|   | 1 | = Trac Backup =  | 
                  
                          |   | 2 | [[TracGuideToc]]  | 
                  
                          |   | 3 |   | 
                  
                          |   | 4 | Since Trac uses a database backend, some extra care is required to safely create a backup of a [wiki:TracEnvironment project environment]. Luckily, [wiki:TracAdmin trac-admin] has a command to make backups easier: `hotcopy`.  | 
                  
                          |   | 5 |   | 
                  
                          |   | 6 |   ''Note: Trac uses the `hotcopy` nomenclature to match that of [http://subversion.tigris.org/ Subversion], to make it easier to remember when managing both Trac and Subversion servers.''  | 
                  
                          |   | 7 |   | 
                  
                          |   | 8 | == Creating a Backup ==  | 
                  
                          |   | 9 |   | 
                  
                          |   | 10 | To create a backup of a live TracEnvironment, simply run:  | 
                  
                          |   | 11 | {{{  | 
                  
                          |   | 12 |   | 
                  
                          |   | 13 |   $ trac-admin /path/to/projenv hotcopy /path/to/backupdir  | 
                  
                          |   | 14 |   | 
                  
                          |   | 15 | }}}  | 
                  
                          |   | 16 |   | 
                  
                          |   | 17 | [wiki:TracAdmin trac-admin] will lock the database while copying.''  | 
                  
                          |   | 18 |   | 
                  
                          |   | 19 | The resulting backup directory is safe to handle using standard file-based backup tools like `tar` or `dump`/`restore`.  | 
                  
                          |   | 20 |   | 
                  
                          |   | 21 | Please, note, that hotcopy command does not overwrite target directory and when such exists, hotcopy ends with error: `Command failed: [Errno 17] File exists:` This is discussed in [trac:ticket:3198 #3198].  | 
                  
                          |   | 22 |   | 
                  
                          |   | 23 | === Restoring a Backup ===  | 
                  
                          |   | 24 |   | 
                  
                          |   | 25 | Backups are simply a copied snapshot of the entire [wiki:TracEnvironment project environment] directory, including the SQLite database.   | 
                  
                          |   | 26 |   | 
                  
                          |   | 27 | To restore an environment from a backup, stop the process running Trac (i.e. the Web server or [wiki:TracStandalone tracd]), restore the contents of your backup (path/to/backupdir) to your [wiki:TracEnvironment project environment] directory and restart the service.  | 
                  
                          |   | 28 |   | 
                  
                          |   | 29 |   ''Note: Automatic backup of environments that don't use SQLite as database backend is not supported at this time. As a workaround, we recommend that you stop the server, copy the environment directory, and make a backup of the database using whatever mechanism is provided by the database system.''  | 
                  
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                          |   | 31 | ----  | 
                  
                          |   | 32 | See also: TracAdmin, TracEnvironment, TracGuide, [trac:TracMigrate TracMigrate]  |