Implementing multi-tenancy quality of service using controllers that leverage disk technologies

A method for implementing a quality of service when storing input/output data across a redundant array of independent disks, comprising:

• receiving, by an integrated controller, a classification input designating a quality of service layout for the redundant array of independent disks, the quality of service layout for the array being a three level layout comprising a first partition, a second partition, and an intermediary partition between the first and second partitions disks, the integrated controller utilizes user information along with a data bytes stream in connection with a plurality of counters to determine an offset address for data byte placement according to the quality of service layout,
• wherein the classification input comprises 2-level selection, 3-level selection, or No QoS template selection,
• wherein the 2-level selection comprises the redundant array of independent disks being partitioned into two areas,
• wherein the 3-level selection comprises the redundant array of independent disks being partitioned into three areas,
• wherein the No QoS template selection comprises the redundant array of independent disks not being partitioned;
• receiving, by the integrated controller, the input/output data from at least one of a file system and an upper layer application, the input/output data being associated with the quality of service layout;
• splitting, by the integrated controller, the input/output data into data chunks;
• determining, by the integrated controller, whether the quality of service layout indicates a first priority or a second priority for each of the data chunks;
• placing, by the integrated controller, each of the data chunks across a first partition of a first disk of the redundant array of independent disks and in a first partition of a second disk of the redundant array of independent disks when the quality of service layout indicates the first priority;
• placing each of the data chunks across a second partition of the first disk of the redundant array of independent disks and in a second partition of the second disk of the redundant array of independent disks when the quality of service layout indicates the second priority;
• and
• receiving, as an input, a redundant array of independent disks level designating an erasure code policy for the redundant array of independent disks, the erasure code policy being represented by n=k+m, where k is a variable comprising an original amount of the data chunks, “m” is a variable comprising redundant data added to the original amount of the data chunks to provide protection from failures, and “n” is a variable comprising a total number of the data chunks,
• wherein the erasure code policy comprises expanding and encoding the data chunks with redundant data pieces, reconstructing corrupted data chunks on a first location of the redundant array of independent disks by using information in a second location on the redundant array of independent disks corresponding to the corrupted data chunks, and checking the data chunks for accuracy and recovering any of the data chunks when lost.