Prototypes¶

Prototypes are locate in the '/prototypes' directory in the repository. The goal is to write some code to try to resolve a particular problem which we don't know exactly how to solve.

1. Creating SHA-1 hash for each part of a file. See Libraries for the list of SHA-1 lib. We must find the quickest library. The reference in term of speed is sha1sum from the openssl package. The speed is approximately 150Mo/s for a cached file for an Intel 1.8 GHz Core2 CPU.
2. Observing the modifications of the files structure to hash new added files and remove hash from the cache when a file is deleted.
3. Multicast UDP.
4. Protocol Buffers with Haskell. see http://hackage.haskell.org/cgi-bin/hackage-scripts/package/protocol-buffers.
5. Reading of filename with UTF8 characters.
6. Reading and writing the same file from different threads.
7. Efficient of the file transfer over TCP/IP with Haskell. It includes reading, streaming and writing. Comparisons with SMB and NFS.