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Greg Burri, 09/03/2009 09:50 AM
Prototypes¶
Prototypes are locate here : source:/prototypes. The goal is to write some code to try to resolve a particular problem which we don't know exactly how to solve.
| Name | Description | Status |
|---|---|---|
| 1. SHA-1 prototype | Creating SHA-1 hash for each part of a file. 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. | OK |
| 2. UTF8 prototype | Reading and writing files with UTF8 characters in theirs filename. Must be tested for the three platforms : Linux, Windows and MacOSX. | lack of MacOSX tests |
| 3. 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. | Will not be used for the moment -> Standby |
| 4. UDP prototype | Multicast UDP and periodically signal emitting. | Qt doesn't provide UDP multicast, using of low level API. It should be tested over different subnetwork and vlan. |
| 5. Protobuf prototype | Serializing and exchanging message with Protocol Buffers. | OK |
| 6. Concurrent prototype | Defining and testing the concurrent model for downloading and uploading. Reading and writing the same file from different threads. | OK |
| 7. Watcher prototype | Observing the modifications of the files structure to hash new added files and remove hash from the cache when a file is deleted. See the class QFileSystemWatcher. | 80% |
| 8. Backtrace prototype | Be able to print the stacktrace in case of error in debug mode. | TODO |
| 9. Word index prototype | Choose and implement a good index algorithm and do some spatial and time measures. | OK |
Updated by Greg Burri about 15 years ago · 45 revisions