Link: https://github.com/henryx/memento-java

Memento is a backup system for remote computers. It is similar of other systems (e.g. rsnapshot) but it has some differences:

• It uses an agent for checking and downloading data.
• It manages four distinct datasets (hour, day, week, month).
• It saves space with hard link creation.
• It saves data attribute (owner, group, permission, ACL) into database.

Memento is released under GPLv2 (see GPL.txt for details)

• Java 1.7;
• Firebird;

• Extract the archive into a directory.
• Create an empty database in Firebird.
• Configure the [database] and the [general] sections into configuration file.
• Create machine section into configuration file (see the example below).
• Run

Client usage is:

$ java -jar memento-client.jar -p <port>

Where <port> is port number which service listen requests from server (use -h option for help)

Server usage is:

$ java -jar memento-server.jar --cfg=<cfgfile> -H # hour backup
$ java -jar memento-server.jar --cfg=<cfgfile> -D # day backup
$ java -jar memento-server.jar --cfg=<cfgfile> -W # week backup
$ java -jar memento-server.jar --cfg=<cfgfile> -M # month backup

Where <cfgfile> is a file structured like the backup.cfg reported in the archive. For other options, use -h switch. Some notes:

• It is possible to have multiple configuration files, where each file has different parameters.
• While [general] [dataset] and [database] sections are global, it is possible to add any number of sections, one per server.

This is an example of configuration file:

[general]
repository = /full/path/to/store/backups
log_file = memento.log
log_level = INFO

[database]
host = localhost
port = 3050
user = sysdba
password = masterkey
dbname = memento.fdb

[dataset]
hour = 24
day = 6
week = 4
month = 12

[a_server]
type = file
host = localhost
port = 4444
path = /full/path/to/backup
acl = true
compress = true
ssl = true
sslkey = /path/for/java/keystore.jks
sslpass = a_password
pre_command =
post_command =

For SSL connection, it uses a java keystore. For its creation, use this command:

keytool -genkey -keyalg RSA -keystore <keystore.jks> -storepass <optional_password> -keyalg RSA

In client app, use -S options for enable it. The has this syntax:

[ssl]
key = /path/to/keystore.jks
password = optional_password #optional

In server app, use the configuration file for enable it

Because Memento use hard links to store its dataset, its use is guaranteed on linux or unix environments.