Storage apparatus and data management method

摘要

Storage apparatus and data management methods provide for high-speed copying of a compressed data volume. A control unit of the storage apparatus divides a pool into a plurality of chunks including a plurality of pages storing data, compresses data which is written to a logical volume by a host, and assigns one of the plurality of chunks to a compressed data logical volume which stores the compressed data. When the compressed data logical volume is copied, the control unit makes a page length of the chunk assigned to the compressed data logical volume that is a copy source equivalent to a page length of the chunk assigned to the compressed data logical volume that is the copy destination.

主权项

1. A storage apparatus which is coupled via a network to a host which issues data I/O requests, the storage apparatus comprising:
a storage unit configured to store data which is read and/or written by the host; and a control unit which is configured to:
provide logical volumes including a compressed data logical volume for the host,manage storage areas which are provided by the storage unit as a pool, wherein the pool is divided into a plurality of chunks having a plurality of pages, and each of the chunks is associated with at least one of the logical volumes, wherein each of the chunks has a storage address;compress data which is written to the compressed data logical volume by the host, andallocate a page in a chunk which is associated with the compressed data logical volume to the compressed data logical volume, wherein, when making a copy of the compressed data logical volume, the control unit is further configured to:
assign a chunk having pages of the same size as the page in the chunk associated with the compressed data logical volume to a copy destination logical volume, andcopy data of the compressed data logical volume in order of a storage address of the chunk associated with the compressed data logical volume without decompressing the data.