# US 2025/0147658 A1 · Storage system configured to collaborate with host device to implement dynamically adaptive input-output timeout values > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0147658 A1 - Document ID: US20250147658A1 - Status: Published application - Kind: A1 - Application number: 18/502,260 - Filed: 2023-11-06 - Published: 2025-05-08 - Earliest claimed: 2023-11-06 - Assignees: Dell Products L.P. - Applicants: Dell Products L.P. - Inventors: Sanjib Mallick; Vinay G. Rao; Krishna Deepak Nuthakki; Arieh Don - Web page: https://patentgrep.com/patent/US20250147658A1 ## CPC - G06F 3/0604: {Improving or facilitating administration, e.g. storage management} - G06F 3/061: {Improving I/O performance} - G06F 3/0611: {in relation to response time} - G06F 3/0659: {Command handling arrangements, e.g. command buffers, queues, command scheduling} - G06F 3/0683: {Plurality of storage devices} - G06F 3/0689: {Disk arrays, e.g. RAID, JBOD} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract An apparatus in an illustrative embodiment comprises at least one processing device comprising a processor coupled to a memory. The at least one processing device is configured to receive in a storage system from at least one host device at least first and second different input-output timeout values for respective first and second different logical storage devices of the storage system, to store the received input-output timeout values in association with respective identifiers of the first and second logical storage devices in at least one data structure of the storage system, and to control processing of input-output operations, received in the storage system from the at least one host device and targeting respective ones of the first and second logical storage devices, based at least in part on the corresponding input-output timeout values stored in the at least one data structure of the storage system. ## Claims ### Claim 1 An apparatus comprising: at least one processing device comprising a processor coupled to a memory; the at least one processing device being configured: to receive in a storage system from at least one host device at least first and second different input-output timeout values for respective first and second different logical storage devices of the storage system; to store the received input-output timeout values in association with respective identifiers of the first and second logical storage devices in at least one data structure of the storage system; and to control processing of input-output operations, received in the storage system from the at least one host device and targeting respective ones of the first and second logical storage devices, based at least in part on the corresponding input-output timeout values stored in the at least one data structure of the storage system. ### Claim 2 (depends on 1) The apparatus of claim 1 wherein the at least one processing device comprises at least a portion of the storage system. ### Claim 3 (depends on 1) The apparatus of claim 1 wherein the first and second logical storage devices have respective first and second different device types. ### Claim 4 (depends on 3) The apparatus of claim 3 wherein the first and second input-output timeout values are established for the respective first and second logical storage devices based at least in part on their respective first and second device types. ### Claim 5 (depends on 3) The apparatus of claim 3 wherein the first device type of the first logical storage device comprises a locally-stored device type and the second device type of the second logical storage device comprises a remotely-stored device type and further wherein the first input-output timeout value of the first logical storage device is less than the second input-output timeout value of the second logical storage device. ### Claim 6 (depends on 1) The apparatus of claim 1 wherein the first device type of the first logical storage device comprises a non-replicated device type and the second device type of the second logical storage device comprises a replicated device type and further wherein the first input-output timeout value of the first logical storage device is less than the second input-output timeout value of the second logical storage device. ### Claim 7 (depends on 1) The apparatus of claim 1 wherein the first and second input-output timeout values comprise respective first and second host-side input-output timeout values, and wherein controlling processing of the input-output operations based at least in part on the corresponding input-output timeout values comprises establishing in the storage system respective first and second storage-side instances of the first and second host-side input-output timeout values for use in the storage system. ### Claim 8 (depends on 7) The apparatus of claim 7 wherein the first and second storage-side instances of the respective first and second host-side input-output timeout values are less than the respective first and second host-side input-output timeout values. ### Claim 9 (depends on 7) The apparatus of claim 7 wherein the storage system utilizes the first and second storage-side instances of the first and second host-side input-output timeout values to determine storage-side timeouts for respective ones of the input-output operations received in the storage system from the at least one host device and targeting respective ones of the first and second logical storage devices. ### Claim 10 (depends on 7) The apparatus of claim 7 wherein the first and second storage-side instances of the respective first and second host-side