hadoop hive training

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

Hadoop Unzip the GZ file to a text file $ Hadoop fs-text/hdfs_path/compressed_file.gz | Hadoop Fs-put-/tmp/uncompressed-file.txt Unzip the local file Gz file and upload it to HDFs $ gunzip-c filename.txt.gz | Hadoop Fs-put-/tmp/filename.txt Using awk to process CSV files, refer to using awk and friends with

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

records.NoteThere's a sentence in this journal14/12/05 08:49:46 INFO MapReduce. Job:the URL to track the job:http://hadoop01:8088/proxy/application_1406097234796_0037/This means you can use the browser to access the address to see the implementation of the task, if your task for a long time the card master is not finished is wrong, you can go to this address to see the detailed error logView ResultsMysql> SELECT * from employee;+--------+----+-------+| Rowkey | ID | Name |+--------+----+------

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

Testhivedrivertable1terry2alex3jimmy4mike5katerunning:select count (1) from TesthivedrivertableIn fact, the Java call is very simple, that is, you execute the statement in the hive shell with JDBC to do it again, so you transfer the past statement of the environment is the Hive server machine, which is written in the path from the hive server host root directory

;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