A rolling disaster usually starts with a power outage or a problem with network communication lines. It is an event in which replication to the secondary (disaster recovery) site fails before the primary (production) data center fails. During the interim between replication failure and failure of the primary data center, the primary data center’s production servers continue to produce data that is not being replicated (i.e., data lag) and is therefore lost.
This paper explains the risks that rolling disasters pose to synchronous, asynchronous, and other replication strategies and shows how Axxana’s Phoenix eliminates those risks.
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