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92 lines
3.4 KiB
Markdown
92 lines
3.4 KiB
Markdown
Attic – Deduplicating backup program
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Attic is a deduplicating backup program written in Python. The main goal of Attic is to provide an efficient and secure way to backup data. The data deduplication technique used makes Attic suitable for daily backups since only the changes are stored.
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### Attic Features ###
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#### Space efficient storage ####
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Variable block size deduplication is used to reduce the number of bytes stored by detecting redundant data. Each file is split into a number of variable length chunks and only chunks that have never been seen before are compressed and added to the repository.
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#### Optional data encryption ####
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All data can be protected using 256-bit AES encryption and data integrity and authenticity is verified using HMAC-SHA256.
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#### Off-site backups ####
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Attic can store data on any remote host accessible over SSH as long as Attic is installed.
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#### Backups mountable as filesystems ####
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Backup archives are mountable as userspace filesystems for easy backup verification and restores.
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#### Install attic on ubuntu 14.10 ####
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Open the terminal and run the following command
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sudo apt-get install attic
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### Using Attic ###
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#### A step by step example ####
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Before a backup can be made a repository has to be initialized:
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$ attic init /somewhere/my-repository.attic
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Backup the ~/src and ~/Documents directories into an archive called Monday:
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$ attic create /somwhere/my-repository.attic::Monday ~/src ~/Documents
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The next day create a new archive called Tuesday:
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$ attic create --stats /somwhere/my-repository.attic::Tuesday ~/src ~/Documents
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This backup will be a lot quicker and a lot smaller since only new never before seen data is stored. The --stats option causes Attic to output statistics about the newly created archive such as the amount of unique data (not shared with other archives):
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Archive name: Tuesday
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Archive fingerprint: 387a5e3f9b0e792e91ce87134b0f4bfe17677d9248cb5337f3fbf3a8e157942a
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Start time: Tue Mar 25 12:00:10 2014
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End time: Tue Mar 25 12:00:10 2014
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Duration: 0.08 seconds
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Number of files: 358
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Original size Compressed size Deduplicated size
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This archive: 57.16 MB 46.78 MB 151.67 kB
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All archives: 114.02 MB 93.46 MB 44.81 MB
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List all archives in the repository:
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$ attic list /somewhere/my-repository.attic
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Monday Mon Mar 24 11:59:35 2014
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Tuesday Tue Mar 25 12:00:10 2014
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List the contents of the Monday archive:
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$ attic list /somewhere/my-repository.attic::Monday
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drwxr-xr-x user group 0 Jan 06 15:22 home/user/Documents
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-rw-r--r-- user group 7961 Nov 17 2012 home/user/Documents/Important.doc
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Restore the Monday archive:
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$ attic extract /somwhere/my-repository.attic::Monday
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Recover disk space by manually deleting the Monday archive:
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$ attic delete /somwhere/my-backup.attic::Monday
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Check the [Attic Documentation][1] for more details
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--------------------------------------------------------------------------------
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via: http://www.ubuntugeek.com/attic-deduplicating-backup-program.html
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作者：[ruchi][a]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
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[a]:http://www.ubuntugeek.com/author/ubuntufix
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[1]:https://attic-backup.org/index.html |