The Measuroscope is used to measure the lateral distance between two features on a substrate. The system uses video edge detection to reduce operator error by removing judgment inconsistencies. Resolution depends on magnification of objective and type of detection selected. Minimum resolution is 100 nm for 100x objective and video edge detection.
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This paper will discuss the difficulties and methods involved in debugging the Linux kernel on huge clusters. Intermittent errors that occur once every few years are hard to debug and become a real problem when running across thousands of machines simultaneously. The more we scale clusters, the more reliability becomes critical. Many of the normal debugging luxuries like a serial console or physical access are unavailable. Instead, we need a new strategy for addressing thorny intermittent race conditions. This paper presents the case for a new set of tools that are critical to solve these problems and also very useful in a broader context. It then presents the design for one such tool created from a hybrid of a Google internal tool and the open source LTTng project. Real world case studies are included.
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