我有一个包含8G数据的HBase表.
当我在该表上使用部分键扫描来检索给定键的值时,我得到几乎恒定的时间值检索.
当我使用a时Get,所花费的时间远远大于扫描时间.但是当我查看代码时,我发现它Get本身使用的是Scan.
任何人都可以解释这个时差吗？
嗨我在完全分布式模式下使用hBase,我正在尝试使用java代码连接Hbase并创建一个表.我收到一个错误.它没有连接到hbase.我检查了它们正常运行的所有进程: - namenode,datanode,nodemanager,资源管理器,hbase master,hbase regionservers,zookeeper.
starting...
getting config...
12/07/25 18:48:31 WARN hbase.HBaseConfiguration: instantiating HBaseConfiguration() is deprecated. Please use HBaseConfiguration#create() to construct a plain Configuration
12/07/25 18:48:32 INFO zookeeper.ZooKeeper: Client environment:zookeeper.version=3.3.2-1031432, built on 11/05/2010 05:32 GMT
12/07/25 18:48:32 INFO zookeeper.ZooKeeper: Client environment:host.name=aniket
12/07/25 18:48:32 INFO zookeeper.ZooKeeper: Client environment:java.version=1.7.0_05
12/07/25 18:48:32 INFO zookeeper.ZooKeeper: Client environment:java.vendor=Oracle Corporation
12/07/25 18:48:32 INFO zookeeper.ZooKeeper: Client environment:java.home=/usr/java/jdk1.7.0_05/jre
12/07/25 18:48:32 INFO zookeeper.ZooKeeper: Client environment:java.class.path=/root/workspace/HBaseTesting/bin:/usr/lib/hadoop-0.20-mapreduce/hadoop-core.jar:/usr/lib/hadoop/hadoop-common.jar:/root/Downloads/google-collect-1.0-rc1/google-collect-1.0-rc1.jar:/root/Downloads/hbase-0.90.5/hbase-0.90.5.jar:/root/Downloads/hbase-0.90.5/lib/activation-1.1.jar:/root/Downloads/hbase-0.90.5/lib/asm-3.1.jar:/root/Downloads/hbase-0.90.5/lib/avro-1.3.3.jar:/root/Downloads/hbase-0.90.5/lib/commons-cli-1.2.jar:/root/Downloads/hbase-0.90.5/lib/commons-codec-1.4.jar:/root/Downloads/hbase-0.90.5/lib/commons-el-1.0.jar:/root/Downloads/hbase-0.90.5/lib/commons-httpclient-3.1.jar:/root/Downloads/hbase-0.90.5/lib/commons-lang-2.5.jar:/root/Downloads/hbase-0.90.5/lib/commons-logging-1.1.1.jar:/root/Downloads/hbase-0.90.5/lib/commons-net-1.4.1.jar:/root/Downloads/hbase-0.90.5/lib/core-3.1.1.jar:/root/Downloads/hbase-0.90.5/lib/guava-r06.jar:/root/Downloads/hbase-0.90.5/lib/hadoop-core-0.20-append-r1056497.jar:/root/Downloads/hbase-0.90.5/lib/jackson-core-asl-1.5.5.jar:/root/Downloads/hbase-0.90.5/lib/jackson-jaxrs-1.5.5.jar:/root/Downloads/hbase-0.90.5/lib/jackson-mapper-asl-1.4.2.jar:/root/Downloads/hbase-0.90.5/lib/jackson-xc-1.5.5.jar:/root/Downloads/hbase-0.90.5/lib/jasper-compiler-5.5.23.jar:/root/Downloads/hbase-0.90.5/lib/jasper-runtime-5.5.23.jar:/root/Downloads/hbase-0.90.5/lib/jaxb-api-2.1.jar:/root/Downloads/hbase-0.90.5/lib/jaxb-impl-2.1.12.jar:/root/Downloads/hbase-0.90.5/lib/jersey-core-1.4.jar:/root/Downloads/hbase-0.90.5/lib/jersey-json-1.4.jar:/root/Downloads/hbase-0.90.5/lib/jersey-server-1.4.jar:/root/Downloads/hbase-0.90.5/lib/jettison-1.1.jar:/root/Downloads/hbase-0.90.5/lib/jetty-6.1.26.jar:/root/Downloads/hbase-0.90.5/lib/jetty-util-6.1.26.jar:/root/Downloads/hbase-0.90.5/lib/jruby-complete-1.6.0.jar:/root/Downloads/hbase-0.90.5/lib/jsp-2.1-6.1.14.jar:/root/Downloads/hbase-0.90.5/lib/jsp-api-2.1-6.1.14.jar:/root/Downloads/hbase-0.90.5/lib/jsr311-api-1.1.1.jar:/root/Downloads/hbase-0.90.5/lib/log4j-1.2.16.jar:/root/Downloads/hbase-0.90.5/lib/protobuf-java-2.3.0.jar:/root/Downloads/hbase-0.90.5/lib/servlet-api-2.5-6.1.14.jar:/root/Downloads/hbase-0.90.5/lib/slf4j-api-1.5.8.jar:/root/Downloads/hbase-0.90.5/lib/slf4j-log4j12-1.5.8.jar:/root/Downloads/hbase-0.90.5/lib/stax-api-1.0.1.jar:/root/Downloads/hbase-0.90.5/lib/thrift-0.2.0.jar:/root/Downloads/hbase-0.90.5/lib/xmlenc-0.52.jar:/root/Downloads/hbase-0.90.5/lib/zookeeper-3.3.2.jar:/root/Downloads/hbql-0.90.0.1/hbql-0.90.0.1.jar
12/07/25 18:48:32 INFO zookeeper.ZooKeeper: Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
12/07/25 18:48:32 INFO zookeeper.ZooKeeper: Client environment:java.io.tmpdir=/tmp
12/07/25 …hbase ×2