Database Reference
In-Depth Information
Configuring
Replication
and
Data
Center
Recently, the need for big data heterogeneous systems has evolved. Components in
such systems are diverse in nature and can be made up of different data sets. Consider-
ing nature, locality, and quantity of data volume, it is highly possible that such systems
may need to interconnect with data centers available on different physical locations.
A data center is a hardware system (say commodity server), which consists of mul-
tiple racks. A rack may contain one or more nodes (see
Figure 1-8
).
Figure 1-8
.
Image depicting a Cassandra data center
Reasons for maintaining multiple data centers can be high availability, stand-by-
node, and data recovery.
With high availability, any incoming request must be served with minimum latency.
Data replication is a mechanism to keep redundant copy of the same data on multiple
nodes.
