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### Author: Dag Wieers <dag$wieers,com>
class dstat_plugin(dstat):
"""
Total amount of read and write throughput (in bytes) on a GPFS filesystem.
"""
def __init__(self):
self.name = 'gpfs i/o'
self.nick = ('read', 'write')
self.vars = ('_br_', '_bw_')
def check(self):
if os.access('/usr/lpp/mmfs/bin/mmpmon', os.X_OK):
try:
self.stdin, self.stdout, self.stderr = dpopen('/usr/lpp/mmfs/bin/mmpmon -p -s')
self.stdin.write('reset\n')
readpipe(self.stdout)
except IOError:
raise Exception, 'Cannot interface with gpfs mmpmon binary'
return True
raise Exception, 'Needs GPFS mmpmon binary'
def extract(self):
try:
self.stdin.write('io_s\n')
# readpipe(self.stderr)
for line in readpipe(self.stdout):
if not line: continue
l = line.split()
for name in self.vars:
self.set2[name] = long(l[l.index(name)+1])
for name in self.vars:
self.val[name] = (self.set2[name] - self.set1[name]) * 1.0 / elapsed
except IOError, e:
if op.debug > 1: print '%s: lost pipe to mmpmon, %s' % (self.filename, e)
for name in self.vars: self.val[name] = -1
except Exception, e:
if op.debug > 1: print '%s: exception %s' % (self.filename, e)
for name in self.vars: self.val[name] = -1
if step == op.delay:
self.set1.update(self.set2)
# vim:ts=4:sw=4:et