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VDT - Visual Disk Test : performs I/O tests on files, partitions, and/or disks with visual feedback/follow-up, offering flexible test area selection by size, location, percent, or combinations thereof, plus test duration control by time or size.
Xdd is a command-line based tool for measuring and characterizing disk subsystem I/O on single systems and clusters of systems. It is designed to provide consistent and reproducible performance measurements of disk I/O traffic. This repo has 6.2a which is really old an obsolete.
The name XDD is trademarked and belongs to
I/O Performance, Inc. (http://www.ioperformance.com/)
See the github account of the fine folks at ORNL for a more recent version (https://github.com/ORNL/xdd). It...
grabmem -- allocates, initialises, and immediately frees a block of memory.
Useful for forcing the OS to flush disk cache and page out programs, if a large amount of free physical memory is needed.