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Welcome to the CDP-SIG
website. We are a co-operative, vendor-neutral group working
together to evangelize Continuous Data Protection by both acting as
the world-wide-authority and resource on CDP and by educating IT
professionals on the technological uses and practical applications
of CDP.
We offer reference materials and resources to help you understand
Continuous Data Protection and how it might fit into your IT
environment to help you achieve your data protection and
availability objectives.
CDP Definition
The SNIA DMF CDP SIG defines
CDP as follows:
Continuous data protection (CDP) is a
methodology that continuously captures or tracks data modifications and
stores changes independent of the primary data, enabling recovery points
from any point in the past. CDP systems may be block-, file- or
application-based and can provide fine granularities of restorable
objects to infinitely variable recovery points. So, according to this
definition, all CDP solutions incorporate these three fundamental
attributes:
1. Data changes are continuously captured or tracked
2. All data changes are stored in a separate location from the primary
storage
3. Recovery point objectives are arbitrary and need not be defined in
advance of the actual recovery
A number of recognized technological approaches deliver CDP,
including block-, file- and application-based. Today, many vendors offer
varying degrees of support and awareness of specific application and
data environments. But regardless of the underlying technological
approach utilized, CDP can offer faster data retrieval, enhanced data
protection, and increased business continuity with lower overall cost
and complexity.
CDP Terminology
Any Point In Time: Any Point in Time (copy, replica, etc.)
“APIT” refers to the ability to access or recreate the exact data state
as it existed at any previous point in time. Typically unique to CDP
technology.
Block-based Continuous Data Protection: Continuous Data
Protection that operates at the block level of logical devices. As data
blocks are written to primary storage, copies of the rights are stored
and managed by the CDP system.
Continuous Data Protection (CDP): Continuous Data Protection
is a methodology that continuously captures or tracks data modifications
and stores changes independent of the primary data, enabling recovery
points from any non-predetermined point in the past. CDP systems may be
block-, file- or application-based, and can provide fine granularities
of restorable objects to infinitely variable recovery points.
File-based Continuous Data Protection: (CDP) Continuous Data
Protection that operates at the file level. All changes to files and
file meta data are stored and managed by the CDP system.
Scheduled Point In Time: A SPIT is a Scheduled Point In Time
image that is created in conjunction with external processing to create
a stable recovery point for a file system, database or application.
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