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From "William Slacum (JIRA)" <>
Subject [jira] [Updated] (ACCUMULO-391) Multi-table Accumulo input format
Date Sun, 08 Jul 2012 15:58:33 GMT


William Slacum updated ACCUMULO-391:

    Attachment: multi-table-if.patch

An initial crack at this.

I tried to have changes to existing code kept at a minimum, but I did have to:

- Make the configuration key strings for InputFormatBase public
  - should be fine because they're final Strings
- Swapped some RecordReader method calls
- Made the RangeInputSplit actually use the table parameter passed to its constructor

Instead of giving clients a Key/Value pair, this uses a TableKey, which is just a key paired
with a table name represented by a Text object. I didn't implement per-table iterators.
> Multi-table Accumulo input format
> ---------------------------------
>                 Key: ACCUMULO-391
>                 URL:
>             Project: Accumulo
>          Issue Type: New Feature
>    Affects Versions: 1.4.0
>            Reporter: John Vines
>            Priority: Minor
>         Attachments: multi-table-if.patch
> Just realized we had no MR input method which supports multiple Tables for an input format.
I would see it making the table the mapper's key and making the Key/Value a tuple, or alternatively
have the Table/Key be the key tuple and stick with Values being the value.

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