Computing system and backup method using the same

摘要

This invention provides a computing system in which multiple remote copy destination sites exist and, even if a failure occurs in a copy source volume in a remote copy source site, it becomes possible in at least one remote copy destination site to establish backup in which data must be determined at a certain point in time. The computing system of this invention is characterized by, before the in-storage copy function performing in storage copy in the remote copy source site, setting the pair status of the remote copy destination volume in at least one storage system in multiple remote copy destination storage systems and the remote copy source volume to the mode for terminating remote copy and, after the in-storage copy is completed, changing the above-mentioned pair status to the mode for starting remote copy.

主权项

1. A computing system comprising:
a remote copy source storage system; and a first and a second remote copy destination storage systems, wherein, the remote copy source storage system includes:
a first volume accessed by a host computer; anda second volume, wherein a local copy pair is set between the first volume and the second volume, each of the remote copy destination storage systems includes a remote copy destination volume, wherein a synchronous remote copy pair is set between a first remote copy destination volume in the first remote copy destination storage system and the second volume, and an asynchronous remote copy pair is set between a second remote copy destination volume in the second remote copy destination storage system and the second volume and, before executing a copy from the first volume to the second volume in the remote copy source storage system, the remote copy source storage system suspends a remote copy from the second volume in the remote copy source storage system to the first remote copy destination volume in the first remote copy destination storage system to create a first determined backup volume in the first remote copy destination storage system and, after the execution of the copy from the first volume to the second volume in the remote copy source storage system, the remote copy source storage system copies differential data from the second volume in the remote copy source storage system to the second remote copy destination volume in the second remote copy destination storage system to create a second determined backup volume in the second remote copy destination storage system.