Benchmark tool write analysis for a mass storage system
AssigneeEMC Corporation
InventorWilliam Glynn
Life of this patent
Estimating the term…
Abstract
A method for automatically finding the transition interval from a fast write to a delayed fast write, in a mass storage system in which the mass storage system has a plurality of disk drive storage elements controlled by a disk drive controller, the controller having a cache memory through which all data writes pass, and the controller receiving commands and data from at least one host computer.
Claims12
A method for measuring write system performance in a mass storage system, the storage system having a plurality of disk drive storage elements controlled by a disk drive controller, said controller receiving write commands and data from at least one host computer, and using a cache memory in which all received data is stored and from which it is destaged, said method comprising
- clearing a data storage area of the cache memory,
- sending test results representing write times for storage of received data to a system analysis program,
- quantizing said write times data to generate a representation of an I/O rate versus quantized times, and
- automatically determining a fast write to delayed fast write transition interval in said write times data.
Software stored on a computer readable medium to perform the function of measuring write system performance in a mass storage system, the storage system having a plurality of disk drive storage elements controlled by a disk drive controller, said controller receiving write commands and data from at least one host computer, and using a cache memory in which all received data is stored and from which it is destaged, said function comprising
- clearing a data storage area of the cache memory,
- sending test results representing write times for storage of received data to a system analysis program,
- quantizing said write times data to generate a representation of an I/O rate versus quantized times, and
- automatically determining a fast write to delayed fast write transition interval in said write times data.
Dependencies are inferred from the claim text.