Managing high performance storage systems with hybrid storage technologies

A non-transitory computer readable storage medium comprising a computer readable program for managing a solid state unified storage system with hybrid storage technologies comprising check-pointing storage and file-system storage, wherein the computer readable program when executed on a computer causes the computer to perform the steps of:

• monitoring one or more storage request streams to identify operating mode characteristics therein from among a set of possible operating mode characteristics, the set of possible operating mode characteristics corresponding to a set of available operating modes of the hybrid storage technologies and including a number of reads over a given time period, a number of writes over the given time period, sequential write streams in the presence or in the absence of additional concurrent reads and writes, a presence of isolated reads, a presence of a deep queue of reads, the deep queue of reads including additional reads scheduled upon delivery of read completions from a flash for the unified storage system with hybrid storage technologies, the check-pointing storage having a lower capacity and being more write-intensive in comparison to the file-system storage, which has a higher capacity and is less write-intensive;
• identifying a current operating mode from among the set of available operating modes responsive to the identified operating mode characteristics;
• predicting a future operating mode responsive to variations in workload requirements to generate at least one future operating mode prediction, the workload variations including a time evolution of the current operating mode;
• and
• controlling, using a controller, at least one of data placement, wear leveling, garbage collection, and read performance of the storage system, responsive to the at least one future operating mode prediction, the controller being configured for improving the read performance of the storage system by placing duplicate data in the storage system.

A solid state unified storage system with hybrid storage technologies comprising check-pointing storage and file-system storage, comprising:

• a monitor for monitoring one or more storage request streams to identify operating mode characteristics therein from among a set of possible operating mode characteristics, and identifying a current operating mode from among the set of available operating modes responsive to the identified operating mode characteristics, the set of possible operating mode characteristics corresponding to a set of available operating modes of the hybrid storage technologies and including a number of reads over a given time period, a number of writes over the given time period, sequential write streams in the presence or in the absence of additional concurrent reads and writes, a presence of isolated reads, a presence of a deep queue of reads, the deep queue of reads including additional reads scheduled upon delivery of read completions from a flash for the unified storage system with hybrid storage technologies, the check-pointing storage having a lower capacity and being more write-intensive in comparison to the file-system storage, which has a higher capacity and is less write-intensive;
• a predictor for predicting a future operating mode responsive to variations in workload requirements to generate at least one future operating mode prediction, the workload variations including a time evolution of the current operating mode;
• and
• a controller configured for controlling at least one of data placement, wear leveling, garbage collection, and read performance of the storage system responsive to the at least one future operating mode prediction, the controller being further configured for improving the read performance of the storage system by placing duplicate data in the storage system.