Datadirect Networks, Inc.

Micheal S Parkhurst

A system and method for data migration between data generating entities and de-clustered RAID storage employs a data re-distribution approach with the purpose of eliminating drives thrashing and attain an even I/O activity distribution for Physical Disk Extents (PDEs) residing on Physical Disks. The system monitors the I/O activity map, identifies competing over-used PDEs residing on the same physical disk drive, and if the drive thrashing is detected, re-directs 'write' or 'read' requests from the over-used PDEs to a different physical disk or to underused PDEs on the same physical disk.

System and method for data migration between high performance computing architectures and de-clustered RAID data storage system with automatic data redistribution

A data storage system employs a de-clustered RAID (DCR) organization with a Vertical Rotation approach to prevent overflow of cache buffers. The Vertical Rotation Controller limits the size of the I/O operation relative to a respective Physical Disk Extent (PDE) to the cache buffer, and writes/reads a computed parity stripe matching the size of the cache, to form chunk bundles in the PDEs. When a bundle is filled in a first PDE residing at a first row, a PDE residing at a second row vertically displaced from the first row is engaged for forming another bundle. The process continues until all PDEs in a Vertical Rotation Group (VRG) are filled, or continues to a next VRG vertically displaced from a previous one to end I/O requesting.

System and method for I/O optimized data migration between high performance computing entities and a data storage supported by a de-clustered raid (DCR)architecture with vertical execution of I/O commands

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Newbury Park, CA, United States of America

Micheal S Parkhurst