17,441 Hits in 9.9 sec

Making a cost-effective video server

Y.N. Doganata, A.N. Tantawi
1994 IEEE Multimedia  
In the short run, some video files or movies are frequently demanded in the morning, while others are in high demand during the evening.  ...  Hence, performance management techniques play an important role in the design of such a server.  ...  Here, v is the video stream rate to the output and y is the speed of each tape drive in Mbps.  ... 
doi:10.1109/93.338684 fatcat:r62q5htazfconbdyesdhpkmegy

Run-time performance optimization and job management in a data protection solution

Ludmila Cherkasova, Roger Lau, Harald Burose, Subramaniam Venkata Kalambur, Bernhard Kappler, Kuttiraja Veeranan
2011 12th IFIP/IEEE International Symposium on Integrated Network Management (IM 2011) and Workshops  
data Protector, backup management, job scheduling, performance evaluation, automated parameter tuning The amount of stored data in enterprise Data Centers quadruples every 18 months.  ...  Our goal is to design a backup schedule that minimizes the overall completion time for a given set of backup jobs.  ...  Acknowledgments: The authors are grateful to Xiaozhou Li for pointing out Graham's and Remy's papers [14] , [21] and related discussions.  ... 
doi:10.1109/inm.2011.5990675 dblp:conf/im/CherkasovaLBKKV11 fatcat:baklcx2mlvg2hooxoyoqkmmkqi

DP+IP = design of efficient backup scheduling

Ludmila Cherkasova, Alex Zhang, Xiaozhou Li
2010 2010 International Conference on Network and Service Management  
Our goal is to automate the design of a backup schedule that minimizes the overall completion time for a given set of backup jobs.  ...  Our goal is to automate the design of a backup schedule that minimizes the overall completion time for a given set of backup jobs.  ...  Acknowledgements: The authors are grateful to Roger Lau for providing access to monitoring data of the backup servers.  ... 
doi:10.1109/cnsm.2010.5691322 dblp:conf/cnsm/CherkasovaZL10 fatcat:bzpcfytlwzaz7g7ozfl54jvajy

Grid data access on widely distributed worker nodes using scalla and SRM

P Jakl, J Lauret, A Hanushevsky, A Shoshani, A Sim, J Gu
2008 Journal of Physics, Conference Series  
Manager) components designed for space management and will compare the solution with the standard Scalla approach in use in STAR for the past 2 years.  ...  We will present an overview of the largest deployment of Scalla (Structured Cluster Architecture for Low Latency Access) in the world spanning over 1000 CPUs co-sharing the 350 TB Storage Elements and  ...  The picture 3 shows two most important key parameters of tape drive performance size of the file and number of files restored per one tape mount.  ... 
doi:10.1088/1742-6596/119/7/072019 fatcat:tt7mn6gfvbgpdkstn7d3u24c7a

The JINR Tier1 Site Simulation for Research and Development Purposes

V. Korenkov, A. Nechaevskiy, G. Ososkov, D. Pryahina, V. Trofimov, A. Uzhinskiy, N. Voytishin, Gh. Adam, J. Buša, M. Hnatič
2016 EPJ Web of Conferences  
The simulation of some processes of the Tier1 site is considered as an example of our application approach.  ...  Even with the substantial efforts invested in the design phase to understand the systems configuration, it would be hard enough to develop a system without additional research of its future evolution.  ...  The tape robot moves a cartridge to the drive, the cartridge file system is mounted to the drive and the file is copied to the disk.  ... 
doi:10.1051/epjconf/201610802033 fatcat:c6ev7lvzaze4hba4zys4mpsj2y

Page 909 of IEEE Transactions on Computers Vol. 52, Issue 7 [page]

2003 IEEE Transactions on Computers  
The tertiary storage system has many removable storage media such as optical disks or tapes and N ” number of drives, where NV, typically ranges from 1 to 16.  ...  Since the design of the system involves multiple parameters pertaining to storage and bandwidth, we have used analysis to facilitate the process.  ... 

Performance Evaluation and Scalability of IP-based and Heuristic-based Job Scheduling Algorithm Backup Systems

Mahmoudreza Tahmassebpour
2016 Indian Journal of Science and Technology  
Background/Objectives: One of the most important factors in the design of enterprise computer networks is data storage method.  ...  As well as, the algorithm can simulate the analysis of a backup system will help. The proposed approach significantly increases the performance, reliability and quality of implemented solutions.  ...  Each tape drive has a configuration parameter that can be a concurrency level, for example, the number of simultaneous disk agents, which can backup of different several objects in parallel to the tape  ... 
doi:10.17485/ijst/2016/v9i26/97260 fatcat:6fv34wpnazfmbhiaxeydiion6u

Page 20 of Hewlett-Packard Journal Vol. 34, Issue 5 [page]

1983 Hewlett-Packard Journal  
This produced a drive system mod- ule that can be removed from the 82161A and designed into other products with a minimum of change, electrical or mechanical.  ...  The selection of a hub-driven cassette was the key step in a ‘“‘simplicity’’ approach to the design of the 82161A an Headframe oe Ribbon y Cable / Magnetic Head Cassette ~~ Positioning Post 20 HEWLETT-PACKARD  ... 

