转自：http://blog.chinaunix.net/xmlrpc.php?r=blog/article&uid=23916356&id=3321832 最近因为生产环境hbase中某张表的数据要导出到测试环境（数据不多，大概200W条左右），如果用程序掉接口导入的话太慢，所以考虑直接用 hbase的功能来导入导出。因为此次是实验，所以我在正式环境建了一张小表，只有两条数据，目的是将它导入到一张新表中（空表，但是表结构一样）
hbase(main):004:0> scan 'xyz' ROW COLUMN+CELL 10000 column=cf1:val, timestamp=1345598242644, value=china 20000 column=cf1:val, timestamp=1345598283332, value=zengzhunzhu n 2 row(s) in 0.0350 seconds
开始导出：
[hadoop@master ~]$ hbase/bin/hbase org.apache.hadoop.hbase.mapreduce.Driver expo rt xyz file:///home/hadoop/xyz 12/08/22 10:12:07 INFO mapreduce.Export: verisons=1, starttime=0, endtime=9223372036854775807 12/08/22 10:12:08 DEBUG mapreduce.TableMapReduceUtil: New JarFinder: org.apache.hadoop.util.JarFinder.getJar not available. Using old findContainingJar 12/08/22 10:12:08 DEBUG mapreduce.TableMapReduceUtil: New JarFinder: org.apache.hadoop.util.JarFinder.getJar not available. Using old findContainingJar 12/08/22 10:12:08 DEBUG mapreduce.TableMapReduceUtil: New JarFinder: org.apache.hadoop.util.JarFinder.getJar not available. Using old findContainingJar 12/08/22 10:12:08 DEBUG mapreduce.TableMapReduceUtil: New JarFinder: org.apache.hadoop.util.JarFinder.getJar not available. Using old findContainingJar 12/08/22 10:12:08 DEBUG mapreduce.TableMapReduceUtil: New JarFinder: org.apache.hadoop.util.JarFinder.getJar not available. Using old findContainingJar 12/08/22 10:12:08 DEBUG mapreduce.TableMapReduceUtil: New JarFinder: org.apache.hadoop.util.JarFinder.getJar not available. Using old findContainingJar 12/08/22 10:12:08 DEBUG mapreduce.TableMapReduceUtil: New JarFinder: org.apache.hadoop.util.JarFinder.getJar not available. Using old findContainingJar 12/08/22 10:12:08 DEBUG mapreduce.TableMapReduceUtil: New JarFinder: org.apache.hadoop.util.JarFinder.getJar not available. Using old findContainingJar SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/home/hadoop/hbase/lib/slf4j-log4j12-1.5.8.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/home/hadoop/hadoop/lib/slf4j-log4j12-1.4.3.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See for an explanation. 12/08/22 10:12:09 INFO zookeeper.ZooKeeper: Client environment:zookeeper.version=3.4.3-1240972, built on 02/06/2012 10:48 GMT 12/08/22 10:12:09 INFO zookeeper.ZooKeeper: Client environment:host.name=master 12/08/22 10:12:09 INFO zookeeper.ZooKeeper: Client environment:java.version=1.6.0_14 12/08/22 10:12:09 INFO zookeeper.ZooKeeper: Client environment:java.vendor=Sun Microsystems Inc. 12/08/22 10:12:09 INFO zookeeper.ZooKeeper: Client environment:java.home=/usr/java/jdk1.6.0_14/jre 12/08/22 10:12:09 INFO zookeeper.ZooKeeper: Client environment:java.class.path=/home/hadoop/hbase/bin/../conf:/usr/java/jdk1.6.0_14/lib/tools.jar:/home/hadoop/hbase:/home/hadoop/hbase/hbase-0.92.1.jar:/home/hadoop/hbase/hbase-0.92.1-tests.jar:/home/hadoop/hbase/lib/activation-1.1.jar:/home/hadoop/hbase/lib/asm-3.1.jar:/home/hadoop/hbase/lib/avro-1.5.3.jar:/home/hadoop/hbase/lib/avro-ipc-1.5.3.jar:/home/hadoop/hbase/lib/commons-beanutils-1.7.0.jar:/home/hadoop/hbase/lib/commons-beanutils-core-1.8.0.jar:/home/hadoop/hbase/lib/commons-cli-1.2.jar:/home/hadoop/hbase/lib/commons-codec-1.4.jar:/home/hadoop/hbase/lib/commons-collections-3.2.1.jar:/home/hadoop/hbase/lib/commons-configuration-1.6.jar:/home/hadoop/hbase/lib/commons-digester-1.8.jar:/home/hadoop/hbase/lib/commons-el-1.0.jar