An access request processing method, wherein the method is performed by a computer system, the computer system comprises a processor and a non-volatile memory, NVM, and the method comprises: receiving a write request for writing to-be-written data; determining (310, 315) an object cache page corresponding to the to-be-written data, wherein the object cache page is a memory page for caching file data of an object file in internal memory of the computer system, wherein the to-be-written data is used to modify the file data in the object cache page; characterized in that the method further comprises: determining that the NVM stores a log chain of the object cache page, wherein the log chain of the object cache page comprises a first data node, the first data node comprises information about a first log data chunk, and the first log data chunk comprises modified data of the object cache page during a modification; wherein the first data node is generated during at least one modification to the cache page; inserting a second data node into the log chain of the object cache page, wherein the second data node comprises information about a second log data chunk of the object cache page, the second log data chunk is at least partial of the to-be-written data, and the information about the second log data chunk comprises the second log data chunk or a storage address of the second log data chunk in the NVM; determining that an intra-page location of the second log data chunk overlaps an intrapage location of the first log data chunk, wherein the intra-page location of the second log data chunk is a location of the second log data chunk in the object cache page, and the intra-page location of the first log data chunk is a location of the first log data chunk in the object cache page; and setting, in the first data node, data that is in the first log data chunk and that overlaps the second log data chunk to invalid data. receiving a write request for writing to-be-written data; determining (310, 315) an object cache page corresponding to the to-be-written data, wherein the object cache page is a memory page for caching file data of an object file in internal memory of the computer system, wherein the to-be-written data is used to modify the file data in the object cache page; characterized in that the method further comprises: determining that the NVM stores a log chain of the object cache page, wherein the log chain of the object cache page comprises a first data node, the first data node comprises information about a first log data chunk, and the first log data chunk comprises modified data of the object cache page during a modification; wherein the first data node is generated during at least one modification to the cache page; inserting a second data node into the log chain of the object cache page, wherein the second data node comprises information about a second log data chunk of the object cache page, the second log data chunk is at least partial of the to-be-written data, and the information about the second log data chunk comprises the second log data chunk or a storage address of the second log data chunk in the NVM; determining that an intra-page location of the second log data chunk overlaps an intrapage location of the first log data chunk, wherein the intra-page location of the second log data chunk is a location of the second log data chunk in the object cache page, and the intra-page location of the first log data chunk is a location of the first log data chunk in the object cache page; and setting, in the first data node, data that is in the first log data chunk and that overlaps the second log data chunk to invalid data. determining that the NVM stores a log chain of the object cache page, wherein the log chain of the object cache page comprises a first data node, the first data node comprises information about a first log data chunk, and the first log data chunk comprises modified data of the object cache page during a modification; wherein the first data node is generated during at least one modification to the cache page; inserting a second data node into the log chain of the object cache page, wherein the second data node comprises information about a second log data chunk of the object cache page, the second log data chunk is at least partial of the to-be-written data, and the information about the second log data chunk comprises the second log data chunk or a storage address of the second log data chunk in the NVM; determining that an intra-page location of the second log data chunk overlaps an intrapage location of the first log data chunk, wherein the intra-page location of the second log data chunk is a location of the second log data chunk in the object cache page, and the intra-page location of the first log data chunk is a location of the first log data chunk in the object cache page; and setting, in the first data node, data that is in the first log data chunk and that overlaps the second log data chunk to invalid data.