Apache Hadoop software library is a framework that allows for the distributed processing of large data sets across clusters of computers using simple programming models. It is designed to scale up from single Project) Hive：Data Warehousing and SQL-Like Query (2010-09 成為 Top-Level Project) Sqoop：Data Migration Tool Between HDFS and RDBMS Hadoop Ecosystem 30 / 74 HCatalog Hadoop 裡頭的 Naming Service 讓各種不同技術，不需要知道資料真實存放的位置，也能夠很方便 SQL Query Engine in Real Time 吸收 Google F1 Fault-Tolerant Distributed RDBMS 與 Dremel Ad Hoc Query Tool 精華 SQL on Hadoop，但是跳過 MapReduce，直接透過 In-Memory Process 來處理 Compliant with ANSI-92 SQL Standard，所以透過

成本要求 Alibaba Cloud MaxCompute 解决方案 26 6.3.1.3 检查网络连通性 使用客户端工具 network-measurement-tool 可以检查 Hadoop 集群与 MaxCompute 各个 Region 的网络连通质量，以及 download/upload 的性能。  工具使用方法  Example [INFO ] 2019-05-20 17:17:21.664 [main] PerformanceTester - Create table ODPS_NETWORK_MEASUREMENT_TOOL_TEST_TBL [INFO ] 2019-05-20 17:17:24.718 [main] PerformanceTester - Start testing upload performance [INFO ] 2019-05-20 17:17:35.049 [main] PerformanceTester - Delete table ODPS_NETWORK_MEASUREMENT_TOOL_TEST_TBL ------------------------------------------------------------------------ ENDPOINT:

execute DBMS_AQADM.START_QUEUE ('HADOOP_MR_QUEUE'); -- Query being executed by an end user or BI tool -- Note the hint is not a real hint, but a comment -- to clarify why we use the cursor select max(a)

install -y epel-release （3）注意：如果 Linux 安装的是最小系统版，还需要安装如下工具；如果安装的是 Linux 桌面标准版，不需要执行如下操作 ➢ net-tool：工具包集合，包含 ifconfig 等命令 [root@hadoop100 ~]# yum install -y net-tools ➢ vim：编辑器 [root@hadoop100