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From " (Commented) (JIRA)" <>
Subject [jira] [Commented] (GIRAPH-100) Data input sampling and testing improvements
Date Fri, 02 Dec 2011 02:56:41 GMT

] commented on GIRAPH-100:

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(Updated 2011-12-02 02:55:14.025295)

Review request for giraph.


Moved examples/ to integration/

Added a few context.progress() to the communication cycle to avoid task timeouts.


Got rid of ZooKeeper message for node created on the input split reservation.

Adding some features for debugging:
- Taking only a % of the input splits
- Taking a maximum number of vertices in an input split

Added master status update for number of workers have responded.

Workers will output some information about how the % of input splits that have been completed.

Fixed a bug where a forced flush of cached vertices in the input split was happening per input
split rather than at the end of processing all input splits.  This requires an additional
barrier after processing all the input splits to allow for the final flush of the cached vertices.

Factored out barrierOnWorkerList to reuse the barrier code coordination by the master.

Factored out markInputSplitPathFinished to make the code a bit cleaner.

Clearing out the transientInMessages and inMessages maps to reduce processing time.

Changed the default partition count multipler to produce n^2 partitions rather than 0.5xn^2
for better balancing when the maximum limit is not exceeded.

Changed SimpleCheckpointVertex to throw an Exception instead of System.exit(-1) for a faster
failure (seconds instead of minutes).

Moved SuperstepHashPartitionerFactory to the examples directory.  If it is not there, the
test against a real Hadoop instance will fail from ClassNotFoundException.

This addresses bug GIRAPH-100.

Diffs (updated)



Passed local and Hadoop instance unittests.  Ran PageRankBenchmark on a real Hadoop cluster.



> Data input sampling and testing improvements
> --------------------------------------------
>                 Key: GIRAPH-100
>                 URL:
>             Project: Giraph
>          Issue Type: New Feature
>          Components: graph
>            Reporter: Avery Ching
>            Assignee: Avery Ching
>         Attachments: GIRAPH-100.2.patch, GIRAPH-100.patch
> It would be really nice to help debug an application by limiting the input data (% of
input splits, max vertices per input split).  Also, it would be nice for the workers to provide
a little more debugging info on how far along they are with processing the input data.

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