Allocating storage to a thin provisioning logical volume

摘要

A first storage system includes a plurality of first storage devices and is coupled to a computer. A second storage system includes a plurality of second storage devices and is coupled to the first storage system. A first controller provides a thin provisioning logical volume (LU) to the computer. A second controller provides an external thin provisioning LU to the first storage system. The first controller provides pool areas associated with the thin provisioning LU, including a first pool area mapped to the external thin provisioning LU, and allocates the first pool area to a first region in the thin provisioning LU to store a write data to the first region in the thin provisioning LU. The second controller allocates at least one of a plurality of pool areas to store the write data to the first region in the thin provisioning LU.

主权项

1. A method implemented in a storage system having:
a first storage system coupled to a computer; and a second storage system coupled to the first storage system, the second storage system including a plurality of second storage devices, the method comprising:
providing, by the first storage system, a thin provisioning logical volume (LU) to the computer:providing, by the second storage system, an external thin provisioning LU to the first storage system;providing pool areas, by the first storage system, which are associated with the thin provisioning LU, including a first pool area mapped to a second region in the external thin provisioning LU;allocating the first pool area to a first region in the thin provisioning LU to store a write data to the first region in the thin provisioning LU from the computer; andallocating at least one of a plurality of external pool areas, which are provided by at least one of the second storage devices, to the second region in the external thin provisioning LU to store the write data to the first region in the thin provisioning LU.