OLAP 语法及 Cost-Base 的算法优化，让用户 就像使用关系型数据库一样使用 Hadoop。底层存储采用 HDFS， HAWQ 实现了计算节点和 HDFS 数据节点的解耦，采用 MR2.0 的 YARN 来进行资源调度，同时具有 Hadoop 的灵活伸缩的架构特性 和 MPP 的高效能计算能力。 当然，有得也有所失，虽然 HAWQ 的架构比 GreenplumMPP 数据 库灵活，但在获得架构优越性的同时，其性能比

了配置上传的功能。如果需要访问 Hadoop 相关的外部数据，必须上传对应 Hadoop 集群的 core- site.xml, hdfs-site.xml, mapred-site.xml, yarn-site.xml 配置⽂件，如果还需要额外访问 Hive 或者 HBase 数据，则需要上传 hive-site.xml 或者 hbase-site.xml 配置⽂件。 因为配置⽂件中⼀般以域

Issues and Limitations, you may consider reverting the s3- site.xml modifications or removing the yarn-site.xml file from your S3 server directory. 168167337- gpinitsystem : When running gpinitsystem

Issues and Limitations, you may consider reverting the s3- site.xml modifications or removing the yarn-site.xml file from your S3 server directory. 168167337- gpinitsystem : When running gpinitsystem

Issues and Limitations, you may consider reverting the s3- site.xml modifications or removing the yarn-site.xml file from your S3 server directory. 168167337- gpinitsystem : When running gpinitsystem

Issues and Limitations, you may consider reverting the s3-site.xml modifications or removing the yarn-site.xml file from your S3 server directory. 168167337- gpinitsystem When running gpinitsystem to

Issues and Limitations, you may consider reverting the s3-site.xml modifications or removing the yarn-site.xml file from your S3 server directory. 168167337- gpinitsystem When running gpinitsystem to

Issues and Limitations, you may consider reverting the s3-site.xml modifications or removing the yarn-site.xml file from your S3 server directory. 168167337- gpinitsystem When running gpinitsystem to

Issues and Limitations, you may consider reverting the s3-site.xml modifications or removing the yarn-site.xml file from your S3 server directory. 168167337- gpinitsystem When running gpinitsystem to

Issues and Limitations, you may consider reverting the s3-site.xml modifications or removing the yarn-site.xml file from your S3 server directory. 168167337- gpinitsystem When running gpinitsystem to