-#!/usr/bin/env python
+#!/usr/bin/python
# -*- python-mode -*-
"""Emulate iostat for NFS mount points using /proc/self/mountstats
"""
"""
import sys, os, time
+from optparse import OptionParser, OptionGroup
Iostats_version = '0.2'
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 ' 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),
# Functions
#
-def print_iostat_help(name):
- print 'usage: %s [ <interval> [ <count> ] ] [ <options> ] [ <mount point> ] ' % name
- print
- print ' Version %s' % Iostats_version
- print
- print ' Sample iostat-like program to display NFS client per-mount statistics.'
- print
- print ' The <interval> parameter specifies the amount of time in seconds between'
- print ' each report. The first report contains statistics for the time since each'
- print ' file system was mounted. Each subsequent report contains statistics'
- print ' collected during the interval since the previous report.'
- print
- print ' If the <count> parameter is specified, the value of <count> determines the'
- print ' number of reports generated at <interval> seconds apart. If the interval'
- print ' parameter is specified without the <count> parameter, the command generates'
- print ' reports continuously.'
- print
- print ' Options include "--attr", which displays statistics related to the attribute'
- print ' cache, "--dir", which displays statistics related to directory operations,'
- print ' and "--page", which displays statistics related to the page cache.'
- print ' By default, if no option is specified, statistics related to file I/O are'
- print ' displayed.'
- print
- print ' If one or more <mount point> names are specified, statistics for only these'
- print ' mount points will be displayed. Otherwise, all NFS mount points on the'
- print ' client are listed.'
-
def parse_stats_file(filename):
"""pop the contents of a mountstats file into a dictionary,
keyed by mount point. each value object is a list of the
return ms_dict
def print_iostat_summary(old, new, devices, time, ac):
- for device in devices:
+ if old:
+ # Trim device list to only include intersection of old and new data,
+ # this addresses umounts due to autofs mountpoints
+ devicelist = filter(lambda x:x in devices,old)
+ else:
+ devicelist = devices
+
+ for device in devicelist:
stats = DeviceData()
stats.parse_stats(new[device])
if not old:
diff_stats = stats.compare_iostats(old_stats)
diff_stats.display_iostats(time, ac)
+def list_nfs_mounts(givenlist, mountstats):
+ """return a list of NFS mounts given a list to validate or
+ return a full list if the given list is empty -
+ may return an empty list if none found
+ """
+ list = []
+ if len(givenlist) > 0:
+ for device in givenlist:
+ stats = DeviceData()
+ stats.parse_stats(mountstats[device])
+ if stats.is_nfs_mountpoint():
+ list += [device]
+ else:
+ for device, descr in mountstats.iteritems():
+ stats = DeviceData()
+ stats.parse_stats(descr)
+ if stats.is_nfs_mountpoint():
+ list += [device]
+ return list
+
def iostat_command(name):
"""iostat-like command for NFS mount points
"""
mountstats = parse_stats_file('/proc/self/mountstats')
devices = []
- which = 0
+ origdevices = []
interval_seen = False
count_seen = False
- for arg in sys.argv:
- if arg in ['-h', '--help', 'help', 'usage']:
- print_iostat_help(name)
- return
-
- if arg in ['-v', '--version', 'version']:
- print '%s version %s' % (name, Iostats_version)
- return
-
- if arg in ['-a', '--attr']:
- which = 1
- continue
-
- if arg in ['-d', '--dir']:
- which = 2
- continue
-
- if arg in ['-p', '--page']:
- which = 3
- continue
+ mydescription= """
+Sample iostat-like program to display NFS client per-mount'
+statistics. The <interval> parameter specifies the amount of time in seconds
+between each report. The first report contains statistics for the time since
+each file system was mounted. Each subsequent report contains statistics
+collected during the interval since the previous report. If the <count>
+parameter is specified, the value of <count> determines the number of reports
+generated at <interval> seconds apart. If the interval parameter is specified
+without the <count> parameter, the command generates reports continuously.
