Another patch to nfsiostat. This time so that it can be run from collectd. Add the following to your collectd.conf to make it happen. LoadPlugin Exec <Plugin exec> Exec "nobody" "/usr/local/bin/nfsiostat.collectd" "20" "/nfs/mountpoint" </Plugin>

nfsio-collectd.patch

--- /usr/sbin/nfsiostat	2012-04-09 13:21:11.000000000 +0100
+++ nfsiostat.collectd	2013-01-16 16:23:24.020173069 +0000
@@ -22,6 +22,8 @@
 """
 
 import sys, os, time
+import socket
+from datetime import datetime
 from optparse import OptionParser, OptionGroup
 
 Iostats_version = '0.2'
@@ -350,16 +352,19 @@
             rtt_per_op = 0.0
             exe_per_op = 0.0
 
-        op += ':'
-        print '%s' % op.lower().ljust(15),
-        print '  ops/s\t\t   kB/s\t\t  kB/op\t\tretrans\t\tavg RTT (ms)\tavg exe (ms)'
-
-        print '\t\t%7.3f' % (ops / sample_time),
-        print '\t%7.3f' % (kilobytes / sample_time),
-        print '\t%7.3f' % kb_per_op,
-        print ' %7d (%3.1f%%)' % (retrans, retrans_percent),
-        print '\t%7.3f' % rtt_per_op,
-        print '\t%7.3f' % exe_per_op
+
+	rw = op.lower().ljust(15).strip()
+	seconds = datetime.now().strftime("%s")
+	hostname = socket.getfqdn().replace(".","_")
+        export = self.__nfs_data['mountpoint'].replace("/","_")
+	prefix = 'PUTVAL %s/nfsio-%s' % (hostname, export)
+
+	print '%s/gauge-operations-%s %s:%.3f' % (prefix, rw, seconds, ops / sample_time)
+	print '%s/bytes-%s %s:%.3f' % (prefix, rw, seconds, kilobytes / sample_time * 1024)
+	print '%s/bytes-per_op-%s %s:%.3f' % (prefix, rw, seconds, kb_per_op * 1024)
+	print '%s/gauge-retrans-%s %s:%d' % (prefix, rw, seconds, retrans)
+	print '%s/gauge-rtt_per_op-%s %s:%.3f' % (prefix, rw, seconds, rtt_per_op)
+	print '%s/gauge-exe_per_op-%s %s:%.3f' % (prefix, rw, seconds, exe_per_op)
 
     def ops(self, sample_time):
         sends = float(self.__rpc_data['rpcsends'])
@@ -384,14 +389,13 @@
         else:
             backlog = 0.0
 
-        print
-        print '%s mounted on %s:' % \
-            (self.__nfs_data['export'], self.__nfs_data['mountpoint'])
-        print
 
-        print '   op/s\t\trpc bklog'
-        print '%7.2f' % (sends / sample_time), 
-        print '\t%7.2f' % backlog
+	seconds = datetime.now().strftime("%s")
+	hostname = socket.getfqdn().replace(".","_")
+        export = self.__nfs_data['mountpoint'].replace("/","_")
+	prefix = 'PUTVAL %s/nfsio-%s' % (hostname, export)
+	print '%s/gauge-sends_per_second %s:%.2f' % (prefix, seconds, sends / sample_time)
+	print '%s/gauge-backlog %s:%.2f' % (prefix, seconds, backlog)
 
         if which == 0:
             self.__print_rpc_op_stats('READ', sample_time)