Pure Storage, Inc.

Joern W Engel

Naveen Neelakantam

John Colgrove

Ethan L Miller

Christopher Golden

Ronald S Karr

Neil A Vachharajani

Alan Stuart Driscoll

Yuhong Mao

Kiron Vijayasankar

Aswin Karumbunathan

Richard V Tran

Yanwei Jiang

Bo Feng

Xiyan Liu

Abhinav Chakravarty

A method, apparatus, and computer program product for tier-specific data compression, comprising comparing costs associated with a plurality of storage configurations for storing data based on one or more usage characteristics of data, wherein each storage configuration of the plurality of storage configurations corresponds to a particular storage tier of a plurality of storage tiers and a particular compression algorithm of a plurality of compression algorithms and based on the comparison of the costs, storing the data using a storage configuration of the plurality of storage configurations.

Tier-specific data compression

Utilizing different data compression algorithms based on characteristics of a storage system, including: selecting, in dependence upon a priority for conserving processing resources or storage resources in a storage system, a data compression algorithm to utilize to compress data; detecting that at least one of an amount of processing resources available in the storage system or the amount of space available to store additional data in the storage system has changed; and responsive to detecting that at least one of the amount of processing resources available in the storage system or the amount of space available to store additional data in the storage system has changed, selecting a different data compression algorithm to utilize to compress data.

Utilizing different data compression algorithms based on characteristics of a storage system

A plurality of data blocks stored at a plurality of solid-state storage devices are identified. A portion of data is read from each data block of the plurality of data blocks. A corresponding property is determined for each data block of the plurality of data blocks based on reading the portion of the data. A set of data blocks from the plurality of data blocks is identified, wherein each data block of the set of data blocks is associated with a first corresponding property. The set of data blocks is stored at a data segment.

Efficient data compression by grouping similar data within a data segment

Compressing data in dependence upon characteristics of a storage system, including: receiving an amount of processing resources available in the storage system; receiving an amount of space available in the storage system; and selecting, in dependence upon the priority for conserving the amount of processing resources and the amount of space, a data compression algorithm to utilize to compress the data.

Optimizing data compression in a storage system

A storage system performs garbage collection with data compression. A storage controller in the storage system determines a garbage collection directive by evaluating the amount of reclaimable space relative to a target amount of reclaimable space. Garbage collection is performed using data compression tunable to compression aggressiveness according to the garbage collection directive.

Using a PID controller to opportunistically compress more data during garbage collection

Compressing data in dependence upon characteristics of a storage system

Systems, apparatuses, methods, and computer-readable storage mediums for performing lease-based fencing using a time-limited lease window. During the time-limited lease window, writes to a shared storage medium are permitted, while writes are denied for expired leases. When a successful heartbeat is generated for a primary storage controller, the lease window is extended for the primary storage controller from the time of a previous heartbeat. Accordingly, a prolonged stall between successive heartbeats by the primary storage controller will result in the newly extended lease being expired at the time it is granted. This scheme prevents a split brain scenario from occurring when a secondary storage controller takes over as the new primary storage controller in response to detecting the stall.

Distributed management of a storage system

Access control in a flash storage system

Growing community of inventors

Mountain View, CA, United States of America

Joern W Engel