Rolling cache configuration for a data replication system

摘要

Performing data management operations on replicated data in a computer network. Log entries are generated for data management operations of an application executing on a source system. Consistency point entries are used to indicate a time of a known good, or recoverable, state of the application. A destination system is configured to process a copy of the log and consistency point entries to replicate data in a replication volume, the replicated data being a copy of the application data on the source system. When the replicated data represents a known good state of the application, as determined by the consistency point entries, the destination system(s) may perform a storage operation (e.g., snapshot, backup) to copy the replicated data and to logically associate the copied data with a time information (e.g., time stamp) indicative of the source system time when the application was in the known good state.

主权项

1. A method for performing data replication, the method comprising:
receiving, at one or more destination computers, copies of log entries stored in a memory of one or more source computers, wherein the log entries stored in the memory of the one or more source computer are associated with data management operations that modify data on one or more first storage devices, wherein the copies of the log entries on the one or more destination computers are located remotely from the one or more source computers, wherein each copy of the log entries has a unique identifier associated therewith; replaying, on the one or more destination computers, the copies of the log entries to replicate the data stored on the one or more first storage devices to create replicated data on one or more second storage devices; and in response to an interruption in replaying the copies of the log entries on the one or more destination computers, using a first unique identifier associated with a recently processed log entry on the one or more destination computers to identify a subsequent log entry in the memory of the one or more source computers, wherein the subsequent log entry has a second unique identifier that occurs after the first unique identifier of a most recently processed log entry; and performing a mirror operation to synchronize the data stored on the one or more first storage devices with data stored on the one or more destination computers when the subsequent log entry is no longer stored in the memory of the one or more source computers.