为hive设置输出压缩的参数
<!-- map output compress begin--><property> <name>mapred.compress.map.output</name> <value>true</value></property><property> <name>mapred.output.compress</name> <value>true</value></property><property> <name>hive.exec.compress.output</name> <value>true</value> <description> This controls whether the final outputs of a query (to a local/hdfs file or a hive table) is compressed. The compression codec and other options are determined from hadoop config variables mapred.output.compress* </description></property><property> <name>hive.exec.compress.intermediate</name> <value>true</value> <description> This controls whether intermediate files produced by hive between multiple map-reduce jobs are compressed. The compression codec and other options are determined from hadoop config variables mapred.output.compress* </description></property><property> <name>mapred.output.compression.codec</name> <value>org.apache.hadoop.io.compress.GzipCodec</value></property><property> <name>mapred.map.output.compression.codec</name> <value>org.apache.hadoop.io.compress.GzipCodec</value></property><property> <name>mapred.output.compression.type</name> <value>BLOCK</value></property><!-- map output compress end-->
