# US 10,311,032 B2 · Recording medium, log management method, and log management apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,311,032 B2 - Document ID: US10311032B2 - Status: Granted - Kind: B2 - Application number: 15/211,000 - Filed: 2016-07-15 - Published: 2017-03-02 - Granted: 2019-06-04 - Earliest claimed: 2015-08-31 - Assignees: Fujitsu Limited - Applicants: Fujitsu Limited - Inventors: Kenichi Narita - Web page: https://patentgrep.com/patent/US10311032B2 ## CPC - G06F 16/215: Improving data quality; Data cleansing, e.g. de-duplication, removing invalid entries or correcting typographical errors - G06F 17/40: Data acquisition and logging (for input to computer G06F3/00) - G06F 11/3093: {Configuration details thereof, e.g. installation, enabling, spatial arrangement of the probes} - G06F 11/3409: {for performance assessment} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A non-transitory computer-readable recoding medium having stored therein a log management program that causes a computer to execute a process that includes suspending, in accordance with a change in information related to an operation of a device under management, deletion of log items of log data of the device performed in accordance with log pattern identification information generated according to a regularity of the log items of the log data, determining, according to a change situation of the information related to the operation, suitability of the deletion of the log items performed in accordance with the log pattern identification information, and updating, when the deletion is determined to be unsuitable, the log pattern identification information according to a log item stored after the deletion has been suspended. ## Claims ### Claim 1 A non-transitory computer-readable recoding medium having stored therein a log management program that causes a processor to execute a process comprising: suspending, in accordance with a change in information related to an operation of a device under management, deletion of log items of log data of the device performed in accordance with log pattern identification information generated according to a regularity of the log items of the log data; determining, according to a change situation of the information related to the operation, suitability of the deletion of the log items performed in accordance with the log pattern identification information; and updating, when the deletion is determined to be unsuitable, the log pattern identification information according to a log item stored after the deletion has been suspended. ### Claim 2 (depends on 1) The recording medium according to claim 1, the process further comprising: generating new log pattern identification information that is different from the log pattern identification information when the deletion of the log items performed in accordance with the log pattern identification information is determined to be unsuitable according to a change situation of information related to an operation of the device performed while the deletion is suspended. ### Claim 3 (depends on 1) The recording medium according to claim 1, the process further comprising: using the log pattern identification information when the deletion of the log items performed in accordance with the log pattern identification information is determined to be suitable according to a change situation of information related to an operation of the device performed while the deletion is suspended. ### Claim 4 (depends on 1) The recording medium according to claim 1, the process further comprising: after the deletion has been suspended updating the log pattern identification information when a state after the change in the information related to the operation of the device has lasted for a predetermined period, and using the log pattern identification information when the state after the change does not last for the predetermined period. ### Claim 5 (depends on 1) The recording medium according to claim 1, the process further comprising: detecting that a change has been made to the information related to the operation of the device when detecting that a change has been made to a waveform that is based on information indicating a status of use of a resource of the device per predetermined time. ### Claim 6 A log management method conducted by a processor, the log management method comprising: suspending, in accordance with a change in information related to an operation of a device under management, deletion of log items of log data of the device performed in accordance with log pattern identification information generated according to a regularity of the log items of the log data; determining, according to a change situation of the information related to the operation, suitability of the deletion of the log items performed in accordance with the log pattern identification information; and updating, when the deletion is determined to be unsuitable, the log pattern identification information according to a log item stored after the deletion has been suspended. ### Claim 7 A log management apparatus comprising: a processor configured to execute a process including: suspending, in accordance with a change in information related to an operation of a device under management, deletion of log items of log data of the device performed in accordance with log pattern identification information generated according to a regularity of the log items of the log data; determining, according to a change situation of the information related to the operation, suitability of the deletion of the log items performed in accordance with the log pattern identification information; and updating, when the deletion is determined to be unsuitable, the log pattern identification information according to a log item stored after the deletion has been suspended.