Server-side path selection in multi virtual server environment
AssigneeInternational Business Machines Corporation
InventorsSanket Rathi, Vamshikrishna Thatikonda, Venkata Naga Seshaiah Anumula
Life of this patent
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Abstract
Embodiments describe an approach for improving path selection in multi-virtual input/output sever environment. Embodiments, send one or more inquiry commands to one or more virtual input/output server's (VIOSs). Further, embodiments, receive one or more server-side cache properties from the one or more VIOSs. Additionally, embodiments, determine one or more preferred paths based on the one or more server-side cache properties, and perform one or more input/output's (I/O's) on the one or more preferred paths.
Claims20
A method for improving path selection in multi-virtual input/output server environment, the method comprising:
- receiving, by the one or more processors, one or more server-side cache properties from one or more virtual input/output server's (VIOSs);
- determining, by the one or more processors, one or more preferred paths based on the one or more server-side cache properties;
- calculating, by the one or more processors, a value for the one or more server-side cache properties, wherein the one or more server-side cache properties have a predetermine value;
- ranking, by the one or more processors, the one or more preferred paths from highest to lowest preference based on the calculated value of the one or more server-side cache properties;
- and
- outputting, by the more or more processors, a list of the one of more server-side cache properties based on the ranking.
A method for improving path selection in multi-virtual input/output server environment, the method comprising:
- marking, by the one or more processors, one or more detected failed paths;
- marking, by the one or more processors, cache on the detected one or more failed paths;
- sending, by the one or more processors, one or more cache invalidation requests to one or more virtual input/output servers (VIOSs);
- determining, by the one or more processors, the one or more VIOS's have not responded with completion to the one or more invalidation requests;
- detecting, by the one or more processors, when the failed paths are back online;
- resending, by the one or more processors, the one or more cache invalidation requests when the failed paths are back online;
- clearing, by the one or more processors, the marked cache and the cache invalidation requests on the one or more failed paths;
- and
- failing over, by the one or more processors, the one or more I/O's onto the next preferred path.
A computer system for improving path selection in multi-virtual input/output server environment, the computer system comprising:
- one or more computer processors;
- one or more computer readable storage devices;
- program instructions stored on the one or more computer readable storage devices for execution by at least one of the one or more computer processors, the stored program instructions comprising:
- program instructions to receive one or more server-side cache properties from one or more virtual input/output server's (VIOSs);
- program instructions to determine one or more preferred paths based on the one or more server-side cache properties;
- program instructions to calculate a value for the one or more server-side cache properties, wherein the one or more server-side cache properties have a predetermine value;
- program instructions to rank the one or more preferred paths from highest to lowest preference based on the calculated value of the one or more server-side cache properties;
- and
- program instructions to output a list of the one of more server-side cache properties based on the ranking.
Dependencies are inferred from the claim text.