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Posted to dev@hama.apache.org by "Edward J. Yoon (JIRA)" <ji...@apache.org> on 2014/01/08 05:32:50 UTC
[jira] [Commented] (HAMA-837) Add sort behaviour to runtime
partitioner
[ https://issues.apache.org/jira/browse/HAMA-837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13865054#comment-13865054 ]
Edward J. Yoon commented on HAMA-837:
-------------------------------------
Found a bug in SemiClustering. In below case, deepcopy should be used.
{code}
- Vertex<Text, DoubleWritable, SemiClusterMessage> v = this;
+ Vertex<Text, DoubleWritable, SemiClusterMessage> v = this.deepCopy();
{code}
> Add sort behaviour to runtime partitioner
> -----------------------------------------
>
> Key: HAMA-837
> URL: https://issues.apache.org/jira/browse/HAMA-837
> Project: Hama
> Issue Type: Bug
> Components: bsp core
> Reporter: Edward J. Yoon
> Assignee: Edward J. Yoon
> Fix For: 0.7.0
>
> Attachments: HAMA-837_v01.patch, HAMA-837_v02.patch
>
>
> If key is comparable and it need to be sorted by key of record,
> {code}
> if (outputPair.getKey() instanceof WritableComparable
> && conf.getBoolean(Constants.PARTITION_SORT_BY_KEY, false)) {
> {code}
> each patitions should be sorted by key. In here, we can use external merge sort.
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