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From "Karan Mehta (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HBASE-18097) Save bandwidth on partial_flag_per_result in ScanResponse proto
Date Wed, 07 Jun 2017 18:07:18 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16036448#comment-16036448
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Karan Mehta edited comment on HBASE-18097 at 6/7/17 6:06 PM:
-------------------------------------------------------------

The problem can occur if the client wants results in a specified batch size, in which case,
the results can contain multiple partial results, which is then left to the user to handle
appropriately, based on the {{partial}} flag inside the result. This is usually the case with
AsyncHBaseClient.
Any suggestions, [~enis] or [~Apache9] ?


was (Author: karanmehta93):
The problem can occur if the client wants results in a specified batch size, in which case,
the results can contain multiple partial results, which is then left to the user to handle
appropriately, based on the {{partial}} flag inside the result. This is usually the case with
AsyncHBaseClient.

> Save bandwidth on partial_flag_per_result in ScanResponse proto
> ---------------------------------------------------------------
>
>                 Key: HBASE-18097
>                 URL: https://issues.apache.org/jira/browse/HBASE-18097
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 2.0.0, 1.4.0
>            Reporter: Karan Mehta
>            Assignee: Karan Mehta
>
> Currently the {{ScanResponse}} proto sends out 1 bit per {{Result}} that it has embeds
inside the {{CellScanner}} to indicate if it is partial or not. 
> {code}
>     // In every RPC response there should be at most a single partial result. Furthermore,
if
>     // there is a partial result, it is guaranteed to be in the last position of the
array.
> {code}
> According to client, only the last result can be partial, thus this repeated bool can
be converted to a bool, thus reducing overhead of serialization and deserialization of the
array. This will break wire compatibility therefore this is something to look for in upcoming
versions.



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