Business Continuance Volume
From Wikipedia, the free encyclopedia
In disk arrays, a Business Continuance Volume, or BCV, is EMC Corporation's term for an independently addressable copy of data volume, that uses advanced mirroring technique for business continuity purposes.[1]
BCVs can be detached from the active data storage at a point in time and mounted on non-critical servers to facilitate offline backup or parallel processing. Once offline processes are completed, these BCVs can be either:
- discarded
- re-attached (re-synchronized) to the production data again
- used as a source to recover the production data
There are two types of BCVs:
- A clone BCV is a traditional method, and uses one-to-one separate physical storage (splitable disk mirror)
- least impact on production performance
- high cost of the additional storage (100%)
- persistent usage
- A snapshot BCV, that uses copy on write algorithm on the production volume
- uses only a small additional storage, that only holds the changes made to the production volume
- lower cost of the additional storage
- reads and writes impact performance of production storage
- once snapshot storage fills up, the snapshot becomes invalid and unusable
- short-term usage
- uses only a small additional storage, that only holds the changes made to the production volume
[edit] References
 |
This article needs additional citations for verification. Please help improve this article by adding reliable references. Unsourced material may be challenged and removed. (November 2007) |