:/home/hadoop/hbase/lib/commons-httpclient-3.1.jar:/home/hadoop/hbase/lib/commons-lang-2.5.jar:/home/hadoop/hbase/lib/commons-logging-1.1.1.jar:/home/hadoop/hbase/lib/commons-math-2.1.jar:/home/hadoop/hbase/lib/commons-net-1.4.1.jar:/home/hadoop/hbase/lib/core-3.1.1.jar:/home/hadoop/hbase/lib/guava-r09.jar:/home/hadoop/hbase/lib/hadoop-core-1.0.0.jar:/home/hadoop/hbase/lib/high-scale-lib-1.1.1.jar:/home/hadoop/hbase/lib/httpclient-4.0.1.jar:/home/hadoop/hbase/lib/httpcore-4.0.1.jar:/home/hadoop/hbase/lib/jackson-core-asl-1.5.5.jar:/home/hadoop/hbase/lib/jackson-jaxrs-1.5.5.jar:/home/hadoop/hbase/lib/jackson-mapper-asl-1.5.5.jar:/home/hadoop/hbase/lib/jackson-xc-1.5.5.jar:/home/hadoop/hbase/lib/jamon-runtime-2.3.1.jar:/home/hadoop/hbase/lib/jasper-compiler-5.5.23.jar:/home/hadoop/hbase/lib/jasper-runtime-5.5.23.jar:/home/hadoop/hbase/lib/jaxb-api-2.1.jar:/home/hadoop/hbase/lib/jaxb-impl-2.1.12.jar:/home/hadoop/hbase/lib/jersey-core-1.4.jar:/home/hadoop/hbase/lib/jersey-json-1.4.jar:/home/hadoop/hbase/lib/jersey-server-1.4.jar:/home/hadoop/hbase/lib/jettison-1.1.jar:/home/hadoop/hbase/lib/jetty-6.1.26.jar:/home/hadoop/hbase/lib/jetty-util-6.1.26.jar:/home/hadoop/hbase/lib/jruby-complete-1.6.5.jar:/home/hadoop/hbase/lib/jsp-2.1-6.1.14.jar:/home/hadoop/hbase/lib/jsp-api-2.1-6.1.14.jar:/home/hadoop/hbase/lib/libthrift-0.7.0.jar:/home/hadoop/hbase/lib/log4j-1.2.16.jar:/home/hadoop/hbase/lib/netty-3.2.4.Final.jar:/home/hadoop/hbase/lib/protobuf-java-2.4.0a.jar:/home/hadoop/hbase/lib/servlet-api-2.5-6.1.14.jar:/home/hadoop/hbase/lib/servlet-api-2.5.jar:/home/hadoop/hbase/lib/slf4j-api-1.5.8.jar:/home/hadoop/hbase/lib/slf4j-log4j12-1.5.8.jar:/home/hadoop/hbase/lib/snappy-java-1.0.3.2.jar:/home/hadoop/hbase/lib/stax-api-1.0.1.jar:/home/hadoop/hbase/lib/velocity-1.7.jar:/home/hadoop/hbase/lib/xmlenc-0.52.jar:/home/hadoop/hbase/lib/zookeeper-3.4.3.jar:/home/hadoop/hadoop/libexec/../conf:/usr/java/jdk1.6.0_14/lib/tools.jar:/home/hadoop/hadoop/libexec/..:/home/hadoop/hadoop/libexec/../hadoop-core-1.0.3.jar:/home/hadoop/hadoop/libexec/../lib/asm-3.2.jar:/home/hadoop/hadoop/libexec/../lib/aspectjrt-1.6.5.jar:/home/hadoop/hadoop/libexec/../lib/aspectjtools-1.6.5.jar:/home/hadoop/hadoop/libexec/../lib/commons-beanutils-1.7.0.jar:/home/hadoop/hadoop/libexec/../lib/commons-beanutils-core-1.8.0.jar:/home/hadoop/hadoop/libexec/../lib/commons-cli-1.2.jar:/home/hadoop/hadoop/libexec/../lib/commons-codec-1.4.jar:/home/hadoop/hadoop/libexec/../lib/commons-collections-3.2.1.jar:/home/hadoop/hadoop/libexec/../lib/commons-configuration-1.6.jar:/home/hadoop/hadoop/libexec/../lib/commons-daemon-1.0.1.jar:/home/hadoop/hadoop/libexec/../lib/commons-digester-1.8.jar:/home/hadoop/hadoop/libexec/../lib/commons-el-1.0.jar:/home/hadoop/hadoop/libexec/../lib/commons-httpclient-3.0.1.jar:/home/hadoop/hadoop/libexec/../lib/commons-io-2.1.jar:/home/hadoop/hadoop/libexec/../lib/commons-lang-2.4.jar:/home/hadoop/hadoop/libexec/../lib/commons-logging-1.1.1.jar:/home/hadoop/hadoop/libexec/../lib/commons-logging-api-1.0.4.jar:/home/hadoop/hadoop/libexec/../lib/commons-math-2.1.jar:/home/hadoop/hadoop/libexec/../lib/commons-net-1.4.1.jar:/home/hadoop/hadoop/libexec/../lib/core-3.1.1.jar:/home/hadoop/hadoop/libexec/../lib/hadoop-capacity-scheduler-1.0.3.jar:/home/hadoop/hadoop/libexec/../lib/hadoop-fairscheduler-1.0.3.jar:/home/hadoop/hadoop/libexec/../lib/hadoop-thriftfs-1.0.3.