| 摘要 |
The present invention relates to a computer implemented method for a logging process in a data storage system (100) comprising a set of storage tiers (115), each storage tier of the set of storage tiers (115) having different performance characteristics, wherein the set of storage tiers (115) is divided into a plurality of subsets of storage tiers (115A, 115B, 115C, 115D) using the performance characteristics, the method comprising: initiating the logging process for creating a separate log file (121A, 121B, 121C, 121D) for each of the plurality of subsets of storage tiers (115A, 115B, 115C, 115D) for maintaining a history of data changes in the subset of storage tiers, thereby creating a plurality of log files (121); in response to a change in data stored in at least one storage tier of a subset of storage tiers of the plurality of subsets of storage tiers (115), generating one or more log records comprising information about the change, and writing the one or more log records into the respective log files (121A, 121B, 21C, 121D). |
