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#!/usr/bin/python
#
# Copyright 2005 Dean Gaudet, Ben Escoto
#
# This file is part of rdiff-backup.
#
# rdiff-backup is free software; you can redistribute it and/or modify
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#
# rdiff-backup is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with rdiff-backup; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA
import os, sys, re
import rdiff_backup.connection, rdiff_backup.regress
import rdiff_backup.rpath as rpath
import rdiff_backup.Globals as Globals
import rdiff_backup.restore as restore
tag = None # Set to an rdiff-backup session time
def check_args():
global tag
def error(msg):
sys.stderr.write("Command line error: %s\n" % (msg,))
sys.exit(2)
if not (2 <= len(sys.argv) <= 3):
error("usage: %s mirror-directory [date_tag]" % (sys.argv[0],))
Globals.rbdir = rpath.RPath(Globals.local_connection,
os.path.join(sys.argv[1], 'rdiff-backup-data'))
if not Globals.rbdir.isdir():
error("Directory %s not found" % (Globals.rbdir.path,))
if len(sys.argv) == 3: tag = sys.argv[2]
def system(cmd):
if os.system(cmd): sys.exit("Error running command '%s'\n" % (cmd,))
def get_rbdir_inc_rpath(prefix):
"""Get rp in rdiff-backup-data given prefix (either newest or with tag)"""
if tag:
rp1 = Globals.rbdir.append('%s.%s.data' % (prefix, tag))
if rp1.isreg(): return rp1
rp2 = Globals.rbdir.append('%s.%s.data.gz' % (prefix, tag))
if rp2.isreg(): return rp2
sys.exit(rp.path + " is not a regular file. Bad tag specified?")
else:
rp_base = Globals.rbdir.append(prefix)
inclist = restore.get_inclist(rp_base)
if not inclist: sys.exit("No data files in rdiff-backup-data dir "
"starting with %s were found!" % (prefix,))
inclist.sort(key = lambda i: i.getinctime())
return inclist[-1]
def print_statistics():
print "\nSession statistics:"
print get_rbdir_inc_rpath('session_statistics').get_data()
print "\nAverage statistics:"
system("rdiff-backup --calculate-average %s/session_statistics.*" %
(Globals.rbdir.path,))
def get_open_filestats():
"""Return open file object based on file_statistics"""
file_stats_rp = get_rbdir_inc_rpath('file_statistics')
assert file_stats_rp.isincfile()
fileobj = file_stats_rp.open('r', file_stats_rp.isinccompressed())
fileobj.readline()
if fileobj.readline() != ("# Filename Changed SourceSize "
"MirrorSize IncrementSize\n"):
sys.stderr.write("Format of %s may be unfamiliar\n"
% (file_stats_rp.path))
return fileobj
class FileStat:
"""Hold the information in one line of file_statistics
However, unlike file_statistics, a File can have subdirectories
under it. In that case, the information should be cumulative.
"""
def __init__(self, nametuple, changed, sourcesize, incsize):
self.nametuple = nametuple
self.changed = changed
self.sourcesize, self.incsize = sourcesize, incsize
self.children = []
def add_child(self, child):
self.children.append(child)
self.changed += child.changed
self.sourcesize += child.sourcesize
self.incsize += child.incsize
def __str__(self):
return "%s %s %s %s" % (self.nametuple, self.changed,
self.sourcesize, self.incsize)
def yield_fs_objs(filestatsobj):
"""Iterate FileStats from open file_statistics fileobj"""
r = re.compile("^(.*) ([0-9]+) ([0-9]+|NA) ([0-9]+|NA) ([0-9]+|NA)\n?$")
while 1:
line = filestatsobj.readline()
if not line: break
if line.startswith('#'): continue
match = r.match(line)
if not match:
print "Error parsing line: ", line
continue
filename = match.group(1)
if filename == '.': nametuple = ()
else: nametuple = tuple(filename.split('/'))
if match.group(3) == 'NA': sourcesize = 0
else: sourcesize = int(match.group(3))
if match.group(5) == 'NA': incsize = 0
else: incsize = int(match.group(5))
yield FileStat(nametuple, int(match.group(2)), sourcesize, incsize)
def make_tree(fs_iter, root_fs):
"""Populate a tree of FileStat objects from fs_iter
We require that the nametuple of every FileStat put into the tree
starts with the same nametuple as root_fs. Return value will be a
tuple (root fs object, overflow), where overflow is the next
FileStat object in the iterator, or None.
"""
try: fs = fs_iter.next()
except StopIteration: return (root_fs, None)
while 1:
if fs.nametuple[:len(root_fs.nametuple)] != root_fs.nametuple:
return (root_fs, fs)
subtree, fs = make_tree(fs_iter, fs)
root_fs.add_child(subtree)
if not fs: return (root_fs, None)
def make_root_tree(fs_iter):
"""Like make_tree, but assume fs_iter starts at the root"""
try: root_fs = fs_iter.next()
except StopIteration: sys.exit("No files in iterator")
assert root_fs.nametuple == (), root_fs
tree, overflow = make_tree(fs_iter, root_fs)
assert overflow is None, overflow
return tree
def get_top_fs(fs_tree, cutoff = .05, fs_func = lambda fs: fs.incsize):
"""Process the FileStat tree and find everything above the cutoff
cutoff is a fraction of the root. Of course the root will be
above the cutoff, but we try to find the most specific directories
still above the cutoff. The value of any directories that make
the cutoff will be excluded from the value of parent directories.
"""
abs_cutoff = cutoff*fs_func(fs_tree)
def helper(subtree):
"""Returns ([list of (top fs, value)], total excluded amount)"""
subtree_val = fs_func(subtree)
if subtree_val <= abs_cutoff: return ([], 0)
top_children, total_excluded = [], 0
for child in subtree.children:
top_sublist, excluded = helper(child)
top_children.extend(top_sublist)
total_excluded += excluded
current_value = subtree_val - total_excluded
if current_value >= abs_cutoff:
return ([(subtree, current_value)] + top_children, subtree_val)
else: return (top_children, total_excluded)
return helper(fs_tree)[0]
def print_top_dirs(fs_tree, label, fs_func):
"""Print the top directories in sorted order"""
def print_line(fs, val):
percentage = float(val)/fs_func(fs_tree) * 100
path = fs.nametuple and '/'.join(fs.nametuple) or '.'
print '%s (%02.1f%%)' % (path, percentage)
s = "Top directories by %s (percent of total)" % (label,)
print s + '\n' + ('-'*len(s))
top_fs_pair_list = get_top_fs(fs_tree, .05, fs_func)
top_fs_pair_list.sort(key = lambda pair: pair[1], reverse = 1)
for fs, val in top_fs_pair_list: print_line(fs, val)
def Main():
check_args()
print_statistics()
fs_tree = make_root_tree(yield_fs_objs(get_open_filestats()))
print_top_dirs(fs_tree, "source size", lambda fs: fs.sourcesize)
print
print_top_dirs(fs_tree, "increment size", lambda fs: fs.incsize)
print
print_top_dirs(fs_tree, "number of files changed",
lambda fs: fs.changed)
if __name__ == '__main__': Main()
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