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你可以把编码器写到core-site.xml文件,如- <property>
- <name>io.compression.codecs</name>
- <value>org.apache.hadoop.io.compress.GzipCodec,org.apache.hadoop.io.compress.DefaultCodec,com.hadoop.compression.lzo.LzoCodec,com.hadoop.compression.lzo.LzopCodec,org.apache.hadoop.io.compress.BZip2Codec</value>
- </property>
- <property>
- <name>io.compression.codec.lzo.class</name>
- <value>com.hadoop.compression.lzo.LzoCodec</value>
- </property>
复制代码 然后把它加入mapred-site.xml,如- <property>
- <name>mapreduce.map.output.compress</name>
- <value>true</value>
- </property>
- <property>
- <name>mapreduce.map.output.compress.codec</name>
- <value>com.hadoop.compression.lzo.LzoCodec</value>
- </property>
复制代码 |
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