Data Replication

1. Replication
Replication is the process of creating an
exact copy of data. Creating one or more
replicas of the production data is one of
the ways to provide Business Continuity
(BC).
Data replication, where the same data is
stored on multiple storage devices

2. STORAGE-BASED REPLICATION
(REPLICATION STORAGE)
• Replication Storage, also known as storage-based
replication, is an approach to replicating data available
over a network to numerous distinct storage
locations/regions.
• It enhances the availability, accessibility, and retrieval
speed of data by allowing users to access data in real-
time from various storage locations when unexpected
failures occur at the source storage location.
• Storage-based data replication makes use of software
installed on the storage device to handle the
replication.

3. Advantages of Storage-Based
Replication
• Storage-based replication follows a
heterogenous storage mechanism and hence
houses support for numerous platforms. It
operates independently of any server or
storage-based device.
• It allows replicating data across multi-vendor
products.

4. Disadvantages of Storage-Based
Replication
• Setting up storage-based replication requires
you to leverage proprietary hardware and
hence, it has a high initial setup, operational,
and management cost.
• It requires setting up and implementing a
storage area network (SAN).

5. HOST-BASED DATA REPLICATION
(COMPUTE BASED)
• Host-based data replication uses the servers
to copy data from one site to another site.
Host-based replication software usually
includes options like compression, encryption
and, throttling, as well as failover.

6. Advantages of Host-Based Replication
• Flexible: It can leverage existing IP networks
Can be customized to your business’ needs:
You can choose what data to replicate
• Can create a schedule for sending data: allows
you to throttle bandwidth
• Can use any combination of storage devices
on each end

7. Disadvantages of Host-Based
Replication
• Difficult to manage with a large group of servers
if there is no centralized management console
• Consumes host resources during replication
• Both storage devices on each end need to be
active, which means you will need to purchase
dedicated hardware and OS
• Not all applications can support this type of data
replication Can be affected by viruses or
application failure

8. NETWORK-BASED DATA REPLICATION
• Network-based replication is a data replication
technique that operates at the network layer.
It involves replicating data between source
and target systems over a network
infrastructure. Unlike array-based or host-
based replication, network-based replication
is not tightly coupled to storage arrays or
hosts but focuses on replicating data at the
network level.

9. Advantages of network-based data
replication
• Effective in large, heterogeneous storage and
server environments
• Supports any host platform and works with
any array
• Works separately from the servers and the
storage devices
• Allows replication between multi-vendor
products

10. Disadvantages of network-based data
replication
• Higher initial set-up cost because it requires
proprietary hardware, as well as ongoing
operational and management costs
• Requires implementation of a storage area
network (SAN)

11. Thank you