![]() Deleted, new files and renamed files are detected by Rsync incrementals.īackupPC can also be configured to keep a certain number of incremental backups, and to keep a smaller number of very old incremental backups. Rsync is more clever: any files whose attributes have changed (ie: uid, gid, mtime, modes, size) since the last full are backed up. That means SMB and tar incrementals are not able to detect deleted files, renamed files or new files whose modification time is prior to the last lower-level backup. The default value is all level 1, which makes the behavior the same as earlier versions of BackupPC: each incremental will back up all the files that changed since the last full (level 0).įor SMB and tar, BackupPC uses the modification time (mtime) to determine which files have changed since the last lower-level backup. $Conf is used to specify the level of each successive incremental. A new incremental of level N will backup all files that have changed since the most recent backup of a lower level. Starting in BackupPC 3.0 multi-level incrementals are supported. ![]() Incremental BackupĪn incremental backup is a backup of files that have changed since the last successful full or incremental backup. Exponential expiry is also supported, allowing full backups with various vintages to be kept (for example, a settable number of most recent weekly fulls, plus a settable number of older fulls that are 2, 4, 8, or 16 weeks apart). BackupPC can be configured to keep a certain number of full backups. BackupPC can be configured to do a full backup at a regular interval (typically weekly). Email content, timing and policies are configurable.īackupPC is Open Source software hosted by SourceForge.Ī full backup is a complete backup of a share. Users are sent periodic email reminders if their PC has not recently been backed up. Configuration parameters can be set system-wide or also on a per-PC basis. Configuration settings allow machines connected via slower WAN connections (eg: dial up, DSL, cable) to not be backed up, even if they use the same fixed or dynamic IP address as when they are connected directly to the LAN.įlexible configuration parameters allow multiple backups to be performed in parallel, specification of which shares to backup, which directories to backup or not backup, various schedules for full and incremental backups, schedules for email reminders to users and so on. ![]() Finally, direct restore to the client machine (using smb or tar) for selected files or directories is also supported from the CGI interface.īackupPC supports mobile environments where laptops are only intermittently connected to the network and have dynamic IP addresses (DHCP). Zip or Tar archives for selected files or directories from any backup can also be downloaded from the CGI interface. ![]() Single files can be downloaded from any backup directly from the CGI interface. Alternatively, rsync can also be used on WinXX (using cygwin), and Samba could be installed on the linux or unix client to provide smb shares).įlexible restore options. On linux, unix or MacOSX clients, rsync, tar (over ssh/rsh/nfs) or ftp is used to extract backup data. On WinXX the standard smb protocol is used to extract backup data. The http/cgi user interface has internationalization (i18n) support, currently providing English, French, German, Spanish, Italian, Dutch, Polish, Portuguese-Brazilian and Chinese The CPU impact of compression is low since only new files (those not already in the pool) need to be compressed.Ī powerful http/cgi user interface allows administrators to view the current status, edit configuration, add/delete hosts, view log files, and allows users to initiate and cancel backups and browse and restore files from backups. Optional compression provides additional reductions in storage (around 40%). Identical files across multiple backups of the same or different PC are stored only once (using hard links), resulting in substantial savings in disk storage and disk writes. For other sites additional permanent archives could be created by periodically backing up the server to tape.Ī clever pooling scheme minimizes disk storage and disk I/O. For some sites this might be the complete backup solution. Given the ever decreasing cost of disks and raid systems, it is now practical and cost effective to backup a large number of machines onto a server's local disk or network storage. BackupPC is highly configurable and easy to install and maintain. OverviewīackupPC is a high-performance, enterprise-grade system for backing up Unix, Linux, WinXX, and MacOSX PCs, desktops and laptops to a server's disk. This documentation describes BackupPC version 3.3.2, released on. CGI user interface configuration settings.Starting an Archive from the command line.
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