Pure Storage, Inc.

Peter E Kirkpatrick

Gordon James Coleman

Andrew R Bernat

Ronald S Karr

John Colgrove

Hari Kannan

Roland Dreier

Wei Tang

Robert H Lee

Yuhong Mao

Yijie Zhao

Neil A Vachharajani

Boris Feigin

Benjamin Scholbrock

David J Baik

John Roper

William Cerreta

Eric Kelly Blanchard

Naveen Neelakantam

Constantine P Sapuntzakis

Igor Ostrovsky

Timothy W Brennan

Neil Buda Vachharajani

Ashish Karkare

Anthony Niven

Shuyi Shao

Ethan L Miller

Ying Gao

Mark L McAuliffe

Aswin Karumbunathan

Radek Aster

Eric D Seppanen

Logan Jennings

Zoltan DeWitt

Yanwei Jiang

Daniel Sladic

Tsu-Hao Chang

HuiHui Cheng

Gunjan Dang

Michael Goldsby

Junming Zhu

Phil Hord

Caleb Gum

A determination as to whether a workload of storage system operations to be performed by a storage system is below a threshold is made. In response to determining that the workload of the storage system operations is below the threshold, a first set of authorities is migrated from a first set of storage nodes of the storage system to a second set of storage nodes of the storage system. One or more processing devices previously executing the first set of authorities on the first set of storage nodes are in a reduced power mode.

Storage system with dynamic data management functions

A storage system is provided. The storage system includes a plurality of storage nodes configured to provide storage services for the storage system. A respective storage node comprises a processing device, a memory, network interfaces, and a plurality of device interfaces supporting hot-pluggable managed flash storage devices. A respective managed flash storage device comprises flash memory and a storage device controller supporting a set of commands for the respective storage node to access and optimize use of the flash memory for use in the storage system, wherein at least a subset of the managed flash storage devices further comprise memory and energy storage for staging writes, and for storing metadata for the storage system.

Data storage system with managed flash

Reading data stored at a free block of a storage device is read prior to allocating the free block for storage of data. A determination as to whether a number of bit flips of the data stored at the free block is below a threshold is made. The free block is added to a pool of active free blocks to be allocated for the storage of data upon determining that the number of bit flips of the data stored at the free block is below the threshold.

Data block allocation for storage system

Preserving data in a storage system operating in a reduced power mode, including: detecting that the storage system should enter the reduced power mode; and entering the reduced power mode, including performing, while in the reduced power mode, one or more maintenance operations on one or more storage devices in the storage system.

Preserving data in a storage system operating in a reduced power mode

A command to relocate data from a first set of data blocks at the plurality of storage devices to a second set of data blocks while bypassing the storage controller is transmitted by the storage controller. The command includes address information associated with the second set of blocks to store the relocated data.

Optimized read request processing for relocated data

A read request with a high priority indication is received. A determination as to whether an in progress flash programming operation would delay processing the read request for a threshold amount of time is made. In response to determining that the in progress flash programming operation delays processing the read request for the threshold amount of time, the in progress flash programming operation is interrupted.

Latency reduction of flash-based devices using programming interrupts

A method for page writes for triple or higher level cell flash memory is provided. The method includes receiving data in a storage system, from a client that is agnostic of page write requirements for triple or higher level cell flash memory, wherein the page write requirements specify an amount of data and a sequence of writing data for a set of pages to assure read data coherency for the set of pages. The method includes accumulating the received data, in random-access memory (RAM) in the storage system to satisfy the page write requirements for the triple or higher level cell flash memory in the storage system. The method includes writing at least a portion of the accumulated data in accordance with the page write requirements, from the RAM to the triple level cell, or the higher level cell, flash memory in the storage system as an atomic write.

Page write requirements for a distributed storage system

A system with storage memory and a processing device has a logical deletion to physical erasure time bound. The system dereferences data, responsive to a direction to delete the data. The system monitors physical blocks in storage memory for live data and the dereferenced data. The system cooperates garbage collection with monitoring the physical blocks, so that at least a physical block having the dereferenced data is garbage collected and erased within a logical deletion to physical erasure time bound.

Guaranteeing physical deletion of data in a storage system

Enabling communication between multiple storage controllers and a single-ported storage device, including determining, by an arbiter, that a first storage system controller of a plurality of storage system controllers has gained exclusive access to a single-ported storage device having a plurality of lanes; and in response to the determination, enabling communication between the first storage system controller and the storage device; and preventing communication between the storage device and at least one other storage system controller of the plurality of storage system controllers.

Providing access to a single-ported storage device

Writing data in a storage system that includes a first type of storage device and a second type of storage device, including: selecting, for one or more unprocessed write requests, a target storage device type from the first type of storage device and the second type of storage device; issuing a first group of write requests to the first type of storage device, the first group of write requests addressed to one or more locations selected in dependence upon an expected address translation to be performed by the first type of storage device; and issuing a second group of write requests to the second type of storage device, the second group of write requests addressed to one or more locations selected in dependence upon a layout of memory in the second type of storage device.

Targeted i/o to storage devices based on device type

A method includes, responsive to receiving a modified first reservation command from a storage controller, identifying, by a storage drive, a first range of storage based on a first range identifier of the modified reservation command. The method also includes granting, by the storage drive, a reservation for access to the storage drive on behalf of a first host controller by associating the reservation for the first range with a second range of storage.

Intelligent storage protocol modification of a distributed storage system

One or more performance parameters associated with data stored at a storage device of a plurality of storage devices are received by a storage controller. A first number of blocks of the storage device to a high resiliency portion and a second number of blocks of the storage device to a low resiliency portion of the storage device are allocated based on the one or more performance parameters.

Resiliency management in a storage system

A storage system is provided. The storage system includes a plurality of non-volatile memory modules and a storage system controller. One or more non-volatile memory modules include a multiplane die. A processing device of the storage system controller is configured to determine that a number of planes of the multiplane die used simultaneously for accessing data should be changed. In response to determining that the number of planes the multiplane die used simultaneously for accessing data should be changed, the processing device is configured to move one or more portions from an existing erase block to a new erase block, the existing erase block being a different size than the new erase block.

Dynamic plane selection in data storage system

Characteristics associated with a device are received from the device. Firmware for the device is generated based on the received characteristics.

Optimizing storage system performance using data characteristics

A storage array controller may receive data to be programmed to a solid-state storage device of a plurality of solid-state storage devices. The storage array controller may identify a type of the data and determine whether to program the data to a low latency portion of the solid-state storage device based on the type of the data. In response to determining to program the data to the low latency portion of the solid-state storage device, the storage array controller may program the data to the low latency portion of the solid-state storage device.

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Mountain View, CA, United States of America

Peter E Kirkpatrick