Hi all, hope you are having a nice day, its nice and warm today in Canberra Australia.
iostat -e / -E reports soft and hard errors. Any idea what these are exactly? All I hear are I/O's failing and needing to retry, but no cause as to why they fail.
My SUN guru tells me its our EMC SAN... (1 Reply)
Hi all,
i have run iostat -em, and get below result. Can i know what is this output meaning, and how to fix that problem.
iostat -em
---- errors ---
device s/w h/w trn tot
sd7 0 1 0 1
sd8 1 1 0 2
sd9 0 1 0 1
sd10 0 ... (2 Replies)
Here is my file name countries
USSR 8650 262 Asia
Canada 3852 24 North America
China 3692 866 Asia
USA 3615 219 North America
Brazil 3286 116 South America
India 1269 637 Asia
Argentina 1072 ... (8 Replies)
So I use Cacti for monitoring IO statistics on my servers, now originally I couldnt monitor Multipath deviced servers as they have alot of /dev/sdxx and /dev/emcpowerxx, I have devised a method of trimming them down to just the actual devices but the issue is the output looks like so.
# iostat... (0 Replies)
Friends,
.
On linux i have to run iostat command and in each iteration have to print the greatest value in each column.
e.g
iostat -dt -kx 2 2 | awk ' !/sd/ &&!/%util/ && !/Time/ && !/Linux/ {print $12}'
4.38
0.00
0.00
0.00
What i would like to print is only the... (3 Replies)
Hi Guys,
Please help me out in my situation of writing a shell script
Exampl:I have a output like
asnapply 1 2 3 apply_server=1 apply_schema=ASN
asnapply 1 2 3 apply_server=2 apply_schema=ASN
Now i need output like
asnacmd applysever=1 applyschema=ASN stop
asnacmd applysever=2... (16 Replies)
Hello,
I have a file with two fields. The first field repeats itself for quite a while but the second field changes. What I want to do is to go through the first column until its value changes (and while it doesn't, verify that the second field is in a sequence from 0-15).
Example input:
... (13 Replies)
Hi Guys,
I've been having some arguments with my colleagues about one thing. Always my thought was that as as far as disk performance is concern by looking at the output of the iostat command (AIX) you would be able to identify if you have a hot disk and then by moving some files out that disk... (3 Replies)
Noticed that asvc_t values in iostat command outputs are mostly more than 100 in our previous iostat analysis.
Also found the following detail from an alternate site IO Bottleneck - Disk performance issue - UnixArena
----
1. asvc_t average service time of active transactions, in... (2 Replies)
Discussion started by: saraperu
2 Replies
LEARN ABOUT ULTRIX
iostat
iostat(1) General Commands Manual iostat(1)Name
iostat - report I/O statistics
Syntax
iostat [ -c ] [ -t ] [ disknames ] [ interval ] [ count ]
Description
The command reports I/O statistics for terminals, disks and cpus. For terminals the number of input and output characters are counted.
For disks the number of 512 byte blocks per second and number of transfers per second are displayed. For cpus, it provides the percentage
of time the system has spent in user mode, in user mode running low priority (niced) processes, in system mode, and idling. On multipro-
cessor systems these cpu statistics represent a cumulative summary of all the cpus.
The optional disknames argument causes disk statistics to be displayed for the specified disks. If this argument is not specified then
disk statistics will be displayed for the first 3 disks only.
The optional interval argument causes to report once each interval seconds. The first report is for all time since a reboot and each sub-
sequent report is for the last interval only.
The optional count argument restricts the number of reports.
Options-c Displays the percentage of time each cpu spent in user mode, running low priority (nice'd) processes, in system mode, and idling.
-t Displays the number of characters read from and written to terminals.
Examples
This example will cause cpu and disk statistics for the 5 disks ra0, ra1, ra2, ra3, and ra4.
iostat ra0 ra1 ra2 ra3 ra4
This example will cause cpu, terminal, and disk statistics for ra0 to be displayed and updated every 2 seconds.
iostat -t ra0 2
FilesSee Alsovmstat(1), cpustat(1)iostat(1)