jar:/home/hadoop/hadoop/libexec/../lib/hbase-0.92.1.jar:/home/hadoop/hadoop/libexec/../lib/hsqldb-1.8.0.10.jar:/home/hadoop/hadoop/libexec/../lib/jackson-core-asl-1.8.8.jar:/home/hadoop/hadoop/libexec/../lib/jackson-mapper-asl-1.8.8.jar:/home/hadoop/hadoop/libexec/../lib/jasper-compiler-5.5.12.jar:/home/hadoop/hadoop/libexec/../lib/jasper-runtime-5.5.12.jar:/home/hadoop/hadoop/libexec/../lib/jdeb-0.8.jar:/home/hadoop/hadoop/libexec/../lib/jersey-core-1.8.jar:/home/hadoop/hadoop/libexec/../lib/jersey-json-1.8.jar:/home/hadoop/hadoop/libexec/../lib/jersey-server-1.8.jar:/home/hadoop/hadoop/libexec/../lib/jets3t-0.6.1.jar:/home/hadoop/hadoop/libexec/../lib/jetty-6.1.26.jar:/home/hadoop/hadoop/libexec/../lib/jetty-util-6.1.26.jar:/home/hadoop/hadoop/libexec/../lib/jsch-0.1.42.jar:/home/hadoop/hadoop/libexec/../lib/junit-4.5.jar:/home/hadoop/hadoop/libexec/../lib/kfs-0.2.2.jar:/home/hadoop/hadoop/libexec/../lib/log4j-1.2.15.jar:/home/hadoop/hadoop/libexec/../lib/mockito-all-1.8.5.jar:/home/hadoop/hadoop/libexec/../lib/oro-2.0.8.jar:/home/hadoop/hadoop/libexec/../lib/servlet-api-2.5-20081211.jar:/home/hadoop/hadoop/libexec/../lib/slf4j-api-1.4.3.jar:/home/hadoop/hadoop/libexec/../lib/slf4j-log4j12-1.4.3.jar:/home/hadoop/hadoop/libexec/../lib/xmlenc-0.52.jar:/home/hadoop/hadoop/libexec/../lib/jsp-2.1/jsp-2.1.jar:/home/hadoop/hadoop/libexec/../lib/jsp-2.1/jsp-api-2.1.jar 12/08/22 10:12:09 INFO zookeeper.ZooKeeper: Client environment:java.library.path=/home/hadoop/hadoop/libexec/../lib/native/Linux-amd64-64:/home/hadoop/hbase/lib/native/Linux-amd64-64 12/08/22 10:12:09 INFO zookeeper.ZooKeeper: Client environment:java.io.tmpdir=/tmp 12/08/22 10:12:09 INFO zookeeper.ZooKeeper: Client environment:java.compiler= 12/08/22 10:12:09 INFO zookeeper.ZooKeeper: Client environment:os.name=Linux 12/08/22 10:12:09 INFO zookeeper.ZooKeeper: Client environment:os.arch=amd64 12/08/22 10:12:09 INFO zookeeper.ZooKeeper: Client environment:os.version=2.6.9-89.ELsmp 12/08/22 10:12:09 INFO zookeeper.ZooKeeper: Client environment:user.name=hadoop 12/08/22 10:12:09 INFO zookeeper.ZooKeeper: Client environment:user.home=/home/hadoop 12/08/22 10:12:09 INFO zookeeper.ZooKeeper: Client environment:user.dir=/home/hadoop 12/08/22 10:12:09 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=slave2:2222,slave1:2222,slave3:2222 sessionTimeout=180000 watcher=hconnection 12/08/22 10:12:09 INFO zookeeper.ClientCnxn: Opening socket connection to server /192.168.15.132:2222 12/08/22 10:12:09 INFO zookeeper.RecoverableZooKeeper: The identifier of this process is 12/08/22 10:12:09 WARN client.ZooKeeperSaslClient: SecurityException: java.lang.SecurityException: 无法定位登录配置 occurred when trying to find JAAS configuration. 12/08/22 10:12:09 INFO client.ZooKeeperSaslClient: Client will not SASL-authenticate because the default JAAS configuration section 'Client' could not be found. If you are not using SASL, you may ignore this. On the other hand, if you expected SASL to work, please fix your JAAS configuration. 