Hi all,
Is there a clean way to find out which worker a particular vertex is assigned
to?
From what I tried out, I found that given n workers, each node is assigned to
the worker with id (vertex_id % n ). Is that a safe way to do this?
I’ve had a look at previous discussions, but most of
Kiran,
To answer your question directly, in an AbstractComputation class (or
whatever descendant you're using), you may call
getWorkerContext().getMyWorkerIndex() (here
https://giraph.apache.org/apidocs/org/apache/giraph/worker/WorkerContext.html).
However, if each vertex has metadata associated
I wrote a diff sometime ago where you can easily do that.
You can find implementation details at -
https://issues.apache.org/jira/browse/GIRAPH-908
https://reviews.apache.org/r/22234/
Some options you can use are
-Dgiraph.mappingStoreClass=org.apache.giraph.mapping.LongByteMappingStore
I looked at the code again does not seem like workerList is sorted, etc. so
by knowing a worker number there is no consistent way to tell the actual worker
details each time. Lukas was working on such a diff sometime back. Perhaps he
can answer more.
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