input-output timeout values are established in the storage system in a manner that ensures that a given one of the input-output operations received in the storage system from a given host device and targeting one of the first and second logical storage devices will time out in the storage system before the given input-output operation times out in the given host device. ### Claim 11 (depends on 1) The apparatus of claim 1 wherein the storage system receives the first and second different input-output timeout values from the at least one host device in at least one command sent from the at least one host device to the storage system. ### Claim 12 (depends on 1) The apparatus of claim 1 wherein controlling processing of the input-output operations based at least in part on the corresponding input-output timeout values comprises prioritizing input-output operations targeting one of the first and second logical storage devices having a relatively lower timeout value over input-output operations targeting another one of the first and second logical storage devices having a relatively higher timeout value. ### Claim 13 (depends on 12) The apparatus of claim 12 wherein the prioritizing of the input-output operations is based at least in part on a combination of the relative timeout values and respective service level objectives associated with the respective first and second logical storage devices. ### Claim 14 (depends on 1) The apparatus of claim 1 wherein controlling processing of the input-output operations based at least in part on the corresponding input-output timeout values comprises aborting a given input-output operation in the storage system with a retriable status so as to prevent the given input-output operation from timing out in the at least one host device. ### Claim 15 A computer program product comprising a non-transitory processor-readable storage medium having stored therein program code of one or more software programs, wherein the program code, when executed by at least one processing device comprising a processor coupled to a memory, causes the at least one processing device: to receive in a storage system from at least one host device at least first and second different input-output timeout values for respective first and second different logical storage devices of the storage system; to store the received input-output timeout values in association with respective identifiers of the first and second logical storage devices in at least one data structure of the storage system; and to control processing of input-output operations, received in the storage system from the at least one host device and targeting respective ones of the first and second logical storage devices, based at least in part on the corresponding input-output timeout values stored in the at least one data structure of the storage system. ### Claim 16 (depends on 15) The computer program product of claim 15 wherein the first and second input-output timeout values comprise respective first and second host-side input-output timeout values, and wherein controlling processing of the input-output operations based at least in part on the corresponding input-output timeout values comprises establishing in the storage system respective first and second storage-side instances of the first and second host-side input-output timeout values for use in the storage system. ### Claim 17 (depends on 15) The computer program product of claim 15 wherein controlling processing of the input-output operations based at least in part on the corresponding input-output timeout values comprises prioritizing input-output operations targeting one of the first and second logical storage devices having a relatively lower timeout value over input-output operations targeting another one of the first and second logical storage devices having a relatively higher timeout value. ### Claim 18 A method comprising: receiving in a storage system from at least one host device at least first and second different input-output timeout values for respective first and second different logical storage devices of the storage system; storing the received input-output timeout values in association with respective identifiers of the first and second logical storage devices in at least one data structure of the storage system; and controlling processing of input-output operations, received in the storage system from the at least one host device and targeting respective ones of the first and second logical storage devices, based at least in part on the corresponding input-output timeout values stored in the at least one data structure of the storage system. ### Claim 19 (depends on 18) The method of claim 18 wherein the first and second input-output timeout values comprise respective first and second host-side input-output timeout values, and wherein controlling processing of the input-output operations based at least in part on the corresponding input-output timeout values comprises establishing in the storage system respective first and second storage-side instances of the first and second host-side input-output timeout values for use in the storage system. ### Claim 20 (depends on 18) The method of claim 18 wherein controlling processing of the input-output operations based at least in part on the corresponding input-output timeout values comprises prioritizing input-output operations targeting one of the first and second logical storage devices having a relatively lower timeout value over input-output operations targeting another one of the first and second logical storage devices having a relatively higher timeout value.