Sandisk Technologies Inc.

Netapp, Inc.

Dhananjoy Das

Nisha D Talagala

Swaminathan Sundararaman

David Flynn

Jingpei Yang

Ashish Batwara

Nick Piggin

Ned Plasson

Torben Mathiasen

A method for enforcing data integrity in an RDMA data storage system includes flushing data write requests to a data storage device before sending an acknowledgment that the data write requests have been executed. An RDMA data storage system includes a node configured to flush data write requests to a data storage device before sending an acknowledgment that a data write request has been executed.

Interconnect delivery process

Apparatuses, systems, methods, and computer program products are disclosed for transaction log acceleration. A log module is configured to determine transaction log records indicating a sequence of operations performed on data. A commit module is configured to send transaction log records to one or more volatile memory pages accessible over a network. Volatile memory pages are configured to ensure persistence of transaction log records. A storage module is configured to send transaction log records to a non-volatile storage device in response to an acknowledgment that one or more volatile memory pages store the transaction log records.

Transaction log acceleration

An aggregation module combines a plurality of logical address spaces to form a conglomerated address space. The logical address spaces comprising the conglomerated address space may correspond to different respective storage modules and/or storage devices. An atomic aggregation module coordinates atomic storage operations within the conglomerated address space, and which span multiple storage modules. The aggregation module may identify the storage modules used to implement the atomic storage request, assign a sequence indicator to the atomic storage request, and issue atomic storage requests (sub-requests) to the storage modules. The storage modules may be configured to store a completion tag comprising the sequence indicator upon completing the sub-requests issued thereto. The aggregation module may identify incomplete atomic storage requests based on the completion information stored on the storage modules.

Systems and methods for distributed atomic storage operations

A compression manager generates a reduced-size data set for a page. The reduced-size data set is stored on a storage medium by a storage module, and unused portions of the page are identified and/or recorded by the storage module. The reduced-size data set may be generated by compressing the page. The reduced-size data set may be written in response to a request from a client, which provides a message that identifies the unused portion(s) of the page. The page may be stored in a file, and the unused portion may correspond to empty portion(s) within the file. The storage module may maintain an index to map the page to the reduced-size data set, such that portions of the page are unmapped. The storage capacity used by the page may correspond to the mapped portion of the page, and exclude portion(s) of the page that are unmapped.

Systems and methods for managing storage compression operations

Techniques are disclosed relating to reclaiming data on recording media. In one embodiment, an apparatus has a solid-state memory array including a plurality of blocks. The solid-state memory array may implement a cache for one or more storage devices. Respective operational effects are determined relating to reclaiming ones of the plurality of blocks. One of the plurality of blocks is selected as a candidate for reclamation based on the determined operational effects, and the selected block is reclaimed. In some embodiments, the determined operational effects for a given block indicate a number of write operations to be performed to reclaim the given block. In some embodiments, operational effects are determined based on criteria relating to assigned quality-of-service levels. In some embodiments, operational effects are determined based on information relating to virtual storage units.

Growing community of inventors

Sunnyvale, CA, United States of America

Dhananjoy Das