hadoop hive tutorial

/Replace Columns Grammar: ALTER TABLE table_name [PARTITION Partition_spec] ADD| REPLACE COLUMNS (col_name data_type [COMMENT col_comment], ...) [CASCADE| RESTRICT] Example: int); Delete a table One: Delete table Grammar: DROP (database| SCHEMA) [IF EXISTS] database_name [restrict| CASCADE]; Example: drop table score; -------------------------------------------------------------------- Here, the content of this chapter is complete.

Hadoop, HBase, Hive, zookeeper default port description Component Daemon Port Configuration Description Hdfs DataNode 50010 Dfs.datanode.address Datanode service port for data transfer 50075 Dfs.datanode.http.address Port for HTTP Service 50475 Dfs.datanode.https.address Ports for HTTPS servic

get out of this safe mode 1. Modify dfs.safemode.threshold.pct to a relatively small value, the default is 0.999. 2. Hadoop dfsadmin-safemode leave command forced to leave Http://bbs.hadoopor.com/viewthread.php?tid=61extra=page=1 The user can manipulate safe mode by Dfsadmin-safemode value, as described in parameter value: Enter-Enter Safe mode Leave-Force Namenode to leave Safe mode Get-Returns information on whether Safe mode is open Wait-waits un

[:nnnnn], blue part The follower is used to connect to the leader and only listens on the leader on the port. 3888 /etc/zookeeper/conf/zoo.cfg in server.x=[hostname]:nnnnn[:nnnnn], blue part Used for the leader election. Required only if ELECTIONALG is 3 (default). All port protocols are based on TCP.For all Hadoop daemon that exist in the Web UI (HTTP service), there are URLs like:/logsList of log fil

Modified In the hadoop/etc/hadoop/core-site.xml FileAfter the attribute value is set, the original hive data cannot be found. You need to change the location attribute in the SDS table in the hive MetaStore database and change the corresponding HDFS parameter value to a new value.After modifying the

first, the basic Environment configuration I use three virtual hosts, the operating system is CENTOS7. Hadoop version 2.6, hive2.1.1 version (can be downloaded to the official website), JDK7, Scala2.11.0, zookeeper3.4.5 II, installation tutorial (1) Installation of JDK From the official website to download the JDK to the local, and then through the FTP to the Linux system, directly decompression, decompres

Why does data analysis generally use java instead of hadoop, flume, and hive APIs to process related services? Why does data analysis generally use java instead of hadoop, flume, and hive APIs to process related services? Reply content: Why does data analysis generally use java instead of

(' 123456 ') where user= ' root ';//set root user password mysql> Select Host,user,password from User where user= ' root ';mysql> flush privileges;mysql> exitIf you are not able to connect remotely, turn off the firewall/etc/rc.d/init.d/iptables stopTo manually install a later version, refer to:Http://www.cnblogs.com/zhoulf/archive/2013/01/25/zhoulf.htmlHttp://www.cnblogs.com/xiongpq/p/3384681.htmlCentOS Installation HiveCd/usr/localTAR-ZXVF hive-0.1

;Build Bucket TableCREATE TABLE par_table (viewtime INT, UserID BIGINT, Page_url string, referrer_url string, IP string COMMENT ' IP Address of the User ') COMMENT ' the Page view table ' partitioned by (date STRING, pos string) CLUSTERED by (userid ) SORTED by (Viewtime) to BUCKETS ROW FORMAT delimited ' \ t ' fields TERMINATED by ' \ n ' STORED as sequencefile; Create a table and create an indexed field DSHive> CREATE TABLE invites (foo INT, bar string) partitioned by (DS string); Copy an emp

。 Here you can see just a simple section of SQL. Almost can't see what task is running in detail.At this point can open a application. Click Tracking URL:applicationmasterGo to the MapReduce Job job_1409xxxx,job pageClick on the left side of the configurationThere are all the corresponding parameters for this job. In the search box in the upper-right corner, type string,Where key is hive.query.string the corresponding value value is the complete hive

slow.Linux Command for counting the size of all directories and total directories in a directory du -h --max-depth=1 /home/crazyant/ Count the size of all files in the crazyant directory. Here I only want to see the size of a directory. Therefore, if-max-depth = 1 is added, this command recursively lists the file sizes of all subdirectories. Use of the scp command: Copy from local to remote: scp-r? Logs_jx pss@crazyant.net/home/pss/logsHive command hive