12/08/22 10:12:09 INFO zookeeper.ClientCnxn: Socket connection established to slave3/192.168.15.132:2222, initiating session 12/08/22 10:12:09 WARN zookeeper.ClientCnxnSocket: Connected to an old server; r-o mode will be unavailable 12/08/22 10:12:09 INFO zookeeper.ClientCnxn: Session establishment complete on server slave3/192.168.15.132:2222, sessionid = 0x33943bafeb90005, negotiated timeout = 40000 12/08/22 10:12:09 DEBUG client.HConnectionManager$HConnectionImplementation: Lookedup root region location, ; serverName=slave2,60020,1345461138645 12/08/22 10:12:09 DEBUG client.HConnectionManager$HConnectionImplementation: Cached location for .META.,,1.1028785192 is slave3:60020 12/08/22 10:12:09 DEBUG client.MetaScanner: Scanning .META. starting at row=xyz,,00000000000000 for max=10 rows using 12/08/22 10:12:09 DEBUG client.HConnectionManager$HConnectionImplementation: Cached location for xyz,,1340764906812.6aa4cb2fb4c9eb34f360953acdb1e21c. is slave2:60020 12/08/22 10:12:09 DEBUG client.MetaScanner: Scanning .META. starting at row=xyz,,00000000000000 for max=2147483647 rows using 12/08/22 10:12:09 DEBUG mapreduce.TableInputFormatBase: getSplits: split -> 0 -> slave2:, 12/08/22 10:12:10 INFO mapred.JobClient: Running job: job_201208201908_0002 12/08/22 10:12:11 INFO mapred.JobClient: map 0% reduce 0% 12/08/22 10:12:30 INFO mapred.JobClient: map 100% reduce 0% 12/08/22 10:12:35 INFO mapred.JobClient: Job complete: job_201208201908_0002 12/08/22 10:12:35 INFO mapred.JobClient: Counters: 18 12/08/22 10:12:35 INFO mapred.JobClient: Job Counters 12/08/22 10:12:35 INFO mapred.JobClient: SLOTS_MILLIS_MAPS=16203 12/08/22 10:12:35 INFO mapred.JobClient: Total time spent by all reduces waiting after reserving slots (ms)=0 12/08/22 10:12:35 INFO mapred.JobClient: Total time spent by all maps waiting after reserving slots (ms)=0 12/08/22 10:12:35 INFO mapred.JobClient: Launched map tasks=1 12/08/22 10:12:35 INFO mapred.JobClient: Data-local map tasks=1 12/08/22 10:12:35 INFO mapred.JobClient: SLOTS_MILLIS_REDUCES=0 12/08/22 10:12:35 INFO mapred.JobClient: File Output Format Counters 12/08/22 10:12:35 INFO mapred.JobClient: Bytes Written=255 12/08/22 10:12:35 INFO mapred.JobClient: FileSystemCounters 12/08/22 10:12:35 INFO mapred.JobClient: HDFS_BYTES_READ=58 12/08/22 10:12:35 INFO mapred.JobClient: FILE_BYTES_WRITTEN=31370 12/08/22 10:12:35 INFO mapred.JobClient: File Input Format Counters 12/08/22 10:12:35 INFO mapred.JobClient: Bytes Read=0 12/08/22 10:12:35 INFO mapred.JobClient: Map-Reduce Framework 12/08/22 10:12:35 INFO mapred.JobClient: Map input records=2 12/08/22 10:12:35 INFO mapred.JobClient: Physical memory (bytes) snapshot=77606912 12/08/22 10:12:35 INFO mapred.JobClient: Spilled Records=0 12/08/22 10:12:35 INFO mapred.JobClient: CPU time spent (ms)=1830 12/08/22 10:12:35 INFO mapred.JobClient: Total committed heap usage (bytes)=31850496 12/08/22 10:12:35 INFO mapred.JobClient: Virtual memory (bytes) snapshot=488656896 12/08/22 10:12:35 INFO mapred.JobClient: Map output records=212/08/22 10:12:35 INFO mapred.JobClient: SPLIT_RAW_BYTES=58
上述红色字体输出已提示导出了两条数据了，因为我有3个datanode，加上数据比较少，所以肯定只会在一台datanode上有导出文件。 如果数据很多，可能每个datanode节点都会有导出文件，至于在哪台datanode上你就需要找一下/home/hadoop目录下有没有xyz目 录了。
我这找到后文件如下：
[hadoop@slave2 ~]$ cd xyz/ [hadoop@slave2 xyz]$ ls part-m-00000 _SUCCESS
开始新建一张新表，表结构和xyz表一样
hbase(main):001:0> create 'zzz','cf1' 0 row(s) in 2.0490 seconds
然后开始导入，这里我就利用导出文件在哪我就在哪导入了。当然你也可以拿这个part-m-00000文件到其余的datanode上导入， 顺便友情提醒一下，如果导出的数据很多，你导入的时候千万别把所有的part-m-0000*文件都放到一个目录下开始导入，肯定会失败的！你只能把part-m-0000*文件一个个开始导入。
