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From Pradeep Gollakota <>
Subject PageRankBenchmark scaling
Date Thu, 10 Jan 2013 20:23:34 GMT
Hi All,

I'm trying to run some benchmarks using the PageRankBenchmark tool on my
cluster. However, I'm seeing some scaling issues.

My cluster has 4 nodes, configured to run 24 map tasks. I'm running the
benchmark with 23 workers. I've been able to get it scale up to 256 million
edges (16m vertices with 16 edges per vertex). However, when I try to scale
higher than that, I've been getting GC Overhead limit exceeded errors. I
tried to modify the PageRankComputation class to try to use object reuse,
but to no avail.

Does anyone have any thoughts on how I can scale this higher on my cluster?
I'm trying to get to about 50 million vertices with 150 edges per vertex
(7.5 billion edges).


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