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https://issues.apache.org/jira/browse/CRUNCH-212?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13710668#comment-13710668
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Chao Shi commented on CRUNCH-212:
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Exactly, Micah. I'm working on 1) for a while (I'm busy on other stuffs these
days, so I haven't get my tests pass. I will post it here after get test done).
The API should be able to translate PCollection<KeyValue> to a set of HFiles.
There are two problems:
1. HFileOutputFormat only accepts PTable<ImmutableByteWritable, KeyValue>
rather than PCollection<KeyValue>. For us, as ImmutableByteWritable (the row
key) can be extracted from KeyValue, so we maybe prefer the cleaner
PCollection<KeyValue> approach. Currently I copied HFileOutputFormat and
modified it a little.
2. We may need to specify a total order partitioned for bulk load. Although
this should be part of the BulkLoader, but we have to do this before generating
the HFiles.
> Need target wrapper for HFileOuptutFormat
> -----------------------------------------
>
> Key: CRUNCH-212
> URL: https://issues.apache.org/jira/browse/CRUNCH-212
> Project: Crunch
> Issue Type: Improvement
> Components: IO
> Reporter: Chao Shi
>
> I need to import data to hbase from MR. I found HFileOutputFormat is ~5x more
> efficient than HTableOutputFormat. So maybe we need a target wrapper for it.
> Future more, is it possible to call HBase to load it automatically after
> HFiles are generated?
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