[hadoop@slave2 ~]$ hbase/bin/hbase org.apache.hadoop.hbase.mapreduce.Driver impo rt zzz file:///home/hadoop/xyz/ 12/08/22 10:30:42 DEBUG mapreduce.TableMapReduceUtil: New JarFinder: org.apache.hadoop.util.JarFinder.getJar not available. Using old findContainingJar 12/08/22 10:30:42 DEBUG mapreduce.TableMapReduceUtil: New JarFinder: org.apache.hadoop.util.JarFinder.getJar not available. Using old findContainingJar 12/08/22 10:30:42 DEBUG mapreduce.TableMapReduceUtil: New JarFinder: org.apache.hadoop.util.JarFinder.getJar not available. Using old findContainingJar 12/08/22 10:30:42 DEBUG mapreduce.TableMapReduceUtil: New JarFinder: org.apache.hadoop.util.JarFinder.getJar not available. Using old findContainingJar 12/08/22 10:30:42 DEBUG mapreduce.TableMapReduceUtil: New JarFinder: org.apache.hadoop.util.JarFinder.getJar not available. Using old findContainingJar 12/08/22 10:30:42 DEBUG mapreduce.TableMapReduceUtil: New JarFinder: org.apache.hadoop.util.JarFinder.getJar not available. Using old findContainingJar 12/08/22 10:30:42 DEBUG mapreduce.TableMapReduceUtil: New JarFinder: org.apache.hadoop.util.JarFinder.getJar not available. Using old findContainingJar 12/08/22 10:30:42 DEBUG mapreduce.TableMapReduceUtil: New JarFinder: org.apache.hadoop.util.JarFinder.getJar not available. Using old findContainingJar SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/home/hadoop/hbase/lib/slf4j-log4j12-1.5.8.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/home/hadoop/hadoop/lib/slf4j-log4j12-1.4.3.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See for an explanation. 12/08/22 10:30:44 INFO zookeeper.ZooKeeper: Client environment:zookeeper.version=3.4.3-1240972, built on 02/06/2012 10:48 GMT 12/08/22 10:30:44 INFO zookeeper.ZooKeeper: Client environment:host.name=slave2 12/08/22 10:30:44 INFO zookeeper.ZooKeeper: Client environment:java.version=1.6.0_14 12/08/22 10:30:44 INFO zookeeper.ZooKeeper: Client environment:java.vendor=Sun Microsystems Inc. 12/08/22 10:30:44 INFO zookeeper.ZooKeeper: Client environment:java.home=/usr/java/jdk1.6.0_14/jre 12/08/22 10:30:44 INFO zookeeper.ZooKeeper: Client environment:java.class.path=/home/hadoop/hbase/bin/../conf:/usr/java/jdk1.6.0_14/lib/tools.jar:/home/hadoop/hbase:/home/hadoop/hbase/hbase-0.92.1.jar:/home/hadoop/hbase/hbase-0.92.1-tests.jar:/home/hadoop/hbase/lib/activation-1.1.jar:/home/hadoop/hbase/lib/asm-3.1.jar:/home/hadoop/hbase/lib/avro-1.5.3.jar:/home/hadoop/hbase/lib/avro-ipc-1.5.3.jar:/home/hadoop/hbase/lib/commons-beanutils-1.7.0.jar:/home/hadoop/hbase/lib/commons-beanutils-core-1.8.0.jar:/home/hadoop/hbase/lib/commons-cli-1.2.jar:/home/hadoop/hbase/lib/commons-codec-1.4.jar:/home/hadoop/hbase/lib/commons-collections-3.2.1.jar:/home/hadoop/hbase/lib/commons-configuration-1.6.jar:/home/hadoop/hbase/lib/commons-digester-1.8.jar:/home/hadoop/hbase/lib/commons-el-1.0.jar:/home/hadoop/hbase/lib/commons-httpclient-3.1.jar:/home/hadoop/hbase/lib/commons-lang-2.5.jar:/home/hadoop/hbase/lib/commons-logging-1.1.1.jar:/home/hadoop/hbase/lib/commons-math-2.1.jar:/home/hadoop/hbase/lib/commons-net-1.4.1.jar:/home/hadoop/hbase/lib/core-3.1.1.jar:/home/hadoop/hbase/lib/guava-r09.jar:/home/hadoop/hbase/lib/hadoop-core-1.0.0.jar:/home/hadoop/hbase/lib/high-scale-lib-1.1.1.jar:/home/hadoop/hbase/lib/httpclient-4.0.1.jar:/home/hadoop/hbase/lib/httpcore-4.0.1.jar:/home/hadoop/hbase/lib/jackson-core-asl-1.5.5.jar:/home/hadoop/hbase/lib/jackson-jaxrs-1.5.5.jar:/home/hadoop/hbase/lib/jackson-mapper-asl-1.5.5.jar:/home/hadoop/hbase/lib/jackson-xc-1.5.5.jar:/home/hadoop/hbase/lib/jamon-runtime