhaps provide a same output of "iostat -xrn" and along with formated text you pass to hobbit in your check.
I can then provide a snippet of code for linux, which would provide the equivalent output. So you could just add a case in the shell script.
case
unamein Linux) /usr/bin/iostat -x $DURATION 2 | wonderful stuff > $TEMPFILE.raw ;; SunOS) /usr/bin/iostat -xrn $DURATION 2 > $TEMPFILE.raw ;; esac-- Dan
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