Guy King - Academia.edu (original) (raw)

Papers by Guy King

arXiv (Cornell University), Oct 11, 2021

All modern distributed systems list performance and scalability as their core strengths. Given th... more All modern distributed systems list performance and scalability as their core strengths. Given that optimal performance requires carefully selecting configuration options, and typical cluster sizes can range anywhere from 2 to 300 nodes, it is rare for any two clusters to be exactly the same. Validating the behavior and performance of distributed systems in this large configuration space is challenging without automation that stretches across the software stack. In this paper we present Fallout, an opensource distributed systems testing service that automatically provisions and configures distributed systems and clients, supports running a variety of workloads and benchmarks, and generates performance reports based on collected metrics for visual analysis. We have been running the Fallout service internally at DataStax for over 5 years and have recently open sourced it to support our work with Apache Cassandra, Pulsar, and other open source projects. We describe the architecture of Fallout along with the evolution of its design and the lessons we learned operating this service in a dynamic environment where teams work on different products and favor different benchmarking tools.

The purpose of this study is to examine the late Quaternary paleolake history of Butte Valley. Fi... more The purpose of this study is to examine the late Quaternary paleolake history of Butte Valley. Field work during August of 1 994 was undertaken at the request of the Archaeological Research Program of California State University, Chico which is conducting ongoing excavations at the Butte Valley Wildlife Area for the California Department of Fish and Game. No extensive study of Butte Valley Quaternary paleoenvironments had been done. Previous work on the paleoenvironments of the Butte Basin have been done as part of the geological surveys of Wood (1 960 ) and Williams (1949 ) who, respectively, briefly mention the Quaternary lacustrine and glacial deposits of the Basin.

In this study, National Weather Service temperature datasets are analyzed to determine the hottes... more In this study, National Weather Service temperature datasets are analyzed to determine the hottest and coldest places in California. Data problems include a lack of spatial coverage of weather stations, and inaccurate or missing observations. The hottest place in California overall is Death Valley, whose mean July temperature is well above that of any other station. But in mean yearly temperature and mean yearly maximum temperature, Death Valley is not significantly hotter than other stations in the Salton Sea, Mojave Desert, and along the Colorado River. Bodie measures out to be the coldest spot in California, but colder temperatures do occur on the un-instrumented highest peaks of the Sierra Nevada and White Mountains. California hot and cold spots are then compared to those of the conterminous United States as a whole. The lack of a comprehensive weather station network, temperature data inaccuracies, and stations with close temperature values are all major problems that make it ...

Double-swivel toggle mechanism releases large, heavy objects reliably. Double-swiveling action of... more Double-swivel toggle mechanism releases large, heavy objects reliably. Double-swiveling action of mechanism ensures it clears restraining pins upon release. Pins retain toggle and its load. If pin fails to withdraw at designated time for releasing payload, toggle swivels about its upper ball, and ring swivels about lower ball so ring flange clears failed pin. Double-swivel action ensures disengagement even it two pins fail to withdraw.

BenchCouncil Transactions on Benchmarks, Standards and Evaluations, 2021

Physical Geography, 1993

The Lahontan Basin of western Nevada was influenced by geomorphic changes in river channels that ... more The Lahontan Basin of western Nevada was influenced by geomorphic changes in river channels that produced interbasin diversions of surface drainage. Adrian Valley contains evidence of drainage diversion from the Walker River Basin to the Carson River Basin. Paleochannel evidence from both Adrian and Mason Valley, hydrological modeling, and Pleistocene shoreline evidence in the Walker Lake Basin indicate that: (1) the Adrian Valley is a Holocene abandoned channel of the Walker River, and (2) the valley was formed by lake overflow from the Walker subbasin of Pleistocene Lake Lahontan. A provisional six-stage history of Adrian Valley is presented. [Key words: geomorphology, Quaternary, Pleistocene Lake Lahontan, abandoned river channels, Great Basin.]

Yearbook of the Association of Pacific Coast Geographers, 2007

National Weather Service data published in USA Today are used to analyze daily hottest and coldes... more National Weather Service data published in USA Today are used to analyze daily hottest and coldest places in the lower 48 states. The dataset of national weather stations is restricted by population and elevation. Between 1995 and 2005, 264 places in the lower 48 states got the daily hottest record, while 364 places got the coldest record. Death Valley, California, had the highest number of hottest days (803). Stanley, Idaho, had the highest number of coldest days (398). The top coldest and hottest places were then climatically compared to other extreme weather stations in the conterminous United States using data compiled by the Midwest Regional Climate Center. The locations of hot and cold places vary considerably depending on what climate measure is used to determine mean temperatures. Death Valley has the highest mean July maximum temperature in the nation. If mean yearly maximum temperature is used, Death Valley ties with Lake Havasu City, Arizona, for being the hottest place. Key West, Florida, has the highest mean yearly temperature. For the coldest place in the conterminous United States, Darwin Ranch, Wyoming, gets the title if mean yearly minimum temperature is used. Tower, Minnesota, has the lowest mean January minimum temperature. Mount Washington, New Hampshire, has the lowest mean yearly temperature in the conterminous United States. The results of this study show that there is no single place in the conterminous United States that can claim to be the hottest or the coldest.

Yearbook of the Association of Pacific Coast Geographers, 1996

Adrian Pass is a dry valley that cuts across the present drainage divide separating the lower Car... more Adrian Pass is a dry valley that cuts across the present drainage divide separating the lower Carson and Walker River Basins. Previous studies of Adrian Pass have postulated that it is an abandoned channel of the Walker River. The evidence presented in this study suggests that Adrian Pass was formed by Quaternary lake overflow and was occupied by the Walker River for relatively brief periods. A landform chronology for Adrian Pass is developed using evidence that includes paleochannel deposits, comparison of the Post-Lake Lahontan history of Walker Lake with that of the Carson Desert, and Lake Lahontan shorelines in the Walker Basin. A historical analogue for Adrian Pass is Mud Lake Slough, which divides Pyramid Lake and Winnemucca Lake Basins. The Quaternary history of Adrian Pass, which has been affected by multiple events of both lake overflow discharge and river diversion, demonstrates how complex closed-basin hydrological changes can be through time.

20th NISSC Conference, paper

Abstract: Today many IT security professionals apparently believe that their discipline has three... more Abstract: Today many IT security professionals apparently believe that their discipline has three goals: confidentiality, integrity, and availability. After touching upon some doubts that this is so, this paper explores a different approach to the problem of IT security goals. ...