# US 2018/0321850 A1 · Reduction of processing overhead for point in time copy to allow access to time locked data > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0321850 A1 - Document ID: US20180321850A1 - Status: Published application - Kind: A1 - Application number: 15/589,373 - Filed: 2017-05-08 - Published: 2018-11-08 - Earliest claimed: 2017-05-08 - Assignees: International Business Machines Corporation - Applicants: International Business Machines Corporation - Inventors: Matthew G. Borlick; Lokesh M. Gupta - Web page: https://patentgrep.com/patent/US20180321850A1 ## CPC - G06F 3/065: {Replication mechanisms} - G06F 3/0604: {Improving or facilitating administration, e.g. storage management} - G06F 3/067: {Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]} - G06F 3/0683: {Plurality of storage devices} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A computational device generates a point in time copy of one or more regions of a time locked data set, in response to receiving one or more I/O operations directed to the time locked data set. The one or more I/O operations are performed on the point in time copy of the one or more regions of the time locked data set, in response to generating the point in time copy of the one or more regions of the time locked data set. ## Claims ### Claim 1 A method, comprising: generating, by a computational device, a point in time copy of one or more regions of a time locked data set, in response to receiving one or more Input/Output (I/O) operations directed to the time locked data set; and performing the one or more I/O operations on the point in time copy of the one or more regions of the time locked data set, in response to generating the point in time copy of the one or more regions of the time locked data set. ### Claim 2 (depends on 1) The method of claim 1, wherein the one or more regions comprise an entirety of the time locked data set. ### Claim 3 (depends on 1) The method of claim 1, wherein the one or more regions comprise those regions of the time locked data set to which the I/O operations are directed. ### Claim 4 (depends on 1) The method of claim 1, wherein the generating of the point in time copy of the one or more regions of the time locked data set is performed subsequent to the one or more I/O operations exceeding a predetermined threshold number. ### Claim 5 (depends on 1) The method of claim 1, the method further comprising: preventing the I/O operations to be performed on the time locked data set. ### Claim 6 (depends on 1) The method of claim 1, wherein the one or more regions include one or more volumes or parts of volumes in which the time locked data set is stored. ### Claim 7 (depends on 1) The method of claim 1, wherein on expiry of a time lock on the time locked data set, additional I/O operations are directed to the time locked data set and not directed to the point in time copy. ### Claim 8 A system, comprising: a memory; and a processor coupled to the memory, wherein the processor performs operations, the operations comprising: generating a point in time copy of one or more regions of a time locked data set, in response to receiving one or more Input/Output (I/O) operations directed to the time locked data set; and performing the one or more I/O operations on the point in time copy of the one or more regions of the time locked data set, in response to generating the point in time copy of the one or more regions of the time locked data set. ### Claim 9 (depends on 8) The system of claim 8, wherein the one or more regions comprise an entirety of the time locked data set. ### Claim 10 (depends on 8) The system of claim 8, wherein the one or more regions comprise those regions of the time locked data set to which the I/O operations are directed. ### Claim 11 (depends on 8) The system of claim 8, wherein the generating of the point in time copy of the one or more regions of the time locked data set is performed subsequent to the one or more I/O operations exceeding a predetermined threshold number. ### Claim 12 (depends on 8) The system of claim 8, the operations further comprising: preventing the I/O operations to be performed on the time locked data set. ### Claim 13 (depends on 8) The system of claim 8, wherein the one or more regions include one or more volumes or parts of volumes in which the time locked data set is stored. ### Claim 14 (depends on 8) The system of claim 8, wherein on expiry of a time lock on the time locked data set, additional I/O operations are directed to the time locked data set and not directed to the point in time copy. ### Claim 15 A computer program product, the computer program product comprising a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code configured to perform operations on a processor of a computational device, the operations comprising: generating, by the computational device, a point in time copy of one or more regions of a time locked data set, in response to receiving one or more Input/Output (I/O) operations directed to the time locked data set; and performing the one or more I/O operations on the point in time copy of the one or more regions of the time locked data set, in response to generating the point in time copy of the one or more regions of the time locked data set. ### Claim 16 (depends on 15) The computer program product of claim 15, wherein the one or more regions comprise an entirety of the time locked data set. ### Claim 17 (depends on 15) The computer program product of claim 15, wherein the one or more regions comprise those regions of the time locked data set to which the I/O operations are directed. ### Claim 18 (depends on 15) The computer program product of claim 15, wherein the generating of the point in time copy of the one or more regions of the time locked data set is performed subsequent to the one or more I/O operations exceeding a predetermined threshold number. ### Claim 19 (depends on 15) The computer program product of claim 15, the operations further comprising: preventing the I/O operations to be performed on the time locked data set. ### Claim 20 (depends on 15) The computer program product of claim 15, wherein the one or more regions include one or more volumes or parts of volumes in which the time locked data set is stored. ### Claim 21 (depends on 15) The computer program product of claim 15, wherein on expiry of a time lock on the time locked data set, additional I/O operations are directed to the time locked data set and not directed to the point in time copy. ### Claim 22 A storage controller, wherein the storage controller is configured to perform operations, the operations comprising: generating a point in time copy of one or more regions of a time locked data set, in response to receiving one or more Input/Output (I/O) operations directed to the time locked data set; and performing the one or more I/O operations on the point in time copy of the one or more regions of the time locked data set, in response to generating the point in time copy of the one or more regions of the time locked data set. ### Claim 23 (depends on 22) The storage controller of claim 22, wherein the one or more regions comprise an entirety of the time locked data set. ### Claim 24 (depends on 22) The storage controller of claim 22, wherein the one or more regions comprise those regions of the time locked data set to which the I/O operations are directed. ### Claim 25 (depends on 22) The storage controller of claim 22, wherein the generating of the point in time copy of the one or more regions of the time locked data set is performed subsequent to the one or more I/O operations exceeding a predetermined threshold number.