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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17045) Unify the implementation of small scan and regular scan
Date Wed, 25 Jan 2017 08:13:26 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15837355#comment-15837355
] 

Hudson commented on HBASE-17045:
--------------------------------

SUCCESS: Integrated in Jenkins build HBase-Trunk_matrix #2381 (See [https://builds.apache.org/job/HBase-Trunk_matrix/2381/])
HBASE-17045 Unify the implementation of small scan and regular scan (zhangduo: rev 85d701892ed969380a8bcca9c9f4e306c74af941)
* (edit) hbase-client/src/main/java/org/apache/hadoop/hbase/client/Scan.java
* (edit) hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncRpcRetryingCallerFactory.java
* (edit) hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/RequestConverter.java
* (delete) hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAsyncTableSmallScan.java
* (edit) hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncNonMetaRegionLocator.java
* (edit) hbase-protocol/src/main/java/org/apache/hadoop/hbase/protobuf/generated/ClientProtos.java
* (delete) hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncSmallScanRpcRetryingCaller.java
* (edit) hbase-protocol/src/main/protobuf/Client.proto
* (edit) hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncClientScanner.java
* (edit) hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java
* (edit) hbase-server/src/test/java/org/apache/hadoop/hbase/client/AbstractTestAsyncTableScan.java
* (edit) hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncTableBase.java
* (edit) hbase-client/src/main/java/org/apache/hadoop/hbase/client/ScannerCallable.java
* (edit) hbase-client/src/main/java/org/apache/hadoop/hbase/protobuf/ProtobufUtil.java
* (add) hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAsyncTableScanAll.java
* (edit) hbase-client/src/main/java/org/apache/hadoop/hbase/client/RawScanResultConsumer.java
* (edit) hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncScanSingleRegionRpcRetryingCaller.java
* (edit) hbase-client/src/main/java/org/apache/hadoop/hbase/client/RawAsyncTableImpl.java
* (edit) hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestRawAsyncTableScan.java
* (edit) hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncTableImpl.java
* (edit) hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestMultiRowRangeFilter.java
* (edit) hbase-protocol-shaded/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/generated/ClientProtos.java
* (edit) hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/ProtobufUtil.java
* (edit) hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java
* (edit) hbase-protocol-shaded/src/main/protobuf/Client.proto


> Unify the implementation of small scan and regular scan
> -------------------------------------------------------
>
>                 Key: HBASE-17045
>                 URL: https://issues.apache.org/jira/browse/HBASE-17045
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Client, scan
>    Affects Versions: 2.0.0
>            Reporter: Duo Zhang
>            Assignee: Duo Zhang
>             Fix For: 2.0.0
>
>         Attachments: HBASE-17045.patch, HBASE-17045-v1.patch, HBASE-17045-v2.patch, HBASE-17045-v3.patch,
HBASE-17045-v4.patch, HBASE-17045-v5.patch, HBASE-17045-v7.patch, HBASE-17045-v8.patch, HBASE-17405-v6.patch
>
>
> See [~enis]'s comment in HBASE-16838
> https://issues.apache.org/jira/browse/HBASE-16838?focusedCommentId=15637803&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15637803
> But there is another scenario that we need small scan is that, we do not know the stop
row but we only want a small set of results. For example, in the implementation of region
locator, we will use small scan and set caching to 1 as we only need one row.
> So I think we need to add a new option(maybe called limit?) for the scan object, and
deprecate the small option. And the server side modification should also be committed to branch-1
to simplify the logic of async client in 2.0.



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