Protocol core-core Version 3 » History » Revision 18
Revision 17 (Greg Burri, 07/07/2009 11:44 PM) → Revision 18/73 (Greg Burri, 07/08/2009 09:40 AM)
h1. Protocols
This page describes the protocols used by Aybabtu for network communication between cores and between core and GUI.
h2. Core <-> Core
see source:protos/network_protocol.proto.
h3. Parameters
Most parameters will be stored as constants in their component.
|_.Name|_.Value |_.Unit|_.Explanation/Comments|
| _ChunkSize_ | 33554432 | [Byte] | (32 MB) |
| _LanSpeed_ | 52428800 | [Byte/s] | (50 MB/s) |
| _TimeRecheckChunkFactor_ | 4 | - | If the time to download a chunk exceeds _TimeRecheckChunkFactor_ * _ChunkSize_ / _LanSpeed_ the peers are rescanned to choose a better one (better download rate). For example : 4 * 32 / 50 = 2.6 second |
| _SwitchToAnotherPeerFactor_ | 1.5 | - | During the recheck of the peers to choose a better one the other download rate must be above the current * 1.5. |
| _DownloadRateValidTime_ | 1500 / _LanSpeed_ = 300 s | [s] | (5 min). The download rate of a peer is only valid during this time after its last update. After that its rate is set to the maximum. |
| _TimeBetweenChunksUpdate_ | 500 / _LanSpeed_ = 10 s | [s] | Each 10 s a daemon will scan the _NumberOfChunkToUpdate_ first chunks from the first queued downloads to know which peer has which chunk. |
| _NumberOfChunkToUpdate_ | 100 * _LanSpeed_ / _ChunkSize_ = 156 | - | The first 156 chunks (3 kB) will by send periodically to each peer. See message _HaveChunks_ in the proto file. |
h2. Core <-> GUI