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secondo/bin/Scripts/CreatePregelDblpPGraph2Part3.psec
2026-01-23 17:03:45 +08:00

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/*
Script to create a distributed property graph for the dblp dataset.
Part 2
This part can be executed repeatedly. Run with SecondoTTBDB. Monitors must be running.
1 Set up Pregel
*/
query setupPregel(Workers);
let ResultsM = Results feed head[0] mconsumeflob;
query remotePregelCommand('let ResultsM = Results feed head[0] mconsumeflob')
query setPregelFunction(Compute, Partition);
#
/*
2 Computation
Initialize Pregel messages and ~ResultsM~ relation
*/
query InitialMessages feed initPregelMessages;
/*
Repeat several times:
*/
query startPregel(1);
query getPregelMessages() count;
query getPregelMessages() consume;
/*
When there are no more messages, look at the results:
*/
query remotePregelCommand('update Results := ResultsM mfeed consume')
query createSDArray("Results", Workers) dsummarize consume;
/*
To make the result storage empty again:
*/
query createSDArray("Results", Workers) dmap["", . feed . deletedirect count] getValue