Recovery processing for database in persistent system

A computer program product comprising one or more computer-readable storage media having thereon computer-executable instructions that are executable by one or more processors of a computing system to cause the computing system to implement the following as part of a recovery:

• identify one or more log buffers that are marked as being complete in the persistent system, each of the one or more log buffers being marked as complete including post-commit processing information for each of a plurality of different written record versions that are also persisted in the persistent system;
• and
• for each of the one or more identified complete log buffers, use post-commit processing information included within the log buffer to:
• identify each written record version of the plurality of different written record versions that is created or updated by a transaction using the post-commit processing information, the post-commit processing information including both a commit marker and a pointer reference for each of the written record versions;
• for each written record version that is created or updated by the transaction, update a valid interval of said each written record version by using a commit marker of the post-commit processing information;
• providing the updated valid interval to the persistent system;
• and
• issuing a persist command to the persistent system, subsequent to providing the updated valid interval to the persistent system, which causes data provided to the persistent system and that is temporarily maintained in a buffer of the persistent system to be persisted, thereby further facilitating making the updated valid interval durable.

A system comprising:

• one or more processors;
• a persistent system capable of persisting data;
• a bus coupling the one or processors to the persistent system, wherein the persistent system has an addressing system that is addressable by the one or more processors via the system bus;
• and
• a recovery system configured to communicate over the bus with the persistent system to implement a recovery by performing the following:
• an act of identifying one or more log buffers that are marked as being complete in the persistent system each of the one or more log buffers being marked as complete including post-commit processing information for each of a plurality of different written record versions that are also persisted in the persistent system;
• and
• for each of the one or more identified complete log buffers, performing the following using post-commit processing information included within the log buffer to:
• identify each written record version of the plurality of different written record versions that is created or updated by a transaction using the post-commit processing information, the post-commit processing information including both a commit marker and a pointer reference for each of the written record versions;
• for each written record version that is created or updated by the transaction, update a valid interval of said each written record version by using a commit marker of the post-commit processing information;
• providing the updated valid interval to the persistent system;
• and
• issuing a persist command to the persistent system, subsequent to providing the updated valid interval to the persistent system, which causes data provided to the persistent system and that is temporarily maintained in a buffer of the persistent system to be persisted, thereby further facilitating making the updated valid interval durable.