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# Copyright (C) 2009-2015 Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
import logging
import time
import obnamlib
class BackupProgress(object):
def __init__(self, ts):
self.file_count = 0
self.backed_up_count = 0
self.uploaded_bytes = 0
self.scanned_bytes = 0
self.started = None
self.errors = False
self._now = time.time
self._ts = ts
self._ts['current-file'] = ''
self._ts['scanned-bytes'] = 0
self._ts['uploaded-bytes'] = 0
if self.ttystatus_supports_multiline(): # pragma: no cover
self._ts.format(
'%ElapsedTime() Backing up: '
'found %Counter(current-file) files, '
'%ByteSize(scanned-bytes); '
'uploaded: %ByteSize(uploaded-bytes)\n'
'%String(what)'
)
else: # pragma: no cover
self._ts.format(
'%ElapsedTime() '
'%Counter(current-file) '
'files '
'%ByteSize(scanned-bytes) scanned: '
'%String(what)')
def set_time_func(self, now):
self._now = now
def ttystatus_supports_multiline(self):
return hasattr(self._ts, 'start_new_line')
def clear(self): # pragma: no cover
self._ts.clear()
def finish(self): # pragma: no cover
self._ts.finish()
def error(self, msg, exc=None):
self.errors = True
logging.error(msg, exc_info=exc)
self._ts.error('ERROR: %s' % msg)
def what(self, what_what):
if self.started is None:
self.started = self._now()
self._ts['what'] = what_what
self._ts.flush()
def update_progress(self): # pragma: no cover
self._ts['not-shown'] = 'not shown'
def update_progress_with_file(self, filename, metadata):
self._ts['what'] = filename
self._ts['current-file'] = filename
self.file_count += 1
def update_progress_with_scanned(self, amount):
self.scanned_bytes += amount
self._ts['scanned-bytes'] = self.scanned_bytes
def update_progress_with_upload(self, amount):
self.uploaded_bytes += amount
self._ts['uploaded-bytes'] = self.uploaded_bytes
def update_progress_with_removed_checkpoint(self, gen): # pragma: no cover
self._ts['checkpoint'] = gen
def compute_report(self, fs):
duration = self._now() - self.started
overhead = fs.bytes_written + fs.bytes_read - self.uploaded_bytes
speed = self.uploaded_bytes / float(duration)
return {
'duration': duration,
'file-count': self.file_count,
'backed-up-count': self.backed_up_count,
'scanned-bytes': self.scanned_bytes,
'uploaded-chunk-bytes': self.uploaded_bytes,
'uploaded-total-bytes': fs.bytes_written,
'downloaded-total-bytes': fs.bytes_read,
'overhead-total-bytes': overhead,
'effective-upload-speed': speed,
}
def report_stats(self, output, fs, quiet, report=None): # pragma: no cover
if report is None:
report = self.compute_report(fs)
duration_string = obnamlib.humanise_duration(report['duration'])
chunk_amount, chunk_unit = obnamlib.humanise_size(
report['uploaded-total-bytes'])
ul_amount, ul_unit = obnamlib.humanise_size(
report['uploaded-total-bytes'])
dl_amount, dl_unit = obnamlib.humanise_size(
report['downloaded-total-bytes'])
overhead_bytes = (
report['downloaded-total-bytes'] +
(report['uploaded-total-bytes'] - report['uploaded-total-bytes']))
overhead_bytes = max(0, overhead_bytes)
overhead_amount, overhead_unit = obnamlib.humanise_size(overhead_bytes)
if report['uploaded-total-bytes'] > 0:
overhead_percent = (
100.0 * overhead_bytes / report['uploaded-total-bytes'])
else:
overhead_percent = 0.0
speed_amount, speed_unit = obnamlib.humanise_speed(
report['uploaded-total-bytes'], report['duration'])
logging.info(
'Backup performance statistics:')
logging.info(
'* files found: %s',
report['file-count'])
logging.info(
'* files backed up: %s',
report['backed-up-count'])
logging.info(
'* uploaded chunk data: %s bytes (%s %s)',
report['uploaded-total-bytes'], chunk_amount, chunk_unit)
logging.info(
'* total uploaded data (incl. metadata): %s bytes (%s %s)',
report['uploaded-total-bytes'], ul_amount, ul_unit)
logging.info(
'* total downloaded data (incl. metadata): %s bytes (%s %s)',
report['downloaded-total-bytes'], dl_amount, dl_unit)
logging.info(
'* transfer overhead: %s bytes (%s %s)',
overhead_bytes, overhead_amount, overhead_unit)
logging.info(
'* duration: %s s (%s)',
report['duration'], duration_string)
logging.info(
'* average speed: %s %s',
speed_amount, speed_unit)
scanned_amount, scanned_unit = obnamlib.humanise_size(
report['scanned-bytes'])
if not quiet:
output.write(
'Backed up %d files (of %d found), containing %.1f %s.\n' %
(report['backed-up-count'],
report['file-count'],
scanned_amount,
scanned_unit))
output.write(
'Uploaded %.1f %s file data in %s at %.1f %s '
'average speed.\n' %
(chunk_amount,
chunk_unit,
duration_string,
speed_amount,
speed_unit))
output.write(
'Total download amount %.1f %s.\n' %
(dl_amount,
dl_unit))
output.write(
'Total upload amount %.1f %s. '
'Overhead was %.1f %s (%.1f %%).\n' %
(ul_amount,
ul_unit,
overhead_amount,
overhead_unit,
overhead_percent))
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