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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10809) hadoop-azure: page blob support
Date Wed, 08 Oct 2014 21:32:35 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14164204#comment-14164204
] 

Hudson commented on HADOOP-10809:
---------------------------------

FAILURE: Integrated in Hadoop-trunk-Commit #6216 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/6216/])
HADOOP-10809. hadoop-azure: page blob support. Contributed by Dexter Bradshaw, Mostafa Elhemali,
Eric Hanson, and Mike Liddell. (cnauroth: rev 2217e2f8ff418b88eac6ad36cafe3a9795a11f40)
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestWasbFsck.java
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/AzureNativeFileSystemStore.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestNativeAzureFSPageBlobLive.java
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/StorageInterfaceImpl.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/metrics/TestBandwidthGaugeUpdater.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestOutOfBandAzureBlobOperationsLive.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestNativeAzureFileSystemUploadLogic.java
* hadoop-tools/hadoop-azure/dev-support/findbugs-exclude.xml
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/NativeFileSystemStore.java
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/PartialListing.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/AzureBlobStorageTestAccount.java
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/PageBlobInputStream.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestNativeAzureFileSystemContractMocked.java
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/Wasb.java
* hadoop-tools/hadoop-azure/README.txt
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestNativeAzureFileSystemContractLive.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestNativeAzureFileSystemLive.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestBlobMetadata.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestNativeAzureFileSystemConcurrency.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestAzureConcurrentOutOfBandIo.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestNativeAzureFileSystemOperationsMocked.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestWasbUriAndConfiguration.java
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/SelfRenewingLease.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/RunningLiveWasbTests.txt
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestReadAndSeekPageBlobAfterWrite.java
* hadoop-common-project/hadoop-common/CHANGES.txt
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/metrics/AzureFileSystemInstrumentation.java
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/SimpleKeyProvider.java
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/ShellDecryptionKeyProvider.java
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/PageBlobFormatHelpers.java
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/NativeAzureFileSystem.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestNativeAzureFileSystemFileNameCheck.java
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/SelfThrottlingIntercept.java
* hadoop-tools/hadoop-azure/src/test/resources/azure-test.xml
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/SyncableDataOutputStream.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/NativeAzureFileSystemBaseTest.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestAzureFileSystemErrorConditions.java
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/StorageInterface.java
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/AzureLinkedStack.java
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/PageBlobOutputStream.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/InMemoryBlockBlobStore.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestBlobDataValidation.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestOutOfBandAzureBlobOperations.java
* hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/metrics/ResponseReceivedMetricUpdater.java
* hadoop-tools/hadoop-azure/src/config/checkstyle.xml
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/metrics/AzureMetricsTestUtil.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestNativeAzureFileSystemMocked.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/MockStorageInterface.java
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/metrics/TestAzureFileSystemInstrumentation.java
* hadoop-tools/hadoop-azure/src/main/resources/META-INF/services/org.apache.hadoop.fs.FileSystem
* hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azure/TestBlobTypeSpeedDifference.java


> hadoop-azure: page blob support
> -------------------------------
>
>                 Key: HADOOP-10809
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10809
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: tools
>            Reporter: Mike Liddell
>            Assignee: Eric Hanson
>         Attachments: HADOOP-10809.02.patch, HADOOP-10809.03.patch, HADOOP-10809.04.patch,
HADOOP-10809.05.patch, HADOOP-10809.06.patch, HADOOP-10809.07.patch, HADOOP-10809.08.patch,
HADOOP-10809.09.patch, HADOOP-10809.1.patch, HADOOP-10809.10.patch, HADOOP-10809.11.patch
>
>
> Azure Blob Storage provides two flavors: block-blobs and page-blobs.  Block-blobs are
the general purpose kind that support convenient APIs and are the basis for the Azure Filesystem
for Hadoop (see HADOOP-9629).
> Page-blobs use the same namespace as block-blobs but provide a different low-level feature
set.  Most importantly, page-blobs can cope with an effectively infinite number of small accesses
whereas block-blobs can only tolerate 50K appends before relatively manual rewriting of the
data is necessary.  A simple analogy is that page-blobs are like a regular disk and the basic
API is like a low-level device driver.
> See http://msdn.microsoft.com/en-us/library/azure/ee691964.aspx for some introductory
material.
> The primary driving scenario for page-blob support is for HBase transaction log files
which require an access pattern of many small writes.  Additional scenarios can also be supported.
> Configuration:
> The Hadoop Filesystem abstraction needs a mechanism so that file-create can determine
whether to create a block- or page-blob.  To permit scenarios where application code doesn't
know about the details of azure storage we would like the configuration to be Aspect-style,
ie configured by the Administrator and transparent to the application. The current solution
is to use hadoop configuration to declare a list of page-blob folders -- Azure Filesystem
for Hadoop will create files in these folders using page-blob flavor.  The configuration key
is "fs.azure.page.blob.dir", and description can be found in AzureNativeFileSystemStore.java.
> Code changes:
> - refactor of basic Azure Filesystem code to use a general BlobWrapper and specialized
BlockBlobWrapper vs PageBlobWrapper
> - introduction of PageBlob support (read, write, etc)
> - miscellaneous changes such as umask handling, implementation of createNonRecursive(),
flush/hflush/hsync.
> - new unit tests.
> Credit for the primary patch: Dexter Bradshaw, Mostafa Elhemali, Eric Hanson, Mike Liddell.



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