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SpanDB: A Fast, Cost-Effective LSM-tree Based KV Store on ...
paction, where SST files selected from a level L i are read and merged with SSTs of overlapping key ranges at level L i+1, withinvalidKV pairs removed. The formeris triggeredby the number of immutable MemTables reaching a limit, and the latter by a level becoming full. Both operations create large, sequential I/O, whose impact on foreground ...
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UC San Diego On the effectiveness of mitigations …
www.usenix.orgOn the effectiveness of mitigations against floating-point timing channels David Kohlbrenner Hovav Shacham UC San Diego How effective are?
Strangely Enough It All Turns Out Well - usenix.org
www.usenix.org• Venture Capital 101 and Building the Business • End Game – Acquisition Angst – and Assimilation • Working for Corporate America • Things I will do differently next time …. A Brief History of Softway Systems • The Mission: build an environment to allow UNIX apps to be
F Reload: A High Resolution, Low Noise, L3 Cache Side ...
www.usenix.orgFlush+Reload: A High Resolution, Low Noise, L3 Cache Side-Channel Attack ... FLUSH +RELOAD: a High Resolution, Low Noise, L3 Cache Side-Channel Attack Yuval Yarom Katrina Falkner The University of Adelaide Abstract Sharing memory pages between non-trusting processes is a common method of reducing the memory footprint of multi-tenanted systems ...
Identifying Trends in Enterprise Data Protection Systems
www.usenix.orgIdentifying Trends in Enterprise Data Protection Systems George Amvrosiadis Dept. of Computer Science, University of Toronto ... Understanding com- ... ratios Deduplication can result in the reduction of backup image sizes by more than 88%,
Estimating Unseen Deduplication— from Theory to Practice
www.usenix.orgment depends on the data itself and on the storage media that it resides on. The technique is based ... deduplication and data reduction in general, makes more sense than ever. Combined with the popularity of modern ... Understanding the estimation accuracy. The proofs of accuracy of the Unseen algorithm are the-
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www.usenix.orgArchitecture and Implementation R. A. P. of Guide, an Object-Oriented Distributed System Balter, J. Bernadat, D. Decouchant, A. Duda, Freyssinet, S. Krakowiak, M ...
Fear the Reaper: Characterization and Fast Detection of ...
www.usenix.orgFear the Reaper: Characterization and Fast Detection of Card Skimmers Nolen Scaife University of Florida scaife@ufl.edu Christian Peeters University of Florida
Under New Management: Practical Attacks on SNMPv3
www.usenix.orgdone via SNMP, the serial port, or a web interface. Of these options, only SNMP allows for scalable configura-tion management accross a diverse group of devices. For example, a managed LAN switch can be configured with features such as port specific Quality of Service (QoS)
File Systems Fated for Senescence? Nonsense, Says Science!
www.usenix.organd file system design that could substantially affect ag-ing. For example, a back-of-the-envelope analysis sug-gests that aging should get worse as rotating disks get
Core Job Descriptions - USENIX
www.usenix.org4 / Core Job Descriptions n Ability to identify/locate shared resources and perform simple tasks (e.g., manipulate jobs in a print queue, figure out why a network file system isn’t available) n Works well alone or on a team Required Background n Two years of college …
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Chapter 7. Chips, Sawdust, Planer Shavings, Bark, and Hog Fuel
www.ruraltech.orgpaction is the compaction ratio (CR), which is CR = Vp (loose) / Vp (compacted) = 15 ft3 / 12 ft3 = 1.25. CR = E (loose) / E (compacted) = 3.00 / 2.40 = 1.25. CR can also be calculated from the relative solid volumes. It has a value of one for loose residue and increases as the particles become more compacted.
WiscKey: Separating Keys from Values in SSD-conscious Storage
www.usenix.orgpaction (i.e., merge sorting) also happens for on-disk components, when each C i reaches its size limit. Note that compactions are only performed between adjacent levels (C i and C i+1), and they can be executed asyn-chronously in the background. To serve a lookup operation, LSM-trees may need to search multiple components. Note that C0 ...
Radishes: A new cover crop option - USDA
www.nrcs.usda.govpaction and improve soil tilth. After the cover crop dies in the winter and its roots decompose, the remaining root channels are used by the growing roots of following crops to penetrate compacted deep soil layers. In Maryland research, four times as many corn roots penetrated compact subsoil after a forage radish cover crop