Managing remote data replication

摘要

Various systems, processes, and products may be used to manage remote replication of data. In particular implementations, a system, process, and product for managing remote replication of data may include the ability to receive writes from an external system, request an ordered index for the writes, and send the writes to at least one storage system. The system, process, and product may also include the ability to receive writes from the at least one storage system, receive ordered indexes for the writes from the external system and the at least one storage system, and store the writes based on the indexes.

主权项

1. A system comprising:
an index generator adapted to receive a plurality of requests and generate a plurality of responses for each request, each response containing a sequenced index based on the order in which the request was received; at least two storage systems communicating with each other to store writes received from one or more external systems in a synchronous manner, each storage system adapted to:
receive writes from an external system;request an index from the index generator for each write;send the writes to the at least one other storage system;receive writes from the at least one other storage system;receive indexes from the index generator for writes from the at least one other storage system independently of the writes received from the at least one other storage system;store the writes from the external system and the at least one other storage system based on the ordered indexes received from the index generator; andreport a completion of the writes received from the external system to the external system after completion of the writes on the at least one other storage system.