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gilbertchen
2016-02-23 14:27:51 -05:00
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@@ -13,12 +13,14 @@ Duplicacy supports major cloud storage providers (Amazon S3, Googld Cloud Storag
* Deletion: every backup can be deleted independently without affecting others * Deletion: every backup can be deleted independently without affecting others
* Concurrent access: multiple clients can back up to the same storage at the same time * Concurrent access: multiple clients can back up to the same storage at the same time
The key idea behind Duplicacy is a concept called **Lock-Free Deduplication**. There are three elements of lock-free deduplication: The key idea behind Duplicacy is a concept called **Lock-Free Deduplication**, which can be summaried as follows:
* Use variable-size chunking algorithm to split files into chunks * Use variable-size chunking algorithm to split files into chunks
* Store each chunk in the storage using a file name derived from its hash, and rely on the file system API to manage chunks without using a centralized indexing database * Store each chunk in the storage using a file name derived from its hash, and rely on the file system API to manage chunks without using a centralized indexing database
* Apply a *two-step fossil collection* algorithm to remove chunks that become unreferenced after a backup is deleted * Apply a *two-step fossil collection* algorithm to remove chunks that become unreferenced after a backup is deleted
The [design document](https://github.com/gilbertchen/duplicacy-beta/blob/master/DESIGN.md) explains lock-free duplication in detail.
## Getting Started ## Getting Started
During beta testing only binaries are available. Please visit the [releases page](https://github.com/gilbertchen/duplicacy-beta/releases/latest) to download and run the executable for your platform. Installation is not needed. During beta testing only binaries are available. Please visit the [releases page](https://github.com/gilbertchen/duplicacy-beta/releases/latest) to download and run the executable for your platform. Installation is not needed.