-2.3.1.jar:/home/hadoop/hbase/lib/jasper-compiler-5.5.23.jar:/home/hadoop/hbase/lib/jasper-runtime-5.5.23.jar:/home/hadoop/hbase/lib/jaxb-api-2.1.jar:/home/hadoop/hbase/lib/jaxb-impl-2.1.12.jar:/home/hadoop/hbase/lib/jersey-core-1.4.jar:/home/hadoop/hbase/lib/jersey-json-1.4.jar:/home/hadoop/hbase/lib/jersey-server-1.4.jar:/home/hadoop/hbase/lib/jettison-1.1.jar:/home/hadoop/hbase/lib/jetty-6.1.26.jar:/home/hadoop/hbase/lib/jetty-util-6.1.26.jar:/home/hadoop/hbase/lib/jruby-complete-1.6.5.jar:/home/hadoop/hbase/lib/jsp-2.1-6.1.14.jar:/home/hadoop/hbase/lib/jsp-api-2.1-6.1.14.jar:/home/hadoop/hbase/lib/libthrift-0.7.0.jar:/home/hadoop/hbase/lib/log4j-1.2.16.jar:/home/hadoop/hbase/lib/netty-3.2.4.Final.jar:/home/hadoop/hbase/lib/protobuf-java-2.4.0a.jar:/home/hadoop/hbase/lib/servlet-api-2.5-6.1.14.jar:/home/hadoop/hbase/lib/servlet-api-2.5.jar:/home/hadoop/hbase/lib/slf4j-api-1.5.8.jar:/home/hadoop/hbase/lib/slf4j-log4j12-1.5.8.jar:/home/hadoop/hbase/lib/snappy-java-1.0.3.2.jar:/home/hadoop/hbase/lib/stax-api-1.0.1.jar:/home/hadoop/hbase/lib/velocity-1.7.jar:/home/hadoop/hbase/lib/xmlenc-0.52.jar:/home/hadoop/hbase/lib/zookeeper-3.4.3.jar:/home/hadoop/hadoop/libexec/../conf:/usr/java/jdk1.6.0_14/lib/tools.jar:/home/hadoop/hadoop/libexec/..:/home/hadoop/hadoop/libexec/../hadoop-core-1.0.3.jar:/home/hadoop/hadoop/libexec/../lib/asm-3.2.jar:/home/hadoop/hadoop/libexec/../lib/aspectjrt-1.6.5.jar:/home/hadoop/hadoop/libexec/../lib/aspectjtools-1.6.5.jar:/home/hadoop/hadoop/libexec/../lib/commons-beanutils-1.7.0.jar:/home/hadoop/hadoop/libexec/../lib/commons-beanutils-core-1.8.0.jar:/home/hadoop/hadoop/libexec/../lib/commons-cli-1.2.jar:/home/hadoop/hadoop/libexec/../lib/commons-codec-1.4.jar:/home/hadoop/hadoop/libexec/../lib/commons-collections-3.2.1.jar:/home/hadoop/hadoop/libexec/../lib/commons-configuration-1.6.jar:/home/hadoop/hadoop/libexec/../lib/commons-daemon-1.0.1.jar:/home/hadoop/hadoop/libexec/../lib/commons-digester-1.8.jar:/home/hadoop/hadoop/libexec/../lib/commons-el-1.0.jar:/home/hadoop/hadoop/libexec/../lib/commons-httpclient-3.0.1.jar:/home/hadoop/hadoop/libexec/../lib/commons-io-2.1.jar:/home/hadoop/hadoop/libexec/../lib/commons-lang-2.4.jar:/home/hadoop/hadoop/libexec/../lib/commons-logging-1.1.1.jar:/home/hadoop/hadoop/libexec/../lib/commons-logging-api-1.0.4.jar:/home/hadoop/hadoop/libexec/../lib/commons-math-2.1.jar:/home/hadoop/hadoop/libexec/../lib/commons-net-1.4.1.jar:/home/hadoop/hadoop/libexec/../lib/core-3.1.1.jar:/home/hadoop/hadoop/libexec/../lib/hadoop-capacity-scheduler-1.0.3.jar:/home/hadoop/hadoop/libexec/../lib/hadoop-fairscheduler-1.0.3.jar:/home/hadoop/hadoop/libexec/../lib/hadoop-thriftfs-1.0.3.jar:/home/hadoop/hadoop/libexec/../lib/hbase-0.92.1.jar:/home/hadoop/hadoop/libexec/../lib/hsqldb-1.8.0.10.jar:/home/hadoop/hadoop/libexec/../lib/jackson-core-asl-1.8.8.jar:/home/hadoop/hadoop/libexec/../lib/jackson-mapper-asl-1.8.8.jar:/home/hadoop/hadoop/libexec/../lib/jasper-compiler-5.5.12.jar:/home/hadoop/hadoop/libexec/../lib/jasper-runtime-5.5.12.jar:/home/hadoop/hadoop/libexec/../lib/jdeb-0.8.jar:/home/hadoop/hadoop/libexec/../lib/jersey-core-1.8.jar:/home/hadoop/hadoop/libexec/../lib/jersey-json-1.8.jar:/home/hadoop/hadoop/libexec/../lib/jersey-server-1.8.jar:/home/hadoop/hadoop/libexec/../lib/jets3t-0.6.1.jar:/home/hadoop/hadoop/libexec/../lib/jetty-6.1.26.jar:/home/hadoop/hadoop/libexec/../lib/