Data storage system modeling

摘要

Described are modeling techniques. In accordance with one or more criteria, a determination may be made as to whether to use a dynamic model or a static model to model performance of components, such as storage devices, of a data storage system. A system may include first and second data storage systems where the first data storage system includes a computer readable medium with first code that performs processing in connection with data storage movement optimizations using one or more models including a dynamic model, and second code that generates and maintains the dynamic model used to model performance of storage devices. The second code may include code for performing first processing to determine device sets each of which does not share back-end resources of the second data storage system with any other device sets, and performing second processing to determine sets of performance curves corresponding to the device sets.

主权项

1. A method of modeling comprising:
performing first processing to build a dynamic model that models performance of components of a data storage system, the components including a plurality of storage devices, the dynamic model including a plurality of groups, wherein each of the plurality of groups does not share back-end resources with any other of the plurality of groups and each of the plurality of groups includes at least one of the plurality of storage devices, the first processing including:
determining the plurality of groups in accordance with differences in I/O throughput obtained when issuing I/O operations to the plurality of storage devices, wherein each of the differences is determined between a first I/O throughput for a first portion of the plurality of storage devices and a second I/O throughput for the first portion, wherein the first I/O throughput is determined when issuing I/O operations to the first portion and the second I/O throughput is determined when issuing I/O operations during a same time period to the first portion and a second portion of the plurality of storage devices; using the dynamic model to model performance of the components; and performing a data movement optimization based on information including first information indicating modeled performance of the components, said data movement optimization including any of: moving data from one of the plurality of storage devices and moving data to one of the plurality of storage devices.