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1. Scalable I/O-Aware Job Scheduling for Burst Buffer Enabled HPC Clusters 2016

   https://ncsu.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwhZ1RT8IwEMcvBl98QpFEREkffB10W9ttj7iAYGIgEZ5J13bxAcQgxK_vXRmIiYkvy5ZszXbd9r9re78DeBAYYqRZmAZSGwxQEi2CVDseZC62xsQGJdn8Hsw5wqLtEptZ-Rl8UzGqu6Zc0WxphGFcHHq4dsypSEM_fzmOppBQoTT5zC3JY1RFkRyATtWxrMA-uNejtqJMdKs2SZnMCn_Ka_ysTuRlWIf5IUnHryqhWgany-t7HmnoORYn-Mb_H-ISmj8JfWx6lKorOHPvDagfKjqw6gO_hqdX7DJKpmLj3iTof-mNY8_rAk94w_ugzHWGTi573KHPiFuqrcIGPvvKstE0Z_lyR-CFzybMh4NZPgqqUguBRu1SAcbIEnvGRjLS6KMo7bRzpSzTxFmrtFJl5iSRc4xwRSo5tzw06L2ZREeW6A83wFykQ5soUdoSrZ9wXarI8cyGhSxEYbIWNNAsi489RWNRmaIFbbL6AgWfqLWGlveYLUYkcRYLefvnNW24QL9F7Sfx76C23ezcPdSoVzr-vejA-WQ2mY2_AQECs6w

   Herbein, Stephen; Ahn, Dong; Lipari, Don; Scogland, Thomas; Stearman, Marc...

   Proceedings Of The 25th Acm International Symposium On High Performance Parallel And Distributed Computing, pp. 69 - 80.

   The economics of flash vs. disk storage is driving HPC centers to incorporate faster solid-state burst buffers into the storage hierarchy in exchange for smaller parallel file system (PFS) bandwidt... Read more

   The economics of flash vs. disk storage is driving HPC centers to incorporate faster solid-state burst buffers into the storage hierarchy in exchange for smaller parallel file system (PFS) bandwidth. In systems with an underprovisioned PFS, avoiding I/O contention at the PFS level will become crucial to achieving high computational efficiency. In this paper, we propose novel batch job scheduling techniques that reduce such contention by integrating I/O awareness into scheduling policies such as EASY backfilling. We model the available bandwidth of links between each level of the storage hierarchy (i.e., burst buffers, I/O network, and PFS), and our I/O-aware schedulers use this model to avoid contention at any level in the hierarchy. We integrate our approach into Flux, a next-generation resource and job management framework, and evaluate the effectiveness and computational costs of our I/O-aware scheduling. Our results show that by reducing I/O contention for underprovisioned PFSes, our solution reduces job performance variability by up to 33% and decreases I/O-related utilization losses by up to 21%, which ultimately increases the amount of science performed by scientific workloads. Read less

   Conference Proceeding  |  Full Text Online

2. THE TIMELESS BOEING 75 2017

   https://ncsu.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwpV07T8MwED7RdoGlPMUzChIDS9Q4dWJnQk2UkCCgFDKgLpXjOBstr_5_fHmo7QQSy0mWLNvyWXe683ffAVxRHWJwn3DLFVIHKExQiwtlW74aFlIOpXbJcjOZU6MJsRam0W9rFitbXSwkpskHSEXGPc49evP-YWHjKPxgbbpodKBHsMwU0XtksvpIIDVlqg7XLc5dvmlyncaPxH14a09QwUewacE6jn5QcRdWhBUtT-O_TrsL_ZZA2hzVT2QPttR8H3bWeAgP4ChLIjNLH6J7rQ4zGEfp463J3EO4jqMsTKx255l-FJjpF3O1WH7NVnsPj8FUjiAF82hZlIQyZovSc5TtFyR3c5pL_wQuf13n9A9zzmDbQadXIbDOofv9uVQX0MU7NKDDnicoXwMDeqPgLoz1KIhCPUrCNJ4ald5QOmOU7EXLJ3f6A8xWp3c

   Tarrant, W M

   Aviation History, Vol. 28, Issue 1.

   MORE THAN EIGHT DECADES AFTER ITS INTRODUCTION, THE CLASSIC STEARMAN CONTINUES TO THRILL PILOTS LOOKING FOR OPEN-COCKPIT ADVENTURE BY W.M. TARRANT THE BOEING MODEL 7S "STEARMAN" WAS THE MOST PROLIF... Read more

   MORE THAN EIGHT DECADES AFTER ITS INTRODUCTION, THE CLASSIC STEARMAN CONTINUES TO THRILL PILOTS LOOKING FOR OPEN-COCKPIT ADVENTURE BY W.M. TARRANT THE BOEING MODEL 7S "STEARMAN" WAS THE MOST PROLIFIC PRIMARY TRAINING AIRCRAFT OF WORLD WAR II AND THE UNITED STATES' MOST PRODUCED BIPLANE. When the company reorganized as the Swallow Aircraft Company, Stearman became chief engineer and Walter Beech was the test pilot. In October 1927, Stearman Aircraft relocated to Wichita, and in 1929, along with a dozen other aviation companies, became part of United Aircraft and Transportation Corporation (UATC), which was owned by William Boeing. With the stock market collapse and onset of the Great Depression in October 1929, Stearman looked to the military market, specifically to airman training, in order to stay in business. In 1933 Stearman chief engineer Mac Short, along with engineers Howard Zipp and Jack Clark, designed the Stearman Model 70, an open-cockpit biplane trainer based on Lloyd Stearman's Model 6. Evaluated by both the Army and the Navy, the airplane exhibited stall characteristics that were considered too tame for cadet training, plus it could not meet the Navy spin and recovery requirement: a one-turn recovery after a 10-turn spin. [...]stall strips, or more accurately spin strips-small triangular strips of wood on the wing leading edge-were added. The Navy designation for the Model 73 production version was NS-1. Since the Navy had excess WrightJ-5 Whiriwind engines in its inventory, they powered the NS-1 rather than the Model 70's Lycoming R-680. The PT-27 was intended... Read less

   Magazine Article  |  Full Text Online

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