| 摘要 |
A system for cache promotion comprises: a server which includes a nonvolatile persistent memory having a cache data area that has a plurality of cache segments, and a server processor managing cache directory information which indicates whether each of the cache segments is valid or not, wherein a cache segment is valid when the cache segment is allocated for caching data; and a storage which includes a storage memory storing backup information of the cache directory information, a plurality of storage devices, and a storage processor configuring one or more logical units by storage space of the plurality of storage devices. When the server recovers from being down, the server processor is configured to obtain the backup information of the cache directory information from the storage, and, when the backup information indicates that a particular cache segment is invalid, to invalidate the particular cache segment in the cache directory information. |
