Protocol core-core Version 3 » History » Version 22
Greg Burri, 07/08/2009 11:43 PM
1 | 1 | Greg Burri | h1. Protocols |
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3 | This page describes the protocols used by Aybabtu for network communication between cores and between core and GUI. |
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5 | 7 | Greg Burri | h2. Core <-> Core |
6 | 1 | Greg Burri | |
7 | 21 | Greg Burri | h3. Notes pour plus tards |
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9 | 22 | Greg Burri | * Le message _HaveChunks_ doit être multicast et la réponse est un datagramme UDP. Il n'est pas possible de maintenir N-1 connexion TCP en permanence ou N est le nombre de peer. (à mesurer). DU coup ce message peut remplacer le _IMAlive_ |
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12 | 7 | Greg Burri | see source:protos/network_protocol.proto. |
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14 | 8 | Greg Burri | h3. Parameters |
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16 | 10 | Greg Burri | Most parameters will be stored as constants in their component. |
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18 | 9 | Greg Burri | |_.Name|_.Value |_.Unit|_.Explanation/Comments| |
19 | 19 | Greg Burri | | _IMAliveFrequency_ | 0.1 | [Hz] | The message _IMAlive_ is sent each 10s. | |
20 | 14 | Greg Burri | | _ChunkSize_ | 33554432 | [Byte] | (32 MB) | |
21 | | _LanSpeed_ | 52428800 | [Byte/s] | (50 MB/s) | |
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22 | 17 | Greg Burri | | _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 | |
23 | | _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. | |
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24 | | _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. | |
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25 | 15 | Greg Burri | | _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. | |
26 | 20 | Greg Burri | | _NumberOfChunkToUpdate_ | 100 * _LanSpeed_ / _ChunkSize_ = 156 | - | The first 156 hash chunks (3 kB) will by send periodically to each peer. See message _HaveChunks_ in the proto file. | |
27 | 19 | Greg Burri | | _FindTimeout_ | 15 | [s] | A search request is abandoned after 15 seconds from the start of the request. See message _Find_. | |
28 | | _GetHashesTimeout_ | 60 | [s] | Timeout for the message _GetHashes_. | |
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29 | | _GetChunkTimeout_ | 10 | [s] | Timeout for the message _GetChunk_. | |
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30 | | _HaveChunksTimeout_ | _TimeBetweenChunksUpdate_ = 10 | [s] | Timeout for the message _HaveChunks_. | |
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31 | | _GetEntriesTimeout_ | 10 | [s] | Timeout for the message _GetEntries_. | |
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32 | 8 | Greg Burri | |
33 | 7 | Greg Burri | h2. Core <-> GUI |