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Hadoop QA commented on HBASE-11144: ----------------------------------- {color:green}+1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12690724/HBASE_11144_V11.patch against master branch at commit 645fbd7d87450b31b67b1e535cdb9c1cf50ffd16. ATTACHMENT ID: 12690724 {color:green}+1 @author{color}. The patch does not contain any @author tags. {color:green}+1 tests included{color}. The patch appears to include 2 new or modified tests. {color:green}+1 javac{color}. The applied patch does not increase the total number of javac compiler warnings. {color:green}+1 javac{color}. The applied patch does not increase the total number of javac compiler warnings. {color:green}+1 javadoc{color}. The javadoc tool did not generate any warning messages. {color:green}+1 checkstyle{color}. The applied patch does not increase the total number of checkstyle errors {color:green}+1 findbugs{color}. The patch does not introduce any new Findbugs (version 2.0.3) warnings. {color:green}+1 release audit{color}. The applied patch does not increase the total number of release audit warnings. {color:green}+1 lineLengths{color}. The patch does not introduce lines longer than 100 {color:green}+1 site{color}. The mvn site goal succeeds with this patch. {color:green}+1 core tests{color}. The patch passed unit tests in . Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/12357//testReport/ Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12357//artifact/patchprocess/newPatchFindbugsWarningshbase-rest.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12357//artifact/patchprocess/newPatchFindbugsWarningshbase-common.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12357//artifact/patchprocess/newPatchFindbugsWarningshbase-client.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12357//artifact/patchprocess/newPatchFindbugsWarningshbase-annotations.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12357//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12357//artifact/patchprocess/newPatchFindbugsWarningshbase-server.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12357//artifact/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12357//artifact/patchprocess/newPatchFindbugsWarningshbase-protocol.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12357//artifact/patchprocess/newPatchFindbugsWarningshbase-thrift.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12357//artifact/patchprocess/newPatchFindbugsWarningshbase-examples.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/12357//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html Checkstyle Errors: https://builds.apache.org/job/PreCommit-HBASE-Build/12357//artifact/patchprocess/checkstyle-aggregate.html Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/12357//console This message is automatically generated. > Filter to support scan multiple row key ranges > ---------------------------------------------- > > Key: HBASE-11144 > URL: https://issues.apache.org/jira/browse/HBASE-11144 > Project: HBase > Issue Type: Improvement > Components: Filters > Reporter: Jiajia Li > Assignee: Jiajia Li > Attachments: HBASE_11144_4.patch, HBASE_11144_V10.patch, > HBASE_11144_V11.patch, HBASE_11144_V5.patch, HBASE_11144_V6.patch, > HBASE_11144_V7.patch, HBASE_11144_V9.patch, MultiRowRangeFilter.patch, > MultiRowRangeFilter2.patch, MultiRowRangeFilter3.patch, hbase_11144_V8.patch > > > HBase is quite efficient when scanning only one small row key range. If user > needs to specify multiple row key ranges in one scan, the typical solutions > are: 1. through FilterList which is a list of row key Filters, 2. using the > SQL layer over HBase to join with two table, such as hive, phoenix etc. > However, both solutions are inefficient. Both of them can’t utilize the range > info to perform fast forwarding during scan which is quite time consuming. If > the number of ranges are quite big (e.g. millions), join is a proper solution > though it is slow. However, there are cases that user wants to specify a > small number of ranges to scan (e.g. <1000 ranges). Both solutions can’t > provide satisfactory performance in such case. > We provide this filter (MultiRowRangeFilter) to support such use case (scan > multiple row key ranges), which can construct the row key ranges from user > specified list and perform fast-forwarding during scan. Thus, the scan will > be quite efficient. -- This message was sent by Atlassian JIRA (v6.3.4#6332)