mrb - manage incremental snapshots with rsync/make.
mrb is a simple aid to creating efficient incremental snapshots of a
set, or sets, of directories whenever that may be required. It may be
used as part of a regular automated backup regime, or for manually
checkpointing changes at convenient points in time.
The following commands are recognised (where ’MODULE’ is the name of
one of your snapshot definitions):
Create a skeleton definition for a new snapshot ’MODULE’.
Create the destination dir for ’MODULE’. This directory must
exist to create a snapshot.
Create a snapshot of ’MODULE’.
sync Create snapshots of all defined modules. If run as root this
may be configured to include the modules of other users too (see
MRB_SYNC_USERS in ~/.mrb/defaults).
help Show mrb’s own help text.
The following files may be used to specify global and local
system default configuration.
The following options control behaviour for all of a user’s modules.
An optional file path where transfer details will be recorded.
If unset these details will not be logged.
A space separated list of users whose modules should be included
in a sync. This is mostly only useful for root, as mrb will
assume the identity of each user before creating snapshots of
their modules. If unset, only the invoking user’s modules will
An space separated list of the directories to search for module
definition (*.mrc) files. They will be searched in the order
given, with new modules added by default to the last one listed.
There should be few reasons to change the default value.
The default MRB_CONFDIR value will search for module definitions in:
Those created by new-MODULE will be placed in this latter
location by default.
In each case module below is the name of the particular module that the
value set should apply to. These options should be defined in a file
A space separated list of the files and (top level) directories
to include in the snapshots for this module.
The directory root where snapshots of module should be stored.
An optional list of rsync(1) include patterns.
An optional list of rsync(1) exclude patterns.
An optional list of rsync(1) filter patterns.
An optional filename for rsync(1) dir-merge filtering support.
Optional additional rsync(1) options to pass verbatim when it is
An optional shell command to invoke just prior to creating a new
snapshot. If the command does not return a successful exit
status, then the snapshot creation will be aborted before it
begins. It may be used to mount removable media or similar.
An optional shell command to execute after making the snapshot.
It will not be called if the snaphot creation failed at an
earlier stage, and its return status may halt a sync operation
if it fails with more modules still to process. It may be used,
for example, to unmount removable media again.
An optional user name to check that mrb is running as before
performing a snapshot. This can be used to ensure you have the
correct permisson to access the files being mirrored before you
get too far.
mrb was written by Ron <email@example.com>.
May 9, 2006