Database replication involves creating and maintaining multiple copies of the same database for recovery and backup purposes. It requires transferring files from one computer or server to another so that all users share the same data. This results in a distributed database that gives users access to necessary information without interfering with others’ work. Normalization, which eliminates ambiguous data and inconsistent files among users, serves as the primary motivation for database replication. A distributed database management system (DDBMS) guarantees that anything that is added, deleted, or adapted on one server is reflected automatically in all other locations, creating an overall consistent database.

  Snapshot storage backup recovery works almost exactly how  it sounds: by taking a photo of the computer hard drive at a  particular moment in time. The replication occurs by copying a  disk block when it is written or by using a split-mirror set of  disks. When it is time to restore from snapshot backup, the  result is almost instantaneous. Snapshot backup can deliver full, partial, file and even some differential database backups.

In an earlier post, we discussed the pros and cons of using RAID (Redundant Array of Independent Disk) as a data recovery solution. RAID uses a disk drive component that distributes and replicates data across several levels of drivers. In a world that is becoming increasingly digital, RAID employs a physical disk drive, which is why it is important to note where physical data storage originated—tape backup. 

NSK Inc. newbie, Jose Calixto has only been with us for six months, but he is already interacting with clients on a daily basis. You may have even spoken with him if you have recently called the NSK Help Desk. His job consists of fielding calls from clients regarding server maintenance, MS Office and other IT problems and other computer issues that Jose can fix right from his desk.

What is RAID?

RAID (Redundant Array of Independent Disks) was first introduced in 1987 by David A. Patterson, Garth A. Gibson and Randy Katz at the University of California. More importantly, RAID is a well known and widely used form of data protection and disaster recovery.