|Developer(s)||Kern Sibbald, and team|
|Stable release||7.0.4 / June 9, 2014|
|License||Affero General Public License v3.0|
Bacula is an open source, enterprise level computer backup system for heterogeneous networks. It is designed to automate backup tasks that had often required intervention from a systems administrator or computer operator.
Bacula supports Linux, UNIX, Windows, and Mac OS X backup clients, and a range of professional backup devices including tape libraries. Administrators and operators can configure the system via a command line console, GUI or web interface; its back-end is a catalog of information stored by MySQL, PostgreSQL, or SQLite.
Bacula is a set of computer programs for managing backup, recovery, and verification of computer data across a network—providing a backup solution for mixed operating system environments.
Bacula is available under a "dual license" (see: Multi-licensing) AGPLv3 or Proprietary license. Several entities offer commercial support for the AGPL "Bacula community version" while Bacula Systems  sells various levels of annual support contracts for "Bacula Enterprise Edition", which contains various non-GPL components developed in-house.
In common with other dual license software, components developed for the Bacula Enterprise Edition are released into Bacula Community edition after some period of exclusivity to the proprietary version.
Since April 2002, Bacula has over 1.3 million downloads, which makes it the most downloaded open source backup program.
Bacula® is a registered trademark of Kern Sibbald.
Bacula's features include:
- TCP/IP - client–server communication uses standard ports and services instead of RPC for NFS, CIFS, etc.; this eases firewall administration and network security
- CRAM-MD5 - configurable client–server authentication
- GZIP/LZO - client-side compression to reduce network bandwidth consumption; this runs separate from hardware compression done by the backup device
- TLS - network communication encryption
- MD5/SHA - verify file integrity
- CRC - verify data block integrity
- PKI - backup data encryption
- NDMP - enterprise version plugin
- POSIX ACL - needed to restore Windows NT ACE's and Samba servers
- Unicode/UTF-8 - cross-platform filenames
- VSS - calls Microsoft's snapshot service
- LVM - pre-script setup for Linux/UNIX snapshot
- LFS - backup files larger than 2GiB
- raw - backup devices without a filesystem
- pooling - allocates backup volumes according to job needs and retention configuration
- spooling - writes backup data to spool until target backup medium is allocated so jobs can continue uninterrupted
- media-spanning - such as spanning tapes
- multi-streaming - write multiple, simultaneous data streams to the same medium
- ANSI & EBCDIC - IBM compatibility
- Barcodes - reading tape barcodes in libraries
- autoloaders - virtually every tape autoloader available (called autochangers in Bacula)
- most tape drives, including DDS, DLT, SDLT, LTO-1-6
The client software, executed by a "file daemon" running on a Bacula client, supports multiple operating systems 
Bacula stores backup data in an open and documented yet unique volume format; there are Bacula standalone tools to read/write the backup data (bls, bcopy, bscan, bextract), these tools are not compatible with other Unix backup utilities such as tar or dump.
By default, Bacula's differential and incremental backups are based on system time stamps. Consequently, if you move files into an existing directory or move a whole directory into the backup FileSet after a full backup, those files may not be backed up by an incremental save because they may have old dates. You must explicitly update the date/time stamp on all moved files. Bacula versions starting with 3.0 or later support Accurate backup, which is an option that addresses this issue.
|January 2000||Project started|
|April 14, 2002||First release to SourceForge.net (version 1.16)|
|June 29, 2006||Release 1.38.11 (Final version 1 release)|
|January 2007||Release 2.0.0|
|September 2007||Release 2.2.3|
|June 2008||Release 2.4.0|
|April 2009||Release 3.0.0|
|January 2010||Release 5.0.0|
|September 2010||Release 5.0.3|
|January 2012||Release 5.2.4|
|February 2012||Release 5.2.6|
|June 2012||Release 5.2.9|
|February 2013||Release 5.2.13|
|June 2014||Release 7.0.4|
In 2010, a fork of Bacula was started by contributors that were dissatisfied with the current conduct (by which principal developers allegedly silently ignored contributions), and the change to a proprietary license for the newly created Enterprise version of Bacula. Eventually, this fork was made public under the name Bareos in early 2013. Bacula Systems accuses Bareos of plagiarism and copyright violations and opened a lawsuit against Bareos and a former Bacula community member in early December 2013, alleging violation of IP (theft of proprietary software) and unfair competition. The Bareos project in turn considers those accusations as ungrounded.
- Preston, W. Curtis (2007). Backup & Recovery. O'Reilly Media. ISBN 0-596-10246-1. Retrieved 10 May 2010. Chapter 7 covers Bacula
- Enterprise Networking article
- Server Watch article
- O'Reilly SysAdmin interview article
- Deduplication article
- Storz, Philipp (2013). Bacula. Open Source Press. ISBN 978-3-95539-002-0.
- "Bacula Copyright, Trademark, and Licenses". Bacula.org. Retrieved 2012-06-09.
- "http://www.baculasystems.com". Bacula Systems S.A.
- Bacula Enterprise Plugins
- "Supported Operating Systems". Bacula.org. Retrieved 2012-06-09.
- "New Features in 3.0.0". Bacula.org. Retrieved 2012-06-09.
- "Why have you started a fork from bacula.org?".
- "Better Backups". ADMIN Magazine 17/2013. Retrieved 2013-11-26.
- "Bacula Systems SA files Lawsuit Against Bareos GmbH & Co. KG".
- "Lawsuit between Bacula Systems SA and Bareos GmbH & Co. KG".