Optimizing QoS, performance, and power efficiency of backup services

Ludmila Cherkasova, Alex Zhang
2015 2015 Sustainable Internet and ICT for Sustainability (SustainIT)  
Our goal is to automate the design of a backup schedule that minimizes the overall completion time for a given set of backup jobs.  ...  In this work, we compare the outcome of the integer programming formulation with a heuristic-based job scheduling algorithm, called FlexLBF.  ...  Each tape drive has a configuration parameter which defines a 1 HP Data Protector provides the integration with Virtual Tape Libraries (VTL) by emulating the drives of a physical tape library while storing  ... 
doi:10.1109/sustainit.2015.7101359 dblp:conf/ifip6-3/CherkasovaZ15 fatcat:rngg73w4wvgtjiywrtfv7f6rhu

LTO: A better format for mid-range tape

G. A. Jaquette
2003 IBM Journal of Research and Development  
Tape drives designed to the LTO Ultrium ᭨ format were the first of the super drives to be shipped to mid-range tape customers.  ...  This paper describes some of the eclectic features designed into the LTO format.  ...  Some LTO features had never been seen in a tape drive, some only in isolated instances of tape drives that are no longer existent, and some only in helical tape drives.  ... 
doi:10.1147/rd.474.0429 fatcat:vk3odqkv5fgtrcsor475lj7adu

Enhancing and optimizing a data protection solution

L. Cherkasova, R. Lau, H. Burose, B. Kappler
2009 2009 IEEE International Symposium on Modeling, Analysis & Simulation of Computer and Telecommunication Systems  
In this work, we use a historic information about the object backup processing time and suggest an additional job scheduling, and automated parameter tuning which may significantly optimize the overall  ...  In this work, we use a historic information about the object backup processing time and suggest an additional job scheduling, and automated parameter tuning which may significantly optimize the overall  ...  Acknowledgments: The authors are grateful for useful comments, suggestions, and discussions provided by our HPL colleagues Joe Tucek, Alistair Veitch, Craig Soules.  ... 
doi:10.1109/mascot.2009.5367043 dblp:conf/mascots/CherkasovaLBK09 fatcat:u6563bvmlrb3nfyrhmdmm44qm4

Design and Implementation of a Network Aware Object-based Tape Device

Dingshan He, Nagapramod Mandagere, David Du
2007 24th IEEE Conference on Mass Storage Systems and Technologies (MSST 2007)  
Our results for the intelligent buffering mechanism show that our scheme adapts better to mismatches in network and tape drive bandwidths.  ...  In this work we propose a few extensions to the OSD standard in order to facilitate easier integration of tape devices into the object storage ecosystem.  ...  This clearly shows that the tape drive is working in streaming mode.  ... 
doi:10.1109/msst.2007.4367970 fatcat:l4buvxtd3rds3mmhmv72ohcspu

Architecture, Implementation, and Deployment of a High Performance, High Capacity Resilient Mass Storage Server (RMSS)

Terry Jones, Beata Sarnowska, Frank Lovato, David Magee, John Kothe
2001 Mass Storage Systems and Technologies(MSS), Proceedings of the NASA Goddard Conference on  
This paper discusses the technologies and considerations used in the design of the MSRC Resilient Mass Storage Server (RMSS), its architecture, implementation and integration, deployment and transition  ...  The resultant configuration utilizes two SUN Enterprise 10000s (E10K) with 3 TB of switched Fibre Channel Disk Arrays and the latest generation of tape devices.  ...  Acknowledgements Many were involved who contributed to the success of this project. In particular, the ASC MSRC began implementation of the RMSS Cluster concept early and uncovered many issues.  ... 
doi:10.1109/mss.2001.10014 dblp:conf/mss/JonesSLMK01 fatcat:i4kj6fhtpja5znfhxw2h4fcn3e

A Very High Bit Rate Image Data Recorder

Dave Bancroft
2002 SMPTE Motion Imaging Journal  
Deferred loading of capture server from data tape recorder. con- its This is possi- ble because the tape drive was designed to have a correct- ed bit error rate (BER) of 1 in 10-11, a big improvement over  ...  In the two-part SMPTE D-6 standard, the function- ality of the tape drive is represented in the “records” or “tape footprint” document, which defines the loca- tions and patterns of the tracks on tape.  ... 
doi:10.5594/j16344 fatcat:ach26m7325clbimfodwjnx32qq

Use of Heat Transfer Enhancement