Simple Module Koorde

File: Overlay/Koorde/Koorde.ned

C++ definition: click here

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KoordeModules

Implementation of the Koorde DHT overlay as described in "Koorde: A simple degree-optimal distributed hash table" by M. Frans Kaashoek and David R. Karger,. published in Proceedings of the 2nd International Workshop on Peer-to-Peer Systems (IPTPS '03).

Parameters:

Name Type Description
debugOutput bool

enable debug output?

measureNetwInitPhase bool

record values during init phase?

stabilizeDelay numeric

number of seconds between two stabilize algo calls

hopCountMax numeric

maximal number of hops

keyLength numeric

overlay key length

joinOnApplicationRequest bool

only join the overlay on application request

useCommonAPIforward bool

enable CommonAPI forward() calls

iterativeLookup bool

do iterative instead of recursive lookups

collectPerHopDelay bool

delay statistics for single hops

useNextHopRpc bool

use RPCs for route messages

lookupRedundantNodes 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

lookupFailedNodeRpcs bool

communicate failed nodes

stabilizeRetry numeric

retries before neighbor considered failed

joinRetry numeric

number of join retries

joinDelay numeric

time interval between two join tries

successorListSize numeric

maximal number of nodes in successor list

deBruijnListSize numeric

maximal number of nodes in de Bruijn list

shiftingBits numeric

number of bits concurrently shifted

deBruijnDelay numeric

number of seconds between two de Bruijn algo calls

fixfingersDelay numeric

relic from Chord

aggressiveJoinMode bool

use modified (faster) JOIN protocol

extendedFingerTable bool

use the extended finger table?

numFingerCandidates numeric
proximityRouting bool

use proximity routing

drawOverlayTopology bool

draw arrow to successor node?

useOtherLookup bool

deBruijnRetry : numeric, // number of de Bruijn retries resetDeBruijnNode: numeric,

useSucList bool

flag which is indicating that the optimization using the successorlist is enabled

localPort numeric

UDP port for Koorde messages

Gates:

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

direct_in input

gate for sendDirect

Source code:

simple Koorde
    parameters:
        debugOutput : bool,    // enable debug output?
        measureNetwInitPhase : bool,    // record values during init phase?
        stabilizeDelay : numeric,    // number of seconds between two stabilize algo calls
        hopCountMax : numeric,    // maximal number of hops
        keyLength : numeric,    // overlay key length	
        joinOnApplicationRequest : bool,    // only join the overlay on application request

        useCommonAPIforward : bool,    // enable CommonAPI forward() calls
        iterativeLookup : bool,    // do iterative instead of recursive lookups
        collectPerHopDelay : bool,    // delay statistics for single hops
        useNextHopRpc : bool,            // use RPCs for route messages

        lookupRedundantNodes : 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
        lookupFailedNodeRpcs : bool,    // communicate failed nodes

        stabilizeRetry : numeric,    // retries before neighbor considered failed
        joinRetry : numeric,    // number of join retries
        joinDelay : numeric,    // time interval between two join tries
        successorListSize : numeric,    // maximal number of nodes in successor list
        deBruijnListSize: numeric,    // maximal number of nodes in de Bruijn list
        shiftingBits: numeric,    // number of bits concurrently shifted
        deBruijnDelay : numeric,    // number of seconds between two de Bruijn algo calls
        fixfingersDelay : numeric,    // relic from Chord
        aggressiveJoinMode : bool,    // use modified (faster) JOIN protocol
        extendedFingerTable : bool,    // use the extended finger table?
        numFingerCandidates : numeric,
        proximityRouting : bool,    // use proximity routing
        drawOverlayTopology : bool,    // draw arrow to successor node?
        //deBruijnRetry : numeric,    // number of de Bruijn retries
        //resetDeBruijnNode: numeric,
        useOtherLookup: bool,    // flag which is indicating that the optimization other lookup is enabled
        useSucList: bool,    // flag which is indicating that the optimization using the successorlist is enabled
        localPort : numeric;    // UDP port for Koorde messages
    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
        in: direct_in;    // gate for sendDirect
endsimple