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远程数据复制和恢复保证数据统一.pdf

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NETAPP WHITEPAPER
DATA REPLICATION AND RECOVERY OVER ANY
DISTANCE ENSURING 100% DATA CONSISTENCY
Network ApplianceION
All enterprise applications that handle data, such as file systems and databases,
are written so that they can reliably recover from failures that cause the application
to crash. These applications are called crash tolerant, and their recovery is based
on the fact that any changes to their data are written in a very well-defined order
that is controlled by the application. If replication is deployed in an application
environment, any changes to the replica or copy at the remote site must be
applied in exactly the same order as defined by the application at the primary site.
If this order is preserved at the remote site, then crash tolerance is maintained,
and the application can reliably recover. If this order is not preserved, then data
consistency is compromised at the remote site and a reliable recovery cannot

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