| 摘要 |
A method for controlling write order in a remote data storage system used for asynchronous replication. The data backup method includes receiving writes issued concurrently by a host prior to any being completed. An async write manager, such as a software application on a storage controller or on a host, operates to group each of the writes into a concurrency group with a replica write corresponding to each of the host writes being queued for transmittal over a link to a remote data storage system. The replica writes each include a concurrency group identifier, such as a group number or last completed write number, that identifies which concurrency group the replica has been assigned. The method includes transferring the replica writes to the remote data storage system and processing the concurrency group identifiers with a write order manager to determine which subsets of the replica writes to issue concurrently.
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