What is WebHCat server in hive?
WebHCat is the REST API for HCatalog, a table and storage management layer for Hadoop. Using WebHCat. Installation. Configuration. Reference.
What is WebHCat server cloudera?
WebHCat is a web API for HCatalog and related Hadoop components.
What is the use of HCatalog?
HCatalog is a table storage management tool for Hadoop that exposes the tabular data of Hive metastore to other Hadoop applications. It enables users with different data processing tools (Pig, MapReduce) to easily write data onto a grid.
What is the use of SerDe in Apache Hive?
Hive uses the SerDe interface for IO. The interface handles both serialization and deserialization and also interpreting the results of serialization as individual fields for processing. A SerDe allows Hive to read in data from a table, and write it back out to HDFS in any custom format.
What supports a new command shell beeline that works with HiveServer2?
substitute=true). 9. _______ supports a new command shell Beeline that works with HiveServer2. Explanation: The Beeline shell works in both embedded mode as well as remote mode.
IS THE REST API for HCatalog?
1. __________ is a REST API for HCatalog. Explanation: REST stands for “representational state transfer”, a style of API based on HTTP verbs. Explanation: Without HCatalog, Robert must alter the table to add the required partition.
Who developed Pig?
Apache Pig
| Developer(s) | Apache Software Foundation, Yahoo Research |
|---|---|
| Initial release | September 11, 2008 |
| Stable release | 0.17.0 / June 19, 2017 |
| Repository | svn.apache.org/repos/asf/pig/ |
| Operating system | Microsoft Windows, OS X, Linux |
Is Pig still used?
Yes, it is used by our data science and data engineering orgs. It is being used to build big data workflows (pipelines) for ETL and analytics. It provides easy and better alternatives to writing Java map-reduce code.
How is SerDe different from file format in hive?
Hive uses Files systems like HDFS or any other storage (FTP) to store data, data here is in the form of tables (which has rows and columns). SerDe – Serializer, Deserializer instructs hive on how to process a record (Row).