freezer.engine.rsyncv2.rsyncv2 module¶

Freezer rsync incremental engine

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¶

Return type:	str
Returns:	Engine 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)¶