FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -HBase provides a replication mechanism to copy data between HBase clusters. Replication can be used as a disaster recovery solution and as a mechanism for high availability. You can also use replication to separate web-facing operations from back-end jobs such as MapReduce.

Detailed explanation-2: -The underlying principle of HBase replication is to replay all the transactions from the master to the slave. This is done by replaying the WALEdits (Write Ahead Log entries) in the WALs (Write Ahead Log) from the master cluster, as described in the next section.

Detailed explanation-3: -HBase replication is a way to copy data between HBase deployments. It can serve as a disaster recovery solution and can contribute to provide higher availability at the HBase layer.

Detailed explanation-4: -Cluster replication uses a source-push methodology. An HBase cluster can be a source or a destination, or it can fulfill both roles at once. Replication is asynchronous. The goal of replication is eventual consistency.

Detailed explanation-5: -The default replication factor is 3, which ensures that any data written to HDFS is replicated on three different servers within the cluster.