+If one or more <mount point> names are specified, statistics for only these
+mount points will be displayed. Otherwise, all NFS mount points on the
+client are listed.
+"""
+ parser = OptionParser(
+ usage="usage: %prog [ <interval> [ <count> ] ] [ <options> ] [ <mount point> ]",
+ description=mydescription,
+ version='version %s' % Iostats_version)
+ parser.set_defaults(which=0)
+
+ statgroup = OptionGroup(parser, "Statistics Options",
+ 'File I/O is displayed unless one of the following is specified:')
+ statgroup.add_option('-a', '--attr',
+ action="store_const",
+ dest="which",
+ const=1,
+ help='displays statistics related to the attribute cache')
+ statgroup.add_option('-d', '--dir',
+ action="store_const",
+ dest="which",
+ const=2,
+ help='displays statistics related to directory operations')
+ statgroup.add_option('-p', '--page',
+ action="store_const",
+ dest="which",
+ const=3,
+ help='displays statistics related to the page cache')
+ parser.add_option_group(statgroup)
+
+ (options, args) = parser.parse_args(sys.argv)
+
+ for arg in args:
if arg == sys.argv[0]:
continue
if arg in mountstats:
- devices += [arg]
+ origdevices += [arg]
elif not interval_seen:
- interval = int(arg)
+ try:
+ interval = int(arg)
+ except:
+ print 'Illegal <interval> value %s' % arg
+ return
if interval > 0:
interval_seen = True
else:
- print 'Illegal <interval> value'
+ print 'Illegal <interval> value %s' % arg
return
elif not count_seen:
- count = int(arg)
+ try:
+ count = int(arg)
+ except:
+ print 'Ilegal <count> value %s' % arg
+ return
if count > 0:
count_seen = True
else:
- print 'Illegal <count> value'
+ print 'Illegal <count> value %s' % arg
return
# make certain devices contains only NFS mount points
- if len(devices) > 0:
- check = []
- for device in devices:
- stats = DeviceData()
- stats.parse_stats(mountstats[device])
- if stats.is_nfs_mountpoint():
- check += [device]
- devices = check
- else:
- for device, descr in mountstats.iteritems():
- stats = DeviceData()
- stats.parse_stats(descr)
- if stats.is_nfs_mountpoint():
- devices += [device]
+ devices = list_nfs_mounts(origdevices, mountstats)
if len(devices) == 0:
print 'No NFS mount points were found'
return
+
old_mountstats = None
sample_time = 0.0
if not interval_seen:
- print_iostat_summary(old_mountstats, mountstats, devices, sample_time, which)
+ print_iostat_summary(old_mountstats, mountstats, devices, sample_time, options.which)
return
if count_seen:
while count != 0:
- print_iostat_summary(old_mountstats, mountstats, devices, sample_time, which)
+ print_iostat_summary(old_mountstats, mountstats, devices, sample_time, options.which)
old_mountstats = mountstats
time.sleep(interval)
sample_time = interval
mountstats = parse_stats_file('/proc/self/mountstats')
+ # automount mountpoints add and drop, if automount is involved
+ # we need to recheck the devices list when reparsing
+ devices = list_nfs_mounts(origdevices,mountstats)
+ if len(devices) == 0:
+ print 'No NFS mount points were found'
+ return
count -= 1
else:
while True:
- print_iostat_summary(old_mountstats, mountstats, devices, sample_time, which)
+ print_iostat_summary(old_mountstats, mountstats, devices, sample_time, options.which)
old_mountstats = mountstats
time.sleep(interval)
sample_time = interval
mountstats = parse_stats_file('/proc/self/mountstats')
+ # automount mountpoints add and drop, if automount is involved
+ # we need to recheck the devices list when reparsing
+ devices = list_nfs_mounts(origdevices,mountstats)
+ if len(devices) == 0:
+ print 'No NFS mount points were found'
+ return
#
# Main
projects / nfs-utils.git / blobdiff