Prototypes » History » Version 29
Greg Burri, 06/21/2009 10:49 PM
| 1 | 1 | Greg Burri | h1. Prototypes |
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| 3 | 6 | Greg Burri | 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. |
| 4 | 2 | Greg Burri | |
| 5 | 24 | Greg Burri | # [[SHA-1 prototype]] : 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. |
| 6 | 25 | Greg Burri | # [[UTF8 prototype]] : Reading and writing files with UTF8 characters in theirs filename. Must be tested for the three platforms : Linux, Windows and MacOSX. |
| 7 | 28 | Greg Burri | # [[Search prototype]] : Searching into a large set of files and directories with a glob string or a range of size. Measure the average time for about 50'000 files, it should be below one minute for the first search and below 3 seconds for the next searches. |
| 8 | 19 | Greg Burri | # Observing the modifications of the files structure to hash new added files and remove hash from the cache when a file is deleted. |
| 9 | 1 | Greg Burri | # Multicast UDP and periodically signal emitting. |
| 10 | 29 | Greg Burri | # Serializing and exchanging message with _Protocol Buffers_. |
| 11 | # Defining and testing the concurrent model for downloading and uploading. Reading and writing the same file from different threads. |