Prototypes » History » Revision 14
Revision 13 (Greg Burri, 12/12/2008 12:13 PM) → Revision 14/49 (Greg Burri, 12/12/2008 05:11 PM)
h1. 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.
# 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.
# Observing the modifications of the files structure to hash new added files and remove hash from the cache when a file is deleted.
# Multicast UDP.
# Protocol Buffers with Haskell. see http://hackage.haskell.org/cgi-bin/hackage-scripts/package/protocol-buffers.
# Reading of filename with UTF8 characters.
# Defining and testing the concurrent model.
# Reading and writing the same file from different threads.
# Efficient of the file transfer over TCP/IP with Haskell. It includes reading, streaming and writing. Comparisons with SMB and NFS.