Monday, July 14, 2008
The Storage Disk Space you bought recently is soon exhausting. Are you considering buying more disk space?
Ever thought of reducing your Backup Window?
Data De-Duplication often called "intelligent compression" or "single-instance storage" is a method of reducing storage needs by eliminating redundant data, operating at the file, block, and even the bit level. Only one unique instance of the data is actually retained on storage media, such as disk or tape. Redundant data is replaced with a pointer to the unique data copy. Hence only one instance of the data is saved.
Why do you need it?
Data de-duplication helps to improve data protection, speed up service and reduce cost.
Where does de-duplication take place?
De-duplication can happen at:
1. The Host or Source: Here, the data is checked for duplicate matter at the client itself before sending the data to the storage system.
2. The Destination: Here, the complete data is sent over the network to the designated storage system. Then the De-duplication system starts working at the disk device or on the virtual tape library as a process after the data is received.
Host Based systems are significantly advantageous over the Destination based systems because they send only one instance of the data over the network, thereby ensuring that the network bandwidth is not clogged. Also, since only the unique data is received by the storage system, it makes it easier and faster to store the data and create recovery points.
What are the Key business benefits of data de-duplication?
The following are the benefits derived by an organization that implements data de-duplication:
· Increasing overall data integrity and end with reducing overall data protection costs.
· Lower storage space requirements – it reduces the amount of disk space needed by users for backup by 90 percent.
· Longer disk retention periods
· Reduced power, space and cooling requirements
· Higher restore service levels
· Media Handling errors are reduced
· Availability of more recovery points on fast recovery media
· Efficient use of disk space
· Better recovery time objectives for a longer time
· Reduces the need for tape backups
· Reduces the data to be sent over a WAN for replication, remote backups and disaster recovery, which in turn ensures that the network bandwidth is not choked.