What is the maximum number of columns that HBase table may have?

In HBase, you have upto 10 column families to get best performance out of HBase cluster.

What is column family store?

A column family is a group of columns in a table that are stored as a single key-value pair in the underlying key-value store. Column families reduce the number of keys stored in the key-value store, resulting in improved performance during INSERT , UPDATE , and DELETE operations.

What is the best practice on deciding the number of column families for HBase table?

13. What is the best practice on deciding the number of column families for HBase table? Ans. Since every column family in HBase is stored as a single file, it is ideal not to exceed the number of columns families per HBase table by 15.

Is HBase column-oriented?

HBase is a column-oriented non-relational database management system that runs on top of Hadoop Distributed File System (HDFS). HBase provides a fault-tolerant way of storing sparse data sets, which are common in many big data use cases.

What of the following are key characteristics of column family in Apache HBase?

Features of HBase

• HBase is linearly scalable.
• It has automatic failure support.
• It provides consistent read and writes.
• It integrates with Hadoop, both as a source and a destination.
• It has easy java API for client.
• It provides data replication across clusters.

How do I get to HBase shell?

To access the HBase shell, you have to navigate to the HBase home folder. You can start the HBase interactive shell using “hbase shell” command as shown below. If you have successfully installed HBase in your system, then it gives you the HBase shell prompt as shown below.

How do you describe a table in HBase shell?

Use describe command to describe the details and configuration of the HBase table. For example, version, compression, blocksize, replication e.t.c. The syntax to describe the table is as follows. Examples: When table created in a namespace, you need to qualify it on command.

How many types of column family are there?

Two types of column families exist: Standard column family: contains only columns. Super column family: contains a map of super columns.