New upstream version 0.7.2

[mirror_zfs-debian.git] / cmd / zpool / zpool.d / iostat

diff --git a/cmd/zpool/zpool.d/iostat b/cmd/zpool/zpool.d/iostat
new file mode 100755 (executable)
index 0000000..f6452fb
--- /dev/null
+++ b/cmd/zpool/zpool.d/iostat
@@ -0,0 +1,65 @@
+#!/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