Mirroring

From BCMpedia. A Wiki Glossary for Business Continuity Management (BCM) and Disaster Recovery (DR).
Jump to: navigation, search
1. Mirroring is a strategy that maintains selected data such that both copies of the data (local and remote copies) are synchronized.

Notes (1): This strategy involves two active sites, each capable of taking over the other’s workload in the event of a disaster. Each site will have enough idle processing power to restore data from the other site and to accommodate the excess workload in the event of a disaster. The two sites should be physically removed from each other and should be capable of handling regional disasters, such as floods or hurricanes.

Notes (2): Mirroring requires that updates to data be received at both the primary and secondary locations before the owning application is notified that the update is complete.

Notes (3): Mirroring requires dedicated hardware at both sites, with the capability to automatically transfer the workload between sites.

Notes (4): Using the mirroring strategy, virtually no data will be lost in the event of a disaster, thus providing for continuous availability.

Notes (5): The two sites should be physically removed from each other and should be capable of handling regional disasters, such as floods or hurricanes. Mirroring is popular term for RAID-1.

Notes (6): The types of mirroring includes:

Related Terms: Data Protection/Recovery Strategy - Category, Replication, Journaling, Shadowing

(Source: Business Continuity Management Institute - BCM Institute)

A Manager's Guide to Managing and Implementing Your IT Disaster Recovery Plan (2010) BUY!




Courses: IT DR Certification