jetty-util-6.1.26.jar:/home/hadoop/hadoop/libexec/../lib/jsch-0.1.42.jar:/home/hadoop/hadoop/libexec/../lib/junit-4.5.jar:/home/hadoop/hadoop/libexec/../lib/kfs-0.2.2.jar:/home/hadoop/hadoop/libexec/../lib/log4j-1.2.15.jar:/home/hadoop/hadoop/libexec/../lib/mockito-all-1.8.5.jar:/home/hadoop/hadoop/libexec/../lib/oro-2.0.8.jar:/home/hadoop/hadoop/libexec/../lib/servlet-api-2.5-20081211.jar:/home/hadoop/hadoop/libexec/../lib/slf4j-api-1.4.3.jar:/home/hadoop/hadoop/libexec/../lib/slf4j-log4j12-1.4.3.jar:/home/hadoop/hadoop/libexec/../lib/xmlenc-0.52.jar:/home/hadoop/hadoop/libexec/../lib/jsp-2.1/jsp-2.1.jar:/home/hadoop/hadoop/libexec/../lib/jsp-2.1/jsp-api-2.1.jar 12/08/22 10:30:44 INFO zookeeper.ZooKeeper: Client environment:java.library.path=/home/hadoop/hadoop/libexec/../lib/native/Linux-amd64-64:/home/hadoop/hbase/lib/native/Linux-amd64-64 12/08/22 10:30:44 INFO zookeeper.ZooKeeper: Client environment:java.io.tmpdir=/tmp 12/08/22 10:30:44 INFO zookeeper.ZooKeeper: Client environment:java.compiler= 12/08/22 10:30:44 INFO zookeeper.ZooKeeper: Client environment:os.name=Linux 12/08/22 10:30:44 INFO zookeeper.ZooKeeper: Client environment:os.arch=amd64 12/08/22 10:30:44 INFO zookeeper.ZooKeeper: Client environment:os.version=2.6.9-89.ELsmp 12/08/22 10:30:44 INFO zookeeper.ZooKeeper: Client environment:user.name=hadoop 12/08/22 10:30:44 INFO zookeeper.ZooKeeper: Client environment:user.home=/home/hadoop 12/08/22 10:30:44 INFO zookeeper.ZooKeeper: Client environment:user.dir=/home/hadoop 12/08/22 10:30:44 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=slave2:2222,slave1:2222,slave3:2222 sessionTimeout=180000 watcher=hconnection 12/08/22 10:30:44 INFO zookeeper.ClientCnxn: Opening socket connection to server /192.168.15.72:2222 12/08/22 10:30:44 INFO zookeeper.RecoverableZooKeeper: The identifier of this process is 12/08/22 10:30:44 WARN client.ZooKeeperSaslClient: SecurityException: java.lang.SecurityException: 无法定位登录配置 occurred when trying to find JAAS configuration. 12/08/22 10:30:44 INFO client.ZooKeeperSaslClient: Client will not SASL-authenticate because the default JAAS configuration section 'Client' could not be found. If you are not using SASL, you may ignore this. On the other hand, if you expected SASL to work, please fix your JAAS configuration. 12/08/22 10:30:44 INFO zookeeper.ClientCnxn: Socket connection established to slave1/192.168.15.72:2222, initiating session 12/08/22 10:30:44 WARN zookeeper.ClientCnxnSocket: Connected to an old server; r-o mode will be unavailable 12/08/22 10:30:44 INFO zookeeper.ClientCnxn: Session establishment complete on server slave1/192.168.15.72:2222, sessionid = 0x13943ba912f0007, negotiated timeout = 40000 12/08/22 10:30:44 DEBUG client.HConnectionManager$HConnectionImplementation: Lookedup root region location, ; serverName=slave2,60020,1345461138645 12/08/22 10:30:44 DEBUG client.HConnectionManager$HConnectionImplementation: Cached location for .META.,,1.1028785192 is slave3:60020 12/08/22 10:30:44 DEBUG client.MetaScanner: Scanning .META. starting at row=zzz,,00000000000000 for max=10 rows using 12/08/22 10:30:44 DEBUG client.HConnectionManager$HConnectionImplementation: Cached location for zzz,,1345602149536.dbeb5fc388bcc537d40b5602b60798ff. is slave3:60020 12/08/22 10:30:44 INFO mapreduce.TableOutputFormat: Created table instance for zzz 12/08/22 10:30:44 INFO input.FileInputFormat: