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  • Hbase Basic Prerequisites

    Table 2. Java
    HBase Version  JDK 6     JDK 7      JDK 8

    1.0

    Not     Supported

    yes

    Running with JDK 8 will work but is not well tested.

    0.98

    yes

    yes

    Running with JDK 8 works but is not well tested. Building with JDK 8 would require removal of the deprecated remove() method of thePoolMap class and is under consideration. See HBASE-7608 for more information about JDK 8 support.

    0.96

    yes

    yes

    N/A

    0.94

    yes

    yes

    N/A

    Table 3. Hadoop version support matrix
     HBase-0.92.xHBase-0.94.xHBase-0.96.xHBase-0.98.x (Support for Hadoop 1.1+ is deprecated.)HBase-1.0.x (Hadoop 1.x is NOT supported)

    Hadoop-0.20.205

    S

    X

    X

    X

    X

    Hadoop-0.22.x

    S

    X

    X

    X

    X

    Hadoop-1.0.x

    X

    X

    X

    X

    X

    Hadoop-1.1.x

    NT

    S

    S

    NT

    X

    Hadoop-0.23.x

    X

    S

    NT

    X

    X

    Hadoop-2.0.x-alpha

    X

    NT

    X

    X

    X

    Hadoop-2.1.0-beta

    X

    NT

    S

    X

    X

    Hadoop-2.2.0

    X

    NT

    S

    S

    NT

    Hadoop-2.3.x

    X

    NT

    S

    S

    NT

    Hadoop-2.4.x

    X

    NT

    S

    S

    S

    Hadoop-2.5.x

    X

    NT

    S

    S

    S

    4.1.6.

    An HDFS datanode has an upper bound on the number of files that it will serve at any one time. Before doing any loading, make sure you have configured Hadoop’s conf/hdfs-site.xml, setting thedfs.datanode.max.transfer.threads value to at least the following:

    <property>
      <name>dfs.datanode.max.transfer.threads</name>
      <value>4096</value>
    </property>

    Be sure to restart your HDFS after making the above configuration.

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  • 原文地址:https://www.cnblogs.com/tmeily/p/4285134.html
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