Samsung Electronics Co., Ltd.

Proximal Data, Inc.

Thomas R Bolt

Clay Mayers

Zhengyu Yang

T David Evans

Allen Russell Andrews

A system for performing auto-tiering is disclosed. The system may include a plurality of storage devices offering a plurality of resources and organized into storage tiers. The storage devices may store data for virtual machines. A receiver may receive I/O commands and performance data for the virtual machines. A transmitter may transmit responses to the I/O commands. An auto-tiering controller may select storage tiers to store the data for the virtual machines and may migrate data between storage tiers responsive to the performance data. The selection of the storage tiers may optimize the performance of all virtual machines across all storage tiers, factoring the change in performance of the virtual machines and a migration cost to migrate data between storage tiers.

Automatic data placement manager in multi-tier all-flash datacenter

A method and system for transferring data from mass storage devices to the high speed data cache in a manner that imposes minimal overhead to the normal input/output mechanism and minimizes the load placed on the device being cached is disclosed herein. Minimizing the load placed on the slower device and minimizing the overhead of processing input/output requests results in optimal performance.

Method for asynchronous population of data caches used with mass storage devices

A method for utilizing process identifiers to invalidate cached data is disclosed herein. The invention is a method for associating persistently stored data with an identifier of the process which created it, such that when the process that created the data is no longer present on the machine where the data is stored the data may be marked as invalid to prevent the use of 'stale' data.

Method for the use of process identifiers to invalidate cached data in environments that allow processes to migrate between physical machines

The present invention is a system and method for utilizing shadow/ghost list to prevent excessive wear on FLASH based cache devices. The method determines when data is highly likely to be accessed again, and avoids writes to a FLASH based caching device when data is unlikely to be accessed again through the use of 'shadow' or 'ghost' lists that are also used to perform adaptive caching.

Method for the use of shadow ghost lists to prevent excessive wear on FLASH based cache devices

A method to translate virtual storage device addresses to physical storage device addresses without the cooperation of the proprietary virtualization hypervisor is disclosed herein. The method of the present invention allows additional functionality to be added to the I/O processing of a closed/proprietary virtualization hypervisor by third party software or physical storage devices on the basis of individual virtual storage devices.

Growing community of inventors

San Diego, CA, United States of America

Thomas R Bolt