How do I run a Hive script?
How to run hive scripts?
- Step 1: Write a Hive script. To write the Hive Script, the file must be saved with the extension . sql extension.
- Step 2: Run the Hive Script. The following is the command to run the hive script: Command: hive –f /home/cloudera/sample.sql.
Table of Contents
How does Hive setup explain it?
The following simple steps are executed for the Hive installation:
- Step 1: Verify the JAVA installation.
- Step 2: Verify the Hadoop installation.
- Step 4: Installing Hive.
- Step 5: Hive Configuration.
- Step 6: Download and install Apache Derby.
- Step 7: Hive Metastore Configuration.
- Step 8: Verify the Hive installation.
How do I start Hive from the command line?
In Cloudera Manager, click Hosts > All Hosts. Make a note of the IP address or hostname of a node in your cluster, for example, myhost-vpc.cloudera.com. Use ssh to login to the cluster. Type hive to start Hive from the command line.
What is Hive server2?
HiveServer2 (HS2) is a server interface that allows remote clients to run queries against Hive and retrieve the results (more in-depth introduction here). The current implementation, based on Thrift RPC, is an enhanced version of HiveServer and supports multiple client concurrency and authentication.
Is Hive easy to learn?
Pig and Hive are very easy to learn and code, making it easy for SQL professionals to master their skills working on the Hadoop platform.
Metastore is the central repository for Apache Hive metadata. Stores metadata for Hive tables (such as their schema and location) and partitions in a relational database. It provides client access to this information by using the metastore service API.
Where do I run Hive commands?
You can run most Hive commands from the command line of a node in your cluster. The Hive keyword, which starts Beeline in the background, precedes the Hive command. Hive 3 and later versions only support Beeline to run Hive commands from the command line.
How does the Hive command line work?
These are the Hive components that are required when running the CLI on a Hadoop cluster. Here, you run Hive in local mode, which uses local storage, rather than HDFS, for your data. To run the Hive CLI, run the hive command and specify the CLI as the service you want to run.
How can I tell if the Hive server is running?
If you are using Ambari, you can drill into the hive. You will see the components for Hive here > Metastore, Hiveserver2, Webhcat. You can click on hiveserver2 and this will take you to the hosts page for the host running hiveserver2.
How long does it take to learn Hive?
Learn Hive in 3 Days!!!