Emc IP Holding Company LLC

Dell Products Inc.

Other

Michael P Wahl

Jian Gao

Xinlei Xu

Geng Han

Nickolay Alexandrovich Dalmatov

Vamsi K Vankamamidi

Jibing Dong

Lifeng Yang

Jamin Jianbin Kang

Philippe Armangau

Yubing Wang

Maher Kachmar

James H Shimer

Hongpo Gao

Yousheng Liu

Christopher Alan Seibel

Sheng Wang

Socheavy D Heng

Svetlana Kronrod

Wayne Li

Daniel B Lewis

James McCoy

Christopher Jones

Kenneth Charles Hill

Sun Ree

Stephen Henderson

Zhuoqun Yuan

Vibhash M Desai

Zhiyi Yang

A method, computer program product, and computing system for defining a plurality of IO processing queues within a storage system coupled to a storage platform, wherein the plurality of IO processing queues have differing priority levels; receiving one or more IO requests on the storage system coupled to the storage platform; assigning the one or more IO requests to one or more of the plurality of IO processing queues based, at least in part, upon a priority level of the one or more IO requests; and servicing the plurality of IO processing queues in a distributed fashion.

System and method using IOPS to service priority queues in a distributed manner

A method, computer program product, and computing system for receiving one or more IO requests on a storage system coupled to a cloud-based storage platform, wherein the cloud-based storage platform has a defined maximum IOPS rate; determining a current level of utilization of the defined maximum IOPS rate; and determining whether to queue the one or more IO requests for an aggregated write operation to the cloud-based storage platform based, at least in part, upon the current level of utilization of the defined maximum IOPS rate.

Storage management system and method

A method, computer program product, and computing system for allocating a first number of tokens from a plurality of tokens for processing read IO requests from a read IO queue, thus defining a number of allocated read tokens. A second number of tokens may be allocated from the plurality of tokens for processing write IO requests from a write IO queue, thus defining a number of allocated write tokens. It may be determined that the processing of the write IO requests is throttled. In response to determining that the processing of the write IO requests from the write IO queue is throttled, a maximum allowable number of write tokens may be defined. Additional tokens may be allocated for processing the read IO requests from the read IO queue based upon, at least in part, the maximum allowable number of write tokens and the number of allocated write tokens.

System and method for allocating storage system resources during write throttling

A method, computer program product, and computing system for receiving, at a storage system, a command from a host. A command type of the command may be determined. It may be determined if a threshold associated with the command type has been met. In response to determining that the threshold associated with the command type has been met, a command queue full response may be sent, from the storage system, to the host.

System and method for selectively throttling commands within a storage system

A method, computer program product, and computing system for defining a token pool size for a storage system token pool associated with a storage system. An input/output (IO) processing load for the storage system may be determined. The token pool size for the storage system token pool associated with the storage system may be dynamically adjusted based upon, at least in part, one or more changes in the IO processing load determined for the storage system.

System and method for dynamically adjusting priority-based allocation of storage system resources

A method, computer program product, and computing system for compartmentalizing a plurality of RAID extents, within a RAID system, into a plurality of rotation subgroups. An IO overload condition is sensed in at least one drive extent associated with a first rotation subgroup, chosen from the plurality of rotation subgroups. Instructions are provided concerning moving at least a portion of a load experienced by the first rotation subgroup to a second rotation subgroup, chosen from the plurality of rotation subgroups.

Bottom-up IO load balancing storage system and method

A method, computer program product, and computing system for compartmentalizing a plurality of RAID extents, within a RAID system, into a plurality of rotation subgroups. A first logical data portion is written to a first rotation subgroup chosen from the plurality of rotation subgroups. A wear imbalance condition is sensed in a first rotation subgroup, chosen from the plurality of rotation subgroups, that is associated with a plurality of logical data portions.

Storage system and method for movement between rotation subgroups

A method, computer program product, and computing system for compartmentalizing a plurality of RAID extents, within a RAID system, into a plurality of rotation subgroups. An IO load imbalance condition is sensed in a first rotation subgroup, chosen from the plurality of rotation subgroups, that is associated with a plurality of logical data portions. At least one of the plurality of logical data portions is moved from the first rotation subgroup to a second rotation subgroup, chosen from the plurality of rotation subgroups.

