File: Overlay/Chord/Chord.ned
C++ definition: click here
The main module of the Chord implementation
Author: Ingmar Baumgart, Markus Mauch
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OverlayChord | Implementation of the Chord KBR overlay as described in "Chord: A Scalable Peer-to-Peer Lookup Protocol for Inetnet Applications" by I. Stoica et al. published in Transactions on Networking. |
Name | Type | Description |
---|---|---|
localPort | numeric | UDP port for Chord messages |
debugOutput | bool | enable debug output |
keyLength | numeric | overlay key length in bits |
measureNetwInitPhase | bool | gather statistics when bootstrapping |
drawOverlayTopology | bool | draw arrow to successor node? |
hopCountMax | numeric | maximum number of overlay hops |
lookupNumberNextHops | numeric | number of next hops in each step |
lookupParallelPaths | numeric | number of parallel paths |
lookupParallelRpcs | numeric | number of nodes to ask in parallel |
lookupSecure | bool | true, if all nodes should be identified with a ping |
lookupMerge | bool | true, if parallel Rpc results should be merged |
useBaseLookup | bool | use the base lookup class |
iterativeLookup | bool | do iterative instead of recursive lookups |
successorListSize | numeric | max number of successors in the SuccessorList |
joinRetry | numeric | after joinRetry unsuccessful join requests, we fetch a need bootstrap node from the BootstrapOracle |
stabilizeRetry | numeric | retries before a successor is considered failed |
joinDelay | numeric | delay between join retries (sec) |
stabilizeDelay | numeric | stabilize interval (sec) |
fixfingersDelay | numeric | fix_fingers interval (sec) |
aggressiveJoinMode | bool | use modified (faster) JOIN protocol |
Name | Direction | Description |
---|---|---|
from_udp [ ] | input | gate from the UDP layer |
to_udp [ ] | output | gate to the UDP layer |
from_app | input | gate from the application |
to_app | output | gate to the application |
simple Chord parameters: localPort : numeric, // UDP port for Chord messages debugOutput : bool, // enable debug output keyLength : numeric, // overlay key length in bits measureNetwInitPhase: bool, // gather statistics when bootstrapping drawOverlayTopology : bool, // draw arrow to successor node? hopCountMax : numeric, // maximum number of overlay hops lookupNumberNextHops : numeric, // number of next hops in each step lookupParallelPaths : numeric, // number of parallel paths lookupParallelRpcs : numeric, // number of nodes to ask in parallel lookupSecure : bool, // true, if all nodes should be identified with a ping lookupMerge : bool, // true, if parallel Rpc results should be merged useBaseLookup : bool, // use the base lookup class iterativeLookup : bool, // do iterative instead of recursive lookups // max number of successors in the SuccessorList successorListSize : numeric, // after joinRetry unsuccessful join requests, we fetch // a need bootstrap node from the BootstrapOracle joinRetry : numeric, // retries before a successor is considered failed stabilizeRetry : numeric, joinDelay : numeric, // delay between join retries (sec) stabilizeDelay : numeric, // stabilize interval (sec) fixfingersDelay : numeric, // fix_fingers interval (sec) aggressiveJoinMode : bool; // use modified (faster) JOIN protocol gates: in: from_udp[]; // gate from the UDP layer out: to_udp[]; // gate to the UDP layer in: from_app; // gate from the application out: to_app; // gate to the application endsimple