Emc IP Holding Company LLC

Sean Pollard

Alesia Tringale

Julie Zhivich

Jerome Cartmell

Storage node blades in a data storage system utilize queue pairs associated with point-to-point links to perform RDMA transactions with memory components associated with other storage node blades. Higher quality of service queue pairs are used for system message transactions and lower quality of service queue pairs are used for remote direct memory access data. Postings to a relatively higher priority queue pair are reduced when a corresponding relatively lower priority queue pair between the same pair of storage nodes via the same switch is starved of bandwidth. Postings to the relatively higher priority queue pair are increased when bandwidth starvation is remediated.

Automatic non-disruptive congestion control of a fabric in a data storage system

Individual transport connections within a dual-star fabric connected multi-node storage system are disabled in response to associated failures due to faulty hardware or temporal congestion. Each configured IB transport connection is monitored for viability and, upon failure, removed from the pool of available resource. Following failure restoration the resource is tested to ensure proper functionality and then restored to the pool of resources. Mappings associated with the transport connections are maintained while the connections are disabled.

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Methuen, MA, United States of America

Sean Pollard