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Posted to dev@giraph.apache.org by "Jan van der Lugt (JIRA)" <ji...@apache.org> on 2012/05/22 00:40:53 UTC
[jira] [Updated] (GIRAPH-192) Move aggregators to a seperate
sub-package
[ https://issues.apache.org/jira/browse/GIRAPH-192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jan van der Lugt updated GIRAPH-192:
------------------------------------
Attachment: GIRAPH-192.patch
> Move aggregators to a seperate sub-package
> ------------------------------------------
>
> Key: GIRAPH-192
> URL: https://issues.apache.org/jira/browse/GIRAPH-192
> Project: Giraph
> Issue Type: Improvement
> Components: examples
> Reporter: Jan van der Lugt
> Priority: Minor
> Attachments: GIRAPH-192.patch
>
> Original Estimate: 3h
> Remaining Estimate: 3h
>
> Since aggregators will be re-used throughout many projects and algorithms, it makes sense to implement the most common ones in a separate sub-package. This will reduce the time required for users when they implement their projects based on Giraph, because the required aggregators are already in place. I implemented the following ones:
> for int/long/float/double: min, max, overwrite
> for long/double: product, sum
> for boolean: and, or, overwrite
> Most of them speak for themselves, except for the overwrite one. This aggregator simply overwrites the stored value when a new value is aggregated. This is useful when one node is in some way a master node (for example a source node in an routing algorithm), and this node wants to broadcast a value to all other nodes.
> Attached is a patch against trunk implementing the aggregators and patching some existing files so they use the .aggregators package instead of the .examples one.
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