HBase统计

小鸡

HBase统计方法

使用Hive统计

  1. 建一张Hive表映射HBase表

    CREATE EXTERNAL TABLE LJKTEST(
    ID STRING ,
    AGE STRING ,
    NAME STRING ,
    COMPANY STRING ,
    SCHOOL STRING
    )STORED BY 'org.apache.hadoop.hive.hbase.HBaseStorageHandler'
    WITH SERDEPROPERTIES ("hbase.columns.mapping" = ":key,0:AGE,0:NAME,0:COMPANY,0:SCHOOL")
    TBLPROPERTIES("hbase.table.name" = "LJKTEST");
  2. 执行hive统计sql即可

    这边使用COUNT(1)和COUNT(*)都不起作用,统计出来是0.只能使用COUNT(字段)。应该跟映射机制有关系。

    SELECT COUNT(ID) FROM LJKTEST;

使用phoenix统计

SELECT COUNT(1) FROM LJKTEST;

使用HBase原生接口统计

HADOOP_CLASSPATH=`hbase classpath` hadoop jar /usr/hdp/current/hbase-client/lib/hbase-server.jar rowcounter LJKTEST

使用spark统计

spark统计hbase

pom文件引入依赖,<font color="red">必须加上exclusion,否则会报错class "javax.servlet.FilterRegistration"'s signer information does not match signer information of other classes in the same package</font>

<dependency>
            <groupId>org.apache.hbase</groupId>
            <artifactId>hbase-server</artifactId>
            <version>1.1.2.2.5.0.0-1245</version>
            <exclusions>
                <exclusion>
                    <artifactId>servlet-api</artifactId>
                    <groupId>javax.servlet</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>jetty</artifactId>
                    <groupId>org.mortbay.jetty</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>jetty-util</artifactId>
                    <groupId>org.mortbay.jetty</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>servlet-api-2.5</artifactId>
                    <groupId>org.mortbay.jetty</groupId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-sql_2.10</artifactId>
            <version>1.6.2.2.5.0.0-1245</version>
        </dependency>

写spark统计HBase代码

@Test
  def sparkCountHBase(): Unit = {

    val sc = new SparkContext("local","hbase-test")

    val conf = HBaseConfiguration.create()

    conf.set(TableInputFormat.INPUT_TABLE, "LJKTEST")

    val hbaseRDD = sc.newAPIHadoopRDD(conf,classOf[TableInputFormat],
      classOf[org.apache.hadoop.hbase.io.ImmutableBytesWritable],
      classOf[org.apache.hadoop.hbase.client.Result])

    val count = hbaseRDD.count()
    println(s"总共有 $count 条数据!")
  }

Spark统计Phoenix

pom引入依赖

<dependency>
            <groupId>org.apache.phoenix</groupId>
            <artifactId>phoenix-spark</artifactId>
            <version>4.7.0-HBase-1.1</version>
            <exclusions>
                <exclusion>
                    <artifactId>servlet-api</artifactId>
                    <groupId>javax.servlet</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>jetty</artifactId>
                    <groupId>org.mortbay.jetty</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>jetty-util</artifactId>
                    <groupId>org.mortbay.jetty</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>servlet-api-2.5</artifactId>
                    <groupId>org.mortbay.jetty</groupId>
                </exclusion>
            </exclusions>
        </dependency>

        <!--https://mvnrepository.com/artifact/org.apache.phoenix/phoenix-spark-->

        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-sql_2.10</artifactId>
            <version>1.6.2.2.5.0.0-1245</version>
        </dependency>

spark统计Phoenix代码

@Test
  def sparkCountPhoenix(): Unit = {

    val sc = new SparkContext("local","phoenix-test")
    val sqlContext = new SQLContext(sc)

    val df = sqlContext.load(
      "org.apache.phoenix.spark",
      Map("table" -> "LJKTEST", "zkUrl" -> "dn1:2181")
    )
//    df.show()
    println( s"总共有 ${df.count} 条数据!")
  }

附录

阅读 1.5k

大数据学习笔记
记录自己对大数据学习的点滴

1.01的365次方=37.8

206 声望
9 粉丝
0 条评论
你知道吗?

1.01的365次方=37.8

206 声望
9 粉丝
宣传栏