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be more verbose about the great deduplication algorithm

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Thomas Waldmann 2015-07-27 23:02:52 +02:00
parent 729cc4d82d
commit 300c7351e7
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README.rst
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@ -38,6 +38,23 @@ Space efficient storage
variable length chunks and only chunks that have never been seen before are variable length chunks and only chunks that have never been seen before are
compressed and added to the repository. compressed and added to the repository.
The content-defined chunking based deduplication is applied to remove
duplicate chunks within:
* the current backup data set (even inside single files / streams)
* current and previous backups of same machine
* all the chunks in the same repository, even if coming from other machines
This advanced deduplication method does NOT depend on:
* file/directory names staying the same (so you can move your stuff around
without killing the deduplication, even between machines sharing a repo)
* complete files or time stamps staying the same (if a big file changes a
little, only a few new chunks will be stored - this is great for VMs or
raw disks)
* the absolute position of a data chunk inside a file (stuff may get shifted
and will still be found by the deduplication algorithm)
Optional data encryption Optional data encryption
All data can be protected using 256-bit AES encryption and data integrity All data can be protected using 256-bit AES encryption and data integrity
and authenticity is verified using HMAC-SHA256. and authenticity is verified using HMAC-SHA256.