Top-down IO load balancing storage system and method

A method, computer program product, and computing system for compartmentalizing a plurality of RAID extents, within a RAID system, into a plurality of rotation subgroups. A write load imbalance condition is sensed in a first rotation subgroup, chosen from the plurality of rotation subgroups, that is associated with a plurality of logical data portions. At least one of the plurality of logical data portions is moved from the first rotation subgroup to a second rotation subgroup, chosen from the plurality of rotation subgroups.

Top-down wear-leveling storage system and method

A method, computer program product, and computing system for managing wear balance in a mapped RAID storage system. According to embodiments, mapped RAID extents, which are comprised of storage disk extents, are assigned to particular mapped RAID groups based on one or more parameters related to wear experienced by disk extents associated with the RAID extent. Endurance parameters are measured and can be used by machine learning modules to predict future wear levels enabling predictive wear balancing in mapped RAID storage systems. Embodiments can be used when initially forming a mapped RAID group, when adding storage to an existing mapped RAID group, or when managing the ongoing performance of a mapped RAID group or storage system.

Managing wear balancing in mapped RAID storage systems

A method, computer program product, and computer system for receiving, by a computing device, one or more drives added to an extent pool of storage devices. An empty Mapped RAID group may be generated. A plurality of extents in the extent pool may be shuffled. A RAID extent may be mapped to the empty Mapped RAID group, wherein the RAID extent is mapped to the empty Mapped RAID group while shuffling the plurality of extents in the extent pool.

System and method for creating mapped RAID group during expansion of extent pool

A method, computer program product, and computer system for receiving, by a computing device, an I/O request. The I/O request may be processed as a write miss I/O. One or more dirty pages associated with the write miss I/O may be placed into a tree according to a key. It may be determined whether one of a first event and a second event occurs. A data flush may be triggered for the tree when the first event occurs, and the data flush may be triggered for the data flush for the tree when the second event occurs.

Flush strategy for using DRAM as cache media system and method

Technology within a mapped RAID (Redundant Array of Independent Disks) data storage system for avoiding wasted capacity in a hybrid array of data storage drives. Drives from a set of new drives may be added to an original partnership group of drives such that the number of highest capacity drives in the original partnership group remains or is made to be at least as large as a minimum number of drives required to provide RAID data protection. Drives may also be added to the original partnership group such that the number of highest capacity drives in a newly created partnership group is also at least as large as the minimum number of drives required to provide RAID data protection. The minimum required number of drives may be equal to or greater than the total number of drive extents indicated by each RAID extent in a RAID mapping table.

Assignment of newly added data storage drives to an original data storage drive partnership group and a new data storage drive partnership group in a mapped RAID (redundant array of independent disks) system

A method, computer program product, and computer system for receiving, by a computing device, a write I/O to a storage device array coupled to a cache, wherein the write I/O may be received from a host. A cache miss in the cache may be determined for the write I/O. One or more free pages may be allocated at an address in the cache to store data for the write I/O. The address in the cache to store the data may be sent to a hostside portion of a software stack in the storage device array. The data may be written directly from the hostside portion to the cache at the address.

Storage device array integration of dual-port NVMe device with DRAM cache and hostside portion of software stack system and method

Load balancing in a mapped RAID data storage system that moves slices of logical unit (LUN) address space between non-volatile storage represented by different rotation groups of RAID extent entries in a RAID extent table. The RAID extent table is divided into RAID extent groups corresponding to partnership groups of drives, and the RAID extent groups are divided into rotation groups. At least one LUN with an address space made up of slices is generated for each RAID extent group. Host data directed to each slice is stored in drive extents indicated by the RAID extent entries in the rotation group to which the slice is mapped. A rebalancing operation modifies the mapping between slices in a LUN and the rotation groups in the corresponding RAID extent group such that at least one slice is remapped from a heavily loaded rotation group to a lightly loaded rotation group.

Load balancing of I/O by moving logical unit (LUN) slices between non-volatile storage represented by different rotation groups of RAID (Redundant Array of Independent Disks) extent entries in a RAID extent table of a mapped RAID data storage system

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Bulverde, TX, United States of America

Michael P Wahl