Timing-accurate Storage Emulation (CMU-CS-01-146)

Content Provider	Semantic Scholar
Author	Griffin, John Linwood Schindler, Jiri Schlosser, Steven W. Bucy, John S. Ganger, Gregory R.
Copyright Year	2002
Abstract	Timing-accurate storage emulation fills an important gap in the set of common performance evaluation techniques for proposed storage designs: it allows a researcher to experiment with not-yet-existing storage components in the context of real systems executing real applications. As its name suggests, a timing-accurate storage emulator appears to the system to be a real storage component with service times matching a simulation model of that component. This paper promotes timing-accurate storage emulation by describing its unique features, demonstrating its feasibility, and illustrating its value. A prototype, called the Memulator, is described and shown to produce service times within 2% of those computed by its component simulator for over 99% of requests. Two sets of measurements enabled by the Memulator illustrate its power: (1) application performance on a modern Linux system equipped with a MEMS-based storage device (no such device exists at this time), and (2) application performance on a modern Linux system equipped with a disk whose firmware has been modified (we have no access to firmware source code).
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Alternate Webpage(s)	http://repository.cmu.edu/cgi/viewcontent.cgi?article=1116&context=pdl
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article