International Business Machines Corporation

William Garrett Verdoorn, Jr

Andrew Dale Walls

Michael T Benhase

Michael John Palmer

Thomas Anthony Gregg

David F Craddock

Carl Evan Jones

Yu-Cheng Hsu

Phillip G Williams

Timothy Carl Bronson

Bruce Leroy Beukema

Michael Howard Hartung

Ronald Edward Fuhs

Glenn David Gilda

Anthony J Bybell

Stefan P Jackowski

Jerry D Dixon

Gerald U Merckel

Robert H Farrell

Peter B Bandy

Jack D Neely

Stephen A Schmitt

Systems, methods and computer program products for automatically triggering operations on a queue pair (QP). Methods include receiving a command at a remote direct memory access (RDMA) capable adapter. A trigger event element associated with the command is determined. The trigger event element is posted on a triggered QP. A triggeror element on a triggeror QP is posted, where the triggeror QP includes a reference to the triggered QP. A notification that the triggeror element has completed is received. The trigger event element is automatically initiated in response to receiving the notification.

Systems, methods and computer program products for automatically triggering operations on a queue pair

Provided is a system comprising a first node comprising a plurality of processor cards each including a processor fabric, wherein the processor cards in the first node connect via their processor fabrics; a second node comprising a plurality of processor cards each including a processor fabric, wherein the processor cards in the second node connect via their processor fabrics; and a plurality of communication interfaces, wherein each interface connects one processor card in the second node to one processor card in the first node to enable communication between the connected processor cards to coordinate processor operations between the connected processor cards in the first and second nodes.

Multi-node configuration of processor cards connected via processor fabrics

An apparatus, system, and method are disclosed for mandatory end to end integrity checking. The apparatus includes a compatibility module configured to monitor data from a source and verify integrity information compatibility with a standard, and an integrity module configured to wrap the data from the source with additional integrity information. The system includes a source configured to send data over a network, a target configured to receive data over the network, the apparatus, a main memory module, a storage controller, and a storage device. The method includes monitoring data from a source, verifying integrity information compatibility with a standard, and wrapping the data from the source with additional integrity information.

Apparatus, system, and method for mandatory end to end integrity checking in a storage system

A method for maintaining data is provided that includes receiving primary data at a first node, receiving mirrored data from a second and third node at the first node, and mirroring data received at the first node to a second and third node.

Method for providing a triad copy of storage data

An apparatus, system, and method are disclosed for data error checking and recovery in a data storage device. A redundancy check module creates a redundancy check for data on a data storage device in a SCSI End-to-End Checking Standard environment and a redundancy check storage module stores the redundancy check in a guard associated with the data.

Apparatus, system, and method for error checking and recovery of transmitted data in a SCSI environment

Dynamic routing of data to multiple processor complexes. PCI address space is subdivided among a plurality of processor complexes. Translation table entries at each processor complex determine which processor complex is to receive a DMA transfer, thereby enabling routing of DMA data to one I/O hub node while accessing translation table entries at another I/O hub node. Further, interrupt requests may be dynamically routed to multiple processor complexes.

System and method for supporting access to multiple I/O hub nodes in a host bridge

An array controller implemented method and apparatus are provided for dynamically expanding a redundant array of independent disk drives (RAID) by adding any number M of direct access storage devices (DASDs) to the original array while maintaining data availability and system performance to an array user. A logical to physical address map (LPAM) of original array (LPAM-O) and of expanded array (LPAM-E) and initial array state information are established and stored. A selected domain of data blocks is defined for deferred access to an array user. Then the selected domain of data blocks is read using LPAM-O. Parity information is calculated with the read data of the selected domain of data blocks. Then the read selected domain of data blocks and the calculated parity information are written to the expanded array using LPAM-E. Updated array state information is stored responsive to the selected domain of data blocks and the calculated parity information being written and the last defined selected domain of data blocks for deferred access to an array user is undefined. A next selected domain of data blocks for deferred access to an array user is defined and read using LPAM-O. The sequential machine operations of calculating parity information, writing the selected domain of parity and data blocks, storing updated array state information, undefining the last defined selected domain of data blocks and defining a next selected domain of data blocks are repeated until all data blocks of the original array have been written to the expanded array.

Method and apparatus for dynamically expanding a redundant array of disk

A method and apparatus for performing data base searches in which the host processor and main memory are free for other processing tasks between the time that the host processor requests the search until the search results are reported back to the host processor. To commence the search, an input/output controller communicates from the host processor to a record scan circuit values of a skip length, a key length and a data length. While data records are received serially from disk files, within each data record, a length of data equal to the specified skip length is initially skipped. Following this, a search argument is compared with a length of data specified by the key length value. This comparison operation is alternated with skipping of data specified by the data length value until the end of the record is reached or until a specified number of comparisons has taken place. The data record is stored as it is received from the files. If a successful comparison is found within a data record, either the entire data record or a specified portion thereof can be read back through the controller to the host processor.

Growing community of inventors

Rochester, MN, United States of America

William Garrett Verdoorn, Jr