Microsoft Corporation
Persistent storage segment caching for data recovery

Abstract:

Caching storage segments (e.g., pages) loaded from a remote storage such that, during recovery, the cached loaded storage segments may be at least partially recovered without reloading the storage segments from the remote storage. During normal operation of a computing system, storage segments are loaded from remote storage into local memory of a computing system. At some point, either due to eviction of the storage segment due to aging out of the storage segment, or due to writing of the storage segment, it is determined to write at least some of the loaded storage segments into local persistent storage. In conjunction with this, the corresponding storage segment is written to a respective storage address of the local persistent storage. Also, a correlation between an identifier of the storage segment and the respective address in the persistent storage is recorded in a persistent data structure.