# US 10,372,374 B2 · System and method for providing input/output determinism for servers hosting remotely accessible storages > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,372,374 B2 - Document ID: US10372374B2 - Status: Granted - Kind: B2 - Application number: 15/797,815 - Filed: 2017-10-30 - Published: 2018-05-10 - Granted: 2019-08-06 - Earliest claimed: 2016-11-08 - Assignees: Excelero Storage Ltd. - Applicants: Excelero Storage Ltd. - Inventors: Yaniv Romem; Omri Mann; Ofer Oshri - Web page: https://patentgrep.com/patent/US10372374B2 ## CPC - G06F 3/0655: {Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices} - G06F 3/061: {Improving I/O performance} - G06F 3/0611: {in relation to response time} - G06F 3/0629: {Configuration or reconfiguration of storage systems} - G06F 3/0659: {Command handling arrangements, e.g. command buffers, queues, command scheduling} - G06F 3/067: {Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]} - G06F 13/102: {where the program performs an interfacing function, e.g. device driver (G06F13/105 takes precedence; contention policies within device drivers G06F9/4881; scheduling within device drivers G06F9/52)} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Systems and methods for providing input/output (I/O) determinism. An I/O instruction and at least one service level indicator are received, wherein the at least one service level indicator includes a required time for executing the I/O instruction. It is determined whether the I/O instruction can be executed on the storage within the required time. When it is not determined that the I/O instruction can be executed on the storage within the required time, a notification is sent. ## Claims ### Claim 1 A method for providing input/output (I/O) determinism for a server hosting at least a remotely accessible storage, comprising: receiving an I/O instruction and at least one service level indicator from a client device, wherein the at least one service level indicator includes a required time for executing the I/O instruction; determining whether the I/O instruction can be executed on the storage within the required time, wherein determining whether the I/O instruction can be executed on the storage within the required time further comprises: determining a first latency of communication between the server and the client device; and determining a first execution time for executing the I/O instruction on the storage, wherein it is determined that the I/O instruction can be executed on the storage within the required time when a sum of the first latency and the first execution time is less than the required time; and sending, to the client device, a notification, when it is not determined that the I/O instruction can be executed on the storage within the required time. ### Claim 2 (depends on 1) The method of claim 1, further comprising: executing the I/O instruction on the storage, when it is determined that the I/O instruction can be executed on the storage within the required time. ### Claim 3 (depends on 1) The method of claim 1, further comprising: determining a second latency, wherein the second latency is a minimal latency between the client device and another server; determining a second execution time, wherein the second execution time is a minimal execution time by a storage of the other server, wherein it is determined that the I/O instruction can be executed on the storage of the other server within the required time when a sum of the first latency, the first execution time, the second latency, and the second execution time is less than the required time; and sending, to the storage of the other server, the I/O instruction for execution, when it is determined the I/O instruction can be executed on the storage of the other server within the required time. ### Claim 4 (depends on 1) A non-transitory computer readable medium having stored thereon instructions for causing a processing circuitry to execute the method according to claim 1. ### Claim 5 A system for providing input/output (I/O) determinism, comprising: a storage; a processing circuitry; and a memory, the memory containing instructions that, when executed by the processing circuitry, configure the system to: receive an I/O instruction and at least one service level indicator from a client device, wherein the at least one service level indicator includes a required time for executing the I/O instruction; determine a first latency of communication between the system and the client device; determine a first execution time for executing the I/O instruction on the storage; determine whether the I/O instruction can be executed on the storage within the required time, wherein it is determined that the I/O instruction can be executed on the storage within the required time when a sum of the first latency and the first execution time is less than the required time; and send, to the client device, a notification, when it is not determined that the I/O instruction can be executed on the storage within the required time. ### Claim 6 (depends on 5) The system of claim 5, wherein the system is further configured to: execute the I/O instruction on the storage, when it is determined that the I/O instruction can be executed on the storage within the required time. ### Claim 7 (depends on 5) The system of claim 5, wherein the system is further configured to: determine a second latency, wherein the second latency is a minimal latency between the client device and another server; determine a second execution time, wherein the second execution time is a minimal execution time by a storage of the other server, wherein it is determined that the I/O instruction can be executed on the storage of the other server within the required time when a sum of the first latency, the first execution time, the second latency, and the second execution time is less than the required time; and send, to the storage of the other server, the I/O instruction for execution, when it is determined the I/O instruction can be executed on the storage of the other server within the required time. ### Claim 8 A method for providing input/output (I/O) determinism for a server hosting at least a storage, the server including a processing circuitry, comprising: sending, by the processing circuitry to the storage, an I/O instruction and at least one service level indicator, wherein the at least one service level indicator includes a required time for executing the I/O instruction; determining, by the storage, whether the I/O instruction can be executed on the storage within the required time; and sending, to the processing circuitry by the storage, a notification, when it is not determined that the I/O instruction can be executed on the storage within the required time; sending the I/O instruction to another server including at least one other storage, wherein the I/O instruction is sent to the other server when the I/O instruction can be executed on the at least one other storage within the required time; determining a latency of communication between the server and the other server; determining an execution time for executing the I/O instruction on the at least one other storage, wherein the I/O instruction can be executed on the at least one other storage within the required time when a sum of the determined latency and the determined execution time is less than the required time; and sending, to the at least one other storage, the I/O instruction for execution, when it is determined that the I/O instruction can be executed on the at least one other storage within the required time. ### Claim 9 (depends on 8) The method of claim 8, further comprising: executing the I/O instruction on the storage, when it is determined that the I/O instruction can be executed on the storage within the required time. ### Claim 10 (depends on 8) The method of claim 8, further comprising: determining a first execution time for executing the I/O instruction on the storage; determining a second execution time for executing the I/O instruction on another storage hosted by the server; and executing the I/O instruction on the storage having the lowest execution time among the first execution time and the second execution time. ### Claim 11 (depends on 8) A non-transitory computer readable medium having stored thereon instructions for causing a processing circuitry to execute the method according to claim 8. ### Claim 12 A system for providing input/output (I/O) determinism, comprising: a storage; a processing circuitry; and a memory, the memory containing instructions that, when executed by the processing circuitry, configure the system to: sending, by the processing circuitry to the storage, an I/O instruction and at least one service level indicator, wherein the at least one service level indicator includes a required time for executing the I/O instruction; determining, by the storage, whether the I/O instruction can be executed on the storage within the required time; and sending, to the processing circuitry by the storage, a notification, when it is not determined that the I/O instruction can be executed on the storage within the required time; send the I/O instruction to another server including at least one other storage; determine a latency of communication between the server and the other server; determine an execution time for executing the I/O instruction on the at least one other storage, wherein the I/O instruction can be executed on the at least one other storage within the required time when a sum of the determined latency and the determined execution time is less than the required time; and send, to the at least one other storage, the I/O instruction for execution, when it is determined that the I/O instruction can be executed on the at least one other storage within the required time. ### Claim 13 (depends on 12) The system of claim 12, wherein the system is further configured to: execute the I/O instruction on the storage, when it is determined that the I/O instruction can be executed on the storage within the required time. ### Claim 14 (depends on 12) The system of claim 12, wherein the system is further configured to: determine a first execution time for executing the I/O instruction on the storage; determine a second execution time for executing the I/O instruction on another storage hosted by the server; and execute the I/O instruction on the storage having the lowest execution time among the first execution time and the second execution time.