65 lines
1.8 KiB
Bash
Executable file
65 lines
1.8 KiB
Bash
Executable file
#!/bin/sh
|
|
#
|
|
# Display most relevant iostat bandwidth/latency numbers. The output is
|
|
# dependent on the name of the script/symlink used to call it.
|
|
#
|
|
|
|
helpstr="
|
|
iostat: Show iostat values since boot (summary page).
|
|
iostat-1s: Do a single 1-second iostat sample and show values.
|
|
iostat-10s: Do a single 10-second iostat sample and show values."
|
|
|
|
script=$(basename "$0")
|
|
if [ "$1" = "-h" ] ; then
|
|
echo "$helpstr" | grep "$script:" | tr -s '\t' | cut -f 2-
|
|
exit
|
|
fi
|
|
|
|
if [ "$script" = "iostat-1s" ] ; then
|
|
# Do a single one-second sample
|
|
extra="1 1"
|
|
# Don't show summary stats
|
|
y="-y"
|
|
elif [ "$script" = "iostat-10s" ] ; then
|
|
# Do a single ten-second sample
|
|
extra="10 1"
|
|
# Don't show summary stats
|
|
y="-y"
|
|
fi
|
|
|
|
if [ -f "$VDEV_UPATH" ] ; then
|
|
# We're a file-based vdev, iostat doesn't work on us. Do nothing.
|
|
exit
|
|
fi
|
|
|
|
out=$(eval "iostat $y -k -x $VDEV_UPATH $extra")
|
|
|
|
# Sample output (we want the last two lines):
|
|
#
|
|
# Linux 2.6.32-642.13.1.el6.x86_64 (centos68) 03/09/2017 _x86_64_ (6 CPU)
|
|
#
|
|
# avg-cpu: %user %nice %system %iowait %steal %idle
|
|
# 0.00 0.00 0.00 0.00 0.00 100.00
|
|
#
|
|
# Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
|
|
# sdb 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
|
|
#
|
|
|
|
# Get the column names
|
|
cols=$(echo "$out" | grep Device)
|
|
|
|
# Get the values and tab separate them to make them cut-able.
|
|
vals="$(echo "$out" | grep -A1 Device | tail -n 1 | sed -r 's/[[:blank:]]+/\t/g')"
|
|
|
|
i=0
|
|
for col in $cols ; do
|
|
i=$((i+1))
|
|
# Skip the first column since it's just the device name
|
|
if [ "$col" = "Device:" ] ; then
|
|
continue
|
|
fi
|
|
|
|
# Get i'th value
|
|
val=$(echo "$vals" | cut -f "$i")
|
|
echo "$col=$val"
|
|
done
|