The freezer.engine.rsyncv2.rsyncv2 Module¶

Freezer rsync incremental engine

Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

class freezer.engine.rsyncv2.rsyncv2.Rsyncv2Engine(**kwargs)¶

Bases: freezer.engine.engine.BackupEngine

backup_data(backup_path, manifest_path)¶

Execute backup using rsync algorithm.

If an existing rsync meta data for file is available - the backup will be incremental, otherwise will be executed a level 0 backup.

Parameters:	backup_path – Path to backup manifest_path – Path to backup metadata

get_fs_meta_struct(fs_meta_path)¶

get_sign_delta(fs_path, manifest_path, write_queue)¶

Compute the file or fs tree path signatures.

Return blocks of changed data.

Parameters:	fs_path – manifest_path – write_queue –
Returns:

metadata(*args)¶

name¶

restore_level(restore_path, read_pipe, backup, except_queue)¶

Restore the provided backup into restore_abs_path.

Decrypt backup content if encrypted. Freezer rsync header data structure:

[ {
    'path': '' (path to file),
    'inode': {
        'mode': st_mode,
        'dev': st_dev,
        'uname': username,
        'gname': groupname,
        'atime': st_atime,
        'mtime': st_mtime,
        'size': st_size
    } (optional if file removed),
   'lname': 'link_name' (optional if symlink),
   'prev_name': '' (optional if renamed),
   'new_level': True (optional if incremental),
   'deleted': True (optional if removed),
   'deltas': len_of_blocks, [modified blocks] (if patch)
  },
  ...
]

Parameters:	restore_path – Path where to restore file(s) read_pipe – ackup data backup – Backup info except_queue – Queue for exceptions

write_engine_meta(manifest_path, files_meta)¶