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From "Phabricator (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-5074) support checksums in HBase block cache
Date Thu, 23 Feb 2012 22:13:56 GMT

     [ https://issues.apache.org/jira/browse/HBASE-5074?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Phabricator updated HBASE-5074:
-------------------------------

    Attachment: D1521.9.patch

dhruba updated the revision "[jira] [HBASE-5074] Support checksums in HBase block cache".
Reviewers: mbautin

  Pulled in review comments from Stack and Ted.

REVISION DETAIL
  https://reviews.facebook.net/D1521

AFFECTED FILES
  src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
  src/test/java/org/apache/hadoop/hbase/regionserver/CreateRandomStoreFile.java
  src/test/java/org/apache/hadoop/hbase/regionserver/handler/TestCloseRegionHandler.java
  src/test/java/org/apache/hadoop/hbase/regionserver/TestFSErrorsExposed.java
  src/test/java/org/apache/hadoop/hbase/regionserver/HFileReadWriteTest.java
  src/test/java/org/apache/hadoop/hbase/regionserver/TestCompoundBloomFilter.java
  src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
  src/test/java/org/apache/hadoop/hbase/regionserver/TestStoreFile.java
  src/test/java/org/apache/hadoop/hbase/io/hfile/TestChecksum.java
  src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFileBlock.java
  src/test/java/org/apache/hadoop/hbase/io/hfile/TestCacheOnWrite.java
  src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFileReaderV1.java
  src/test/java/org/apache/hadoop/hbase/io/hfile/TestFixedFileTrailer.java
  src/test/java/org/apache/hadoop/hbase/io/hfile/CacheTestUtils.java
  src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFileBlockIndex.java
  src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFileDataBlockEncoder.java
  src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFileWriterV2.java
  src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFileBlockCompatibility.java
  src/test/java/org/apache/hadoop/hbase/util/MockRegionServerServices.java
  src/main/java/org/apache/hadoop/hbase/HConstants.java
  src/main/java/org/apache/hadoop/hbase/fs
  src/main/java/org/apache/hadoop/hbase/fs/HFileSystem.java
  src/main/java/org/apache/hadoop/hbase/util/ChecksumType.java
  src/main/java/org/apache/hadoop/hbase/util/CompoundBloomFilter.java
  src/main/java/org/apache/hadoop/hbase/util/ChecksumFactory.java
  src/main/java/org/apache/hadoop/hbase/regionserver/RegionServerServices.java
  src/main/java/org/apache/hadoop/hbase/regionserver/metrics/RegionServerMetrics.java
  src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
  src/main/java/org/apache/hadoop/hbase/regionserver/Store.java
  src/main/java/org/apache/hadoop/hbase/regionserver/StoreFile.java
  src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
  src/main/java/org/apache/hadoop/hbase/mapreduce/LoadIncrementalHFiles.java
  src/main/java/org/apache/hadoop/hbase/io/hfile/ChecksumUtil.java
  src/main/java/org/apache/hadoop/hbase/io/hfile/HFileBlock.java
  src/main/java/org/apache/hadoop/hbase/io/hfile/HFileDataBlockEncoderImpl.java
  src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderV2.java
  src/main/java/org/apache/hadoop/hbase/io/hfile/HFile.java
  src/main/java/org/apache/hadoop/hbase/io/hfile/HFileWriterV2.java
  src/main/java/org/apache/hadoop/hbase/io/hfile/HFileDataBlockEncoder.java
  src/main/java/org/apache/hadoop/hbase/io/hfile/AbstractHFileReader.java
  src/main/java/org/apache/hadoop/hbase/io/hfile/NoOpDataBlockEncoder.java
  src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderV1.java
  src/main/java/org/apache/hadoop/hbase/io/hfile/FixedFileTrailer.java
  src/main/java/org/apache/hadoop/hbase/io/hfile/HFileWriterV1.java

                
> support checksums in HBase block cache
> --------------------------------------
>
>                 Key: HBASE-5074
>                 URL: https://issues.apache.org/jira/browse/HBASE-5074
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>            Reporter: dhruba borthakur
>            Assignee: dhruba borthakur
>         Attachments: D1521.1.patch, D1521.1.patch, D1521.2.patch, D1521.2.patch, D1521.3.patch,
D1521.3.patch, D1521.4.patch, D1521.4.patch, D1521.5.patch, D1521.5.patch, D1521.6.patch,
D1521.6.patch, D1521.7.patch, D1521.7.patch, D1521.8.patch, D1521.8.patch, D1521.9.patch,
D1521.9.patch
>
>
> The current implementation of HDFS stores the data in one block file and the metadata(checksum)
in another block file. This means that every read into the HBase block cache actually consumes
two disk iops, one to the datafile and one to the checksum file. This is a major problem for
scaling HBase, because HBase is usually bottlenecked on the number of random disk iops that
the storage-hardware offers.

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