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US07930496B2 Processing a read request to a logical volume while relocating a logical volume from a first storage location to a second storage location using a copy relationship 失效
在将逻辑卷从第一存储位置重新定位到第二存储位置时使用复制关系处理对逻辑卷的读取请求

Processing a read request to a logical volume while relocating a logical volume from a first storage location to a second storage location using a copy relationship
Abstract:
Provided are a method, system, and article of manufacture for relocating a logical volume from a first storage location to a second storage location using a copy relationship. An operation is initiated to move a logical volume from a first storage location to a second storage location. A relationship is established between the first and second storage locations to copy data in the logical volume from the first storage location to the second storage location. A read request is received to data in the logical volume while copying the data in the logical volume from the first storage location to the second storage location. A determination is made, in response to the read request, whether the requested data is at a first copy of the logical volume in the first storage location or a second copy of the logical volume at the second storage location. The requested data is returned from the determined first or second copy of the logical volume while the logical volume is being copied from the first storage location to the second storage location.
Abstract(Chinese):

提供了使用复制关系将逻辑卷从第一存储位置重新定位到第二存储位置的方法，系统和制品。 启动操作以将逻辑卷从第一存储位置移动到第二存储位置。 在第一和第二存储位置之间建立关系以将逻辑卷中的数据从第一存储位置复制到第二存储位置。 当逻辑卷中的数据从第一存储位置复制到第二存储位置时，接收到逻辑卷中的数据的读取请求。 响应于读取请求，确定所请求的数据是处于第一存储位置中的逻辑卷的第一副本还是在第二存储位置处的逻辑卷的第二副本。 当逻辑卷从第一存储位置复制到第二存储位置时，从确定的逻辑卷的第一或第二副本返回所请求的数据。

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