Total input paths to process : 1 12/08/22 10:30:45 INFO mapred.JobClient: Running job: job_201208201908_0004 12/08/22 10:30:46 INFO mapred.JobClient: map 0% reduce 0% 12/08/22 10:31:23 INFO mapred.JobClient: Task Id : attempt_201208201908_0004_m_000000_0, Status : FAILED java.io.FileNotFoundException: File file:/home/hadoop/xyz/part-m-00000 does not exist. at org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:397) at org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:251) at org.apache.hadoop.fs.FileSystem.getLength(FileSystem.java:796) at org.apache.hadoop.io.SequenceFile$Reader.(SequenceFile.java:1475) at org.apache.hadoop.io.SequenceFile$Reader.(SequenceFile.java:1470) at org.apache.hadoop.mapreduce.lib.input.SequenceFileRecordReader.initialize(SequenceFileRecordReader.java:50) at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.initialize(MapTask.java:522) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:763) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370) at org.apache.hadoop.mapred.Child$4.run(Child.java:255) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:396) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121) at org.apache.hadoop.mapred.Child.main(Child.java:249)
12/08/22 10:31:35 INFO mapred.JobClient: map 100% reduce 0% 12/08/22 10:31:40 INFO mapred.JobClient: Job complete: job_201208201908_0004 12/08/22 10:31:40 INFO mapred.JobClient: Counters: 19 12/08/22 10:31:40 INFO mapred.JobClient: Job Counters 12/08/22 10:31:40 INFO mapred.JobClient: SLOTS_MILLIS_MAPS=22927 12/08/22 10:31:40 INFO mapred.JobClient: Total time spent by all reduces waiting after reserving slots (ms)=0 12/08/22 10:31:40 INFO mapred.JobClient: Total time spent by all maps waiting after reserving slots (ms)=0 12/08/22 10:31:40 INFO mapred.JobClient: Rack-local map tasks=2 12/08/22 10:31:40 INFO mapred.JobClient: Launched map tasks=2 12/08/22 10:31:40 INFO mapred.JobClient: SLOTS_MILLIS_REDUCES=0 12/08/22 10:31:40 INFO mapred.JobClient: File Output Format Counters 12/08/22 10:31:40 INFO mapred.JobClient: Bytes Written=0 12/08/22 10:31:40 INFO mapred.JobClient: FileSystemCounters 12/08/22 10:31:40 INFO mapred.JobClient: FILE_BYTES_READ=255 12/08/22 10:31:40 INFO mapred.JobClient: HDFS_BYTES_READ=99 12/08/22 10:31:40 INFO mapred.JobClient: FILE_BYTES_WRITTEN=31054 12/08/22 10:31:40 INFO mapred.JobClient: File Input Format Counters 12/08/22 10:31:40 INFO mapred.JobClient: Bytes Read=255 12/08/22 10:31:40 INFO mapred.JobClient: Map-Reduce Framework 12/08/22 10:31:40 INFO mapred.JobClient: Map input records=2 12/08/22 10:31:40 INFO mapred.JobClient: Physical memory (bytes) snapshot=72753152 12/08/22 10:31:40 INFO mapred.JobClient: Spilled Records=0 12/08/22 10:31:40 INFO mapred.JobClient: CPU time spent (ms)=260 12/08/22 10:31:40 INFO mapred.JobClient: Total committed heap usage (bytes)=18350080 12/08/22 10:31:40 INFO mapred.JobClient: Virtual memory (bytes) snapshot=491810816 12/08/22 10:31:40 INFO mapred.JobClient: Map output records=212/08/22 10:31:40 INFO mapred.JobClient: SPLIT_RAW_BYTES=99 上述输出中可以看到导入了2条记录，但是仍然会报错，报文件不存在，这就不知道是什么原因了。但是数据是导入进去了。
查看zzz表中的数据
hbase(main):003:0> scan 'zzz'
ROW COLUMN+CELL 10000 column=cf1:val, timestamp=1345598242644, value=china 20000 column=cf1:val, timestamp=1345598283332, value=zengzhunzhu n 2 row(s) in 0.0410 seconds 这样基本就完成了hbase表中的数据我们可以转化为mapreduce任务进程开始导出导入。当然也可以这么备份的。