When comparing Déjà Dup vs BackupPC, the Slant community recommends Déjà Dup for most people. In the question“What are the best backup programs for Linux?” Déjà Dup is ranked 4th while BackupPC is ranked 7th. The most important reason people chose Déjà Dup is:
The program's interface has 4 tabs - overview, storage, folders and schedule. You select where to back up in "storage", what folders to back up and ignore in "folders" and how often to back up in "schedule." Overview displays all these settings and offers a choice of backing up and restoring.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Straightforward interface
The program's interface has 4 tabs - overview, storage, folders and schedule. You select where to back up in "storage", what folders to back up and ignore in "folders" and how often to back up in "schedule." Overview displays all these settings and offers a choice of backing up and restoring.
Pro Can back up to any server that Nautilus can connect to
You can connect to both physically connected devices as well as devices that are available over FTP, SSH, as long as Nautilus can connect to them.
Pro Available on Ubuntu by default
For people using Ubuntu, this is already installed.
Pro No need to install anything more on the backed-up PC
Pro Able to handle large amount of servers and data
The disk IO can be a bootleneck but the system itself handles even multi terabyte servers easily.
Pro Supports various platforms
Backup method is highly configurable, using local copy, ssh, rsync, SMB or custom transfer, so able to backup almost any OS supporting these.
Pro Open Source
Pro Efficient disk format
The disk format automatically deduplicates files, and optionally compress files or assist recovery with redundancy information (par2); storage disk usage is very efficient.
Pro Combining full and incremental backups into "filled" view
Backups are always viewed as a whole, regardless of the count or data content of past incrementals.
Pro Rich command line tools
Apart from the Web UI there are command line tools for doing all tasks related to the backup system.
Cons
Con Backend provider choices recently removed
As of version 42, support for backup to Amazon S3, Google Cloud Storage, Openstack Swift, Rackspace, etc has been removed entirely. Google Drive is the default and seemingly only option.
Con No way to set limitations on how much disk space the application should use
The program will use up all available disk space for backups. There's not way to set limitations.
Con No way to set a specific backup time for automatic backups
You can only set the backups to be daily, weekly or monthly without the ability to tell what time the backups should happen.
Con Version 3 on-disk format is impossible to "file-copy"
V3 format uses hard-links which is almost impossble to "file-copy" (using filesystem level tools like cp or rsync) on a large system, since the hardlink management eats up vast amounts of memory (the only way to copy a backup server is to copy using a whole-disk copying method). This has been fixed in version 4 format which uses pointer files instead of hardlinks.
Con Web UI timeouts on large amount of data to be displayed
The Web UI needs large amount of time to walk a directory with thousands of entries and it may cause the webserver or client to timeout. Large directories may require the admin to use the command line tools to list or restore files or directories.