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STORAGE SYSTEM WITH CONCURRENT FAN-OUT ASYNCHRONOUS REPLICATION USING DECOUPLED REPLICATION SESSIONS
STORAGE SYSTEM WITH CONCURRENT FAN-OUT ASYNCHRONOUS REPLICATION USING DECOUPLED REPLICATION SESSIONS
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机译:使用解耦复制会话进行并发扇出异步复制的存储系统
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摘要
A first storage system in one embodiment participates in a cycle-based asynchronous replication process with multiple additional storage systems. The first storage system establishes replication sessions with respective ones of the additional storage systems for replication of source data. For each of multiple cycles, the first storage system captures a snapshot of the source data for a current cycle, generates differential data between the snapshot and a corresponding snapshot for a previous cycle, and transmits the differential data to the additional storage systems in their respective replication sessions. In conjunction with completion of transmission of the differential data to a given one of the additional storage systems, the corresponding replication session determines whether or not a snapshot of the source data for a subsequent cycle is available. If there is no such snapshot available, the replication session triggers capture of the snapshot of the source data for the subsequent cycle.
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