010012cbcb
Added new bulk assign createRoundRobinAssignProcedure to complement the existing createAssignProcedure. The former asks the balancer for target servers to set into the created AssignProcedures. The latter sets no target server into AssignProcedure. When no target server is specified, we make effort at assign-time at trying to deploy the region to its old location if there was one. The new round robin assign procedure creator does not do this. Use the new round robin method on table create or reenabling offline regions. Use the old assign in ServerCrashProcedure or in EnableTable so there is a chance we retain locality. Bulk preassigning passing all to-be-assigned to the balancer in one go is good for ensuring good distribution especially when read replicas in the mix. The old assign was single-assign scoped so region replicas could end up on the same server. M hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignProcedure.java Cleanup around forceNewPlan. Was confusing. Added a Comparator to sort AssignProcedures so meta and system tables come ahead of user-space tables. M hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignmentManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignmentManager.java Remove the forceNewPlan argument on createAssignProcedure. Didn't make sense given we were creating a new AssignProcedure; the arg had no effect. (createRoundRobinAssignProcedures) Recast to feed all regions to the balancer in bulk and to sort the return so meta and system tables take precedence. Miscellaneous fixes including keeping the Master around until all RegionServers are down, documentation on how assignment retention works, etc. |
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| bin | ||
| conf | ||
| dev-support | ||
| hbase-annotations | ||
| hbase-archetypes | ||
| hbase-assembly | ||
| hbase-backup | ||
| hbase-build-configuration | ||
| hbase-build-support | ||
| hbase-checkstyle | ||
| hbase-client | ||
| hbase-common | ||
| hbase-endpoint | ||
| hbase-examples | ||
| hbase-external-blockcache | ||
| hbase-hadoop-compat | ||
| hbase-hadoop2-compat | ||
| hbase-http | ||
| hbase-it | ||
| hbase-mapreduce | ||
| hbase-metrics | ||
| hbase-metrics-api | ||
| hbase-native-client | ||
| hbase-procedure | ||
| hbase-protocol | ||
| hbase-protocol-shaded | ||
| hbase-replication | ||
| hbase-resource-bundle | ||
| hbase-rest | ||
| hbase-rsgroup | ||
| hbase-server | ||
| hbase-shaded | ||
| hbase-shell | ||
| hbase-spark | ||
| hbase-spark-it | ||
| hbase-testing-util | ||
| hbase-thrift | ||
| hbase-zookeeper | ||
| src | ||
| .gitattributes | ||
| .gitignore | ||
| .pylintrc | ||
| CHANGES.txt | ||
| LICENSE.txt | ||
| NOTICE.txt | ||
| README.txt | ||
| pom.xml | ||
README.txt
Apache HBase [1] is an open-source, distributed, versioned, column-oriented store modeled after Google' Bigtable: A Distributed Storage System for Structured Data by Chang et al.[2] Just as Bigtable leverages the distributed data storage provided by the Google File System, HBase provides Bigtable-like capabilities on top of Apache Hadoop [3]. To get started using HBase, the full documentation for this release can be found under the doc/ directory that accompanies this README. Using a browser, open the docs/index.html to view the project home page (or browse to [1]). The hbase 'book' at http://hbase.apache.org/book.html has a 'quick start' section and is where you should being your exploration of the hbase project. The latest HBase can be downloaded from an Apache Mirror [4]. The source code can be found at [5] The HBase issue tracker is at [6] Apache HBase is made available under the Apache License, version 2.0 [7] The HBase mailing lists and archives are listed here [8]. The HBase distribution includes cryptographic software. See the export control notice here [9]. 1. http://hbase.apache.org 2. http://research.google.com/archive/bigtable.html 3. http://hadoop.apache.org 4. http://www.apache.org/dyn/closer.cgi/hbase/ 5. https://hbase.apache.org/source-repository.html 6. https://hbase.apache.org/issue-tracking.html 7. http://hbase.apache.org/license.html 8. http://hbase.apache.org/mail-lists.html 9. https://hbase.apache.org/export_control.html