b50714c043
Summary: We need to to reuse compression streams in HFileBlock.Writer instead of allocating them every time. The motivation is that when using Java's built-in implementation of Gzip, we allocate a new GZIPOutputStream object and an associated native data structure any time. This is one suspected cause of recent TestHFileBlock failures on Hadoop QA: https://builds.apache.org/job/HBase-TRUNK/2658/testReport/org.apache.hadoop.hbase.io.hfile/TestHFileBlock/testPreviousOffset_1_/. Test Plan: * Run unit tests * Create a GZIP-compressed CF with new code, load some data, shut down HBase, deploy old code, restart HBase, and scan the table Reviewers: tedyu, Liyin, dhruba, JIRA, lhofhansl Reviewed By: lhofhansl CC: tedyu, lhofhansl, mbautin Differential Revision: https://reviews.facebook.net/D1719 git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1243667 13f79535-47bb-0310-9956-ffa450edef68
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 docs/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]. 1. http://hbase.apache.org 2. http://labs.google.com/papers/bigtable.html 3. http://hadoop.apache.org 4. http://www.apache.org/dyn/closer.cgi/hbase/ 5. http://hbase.apache.org/docs/current/source-repository.html 6. http://hbase.apache.org/docs/current/issue-tracking.html 7. http://hbase.apache.org/docs/current/license.html 8. http://hbase.apache.org/docs/current/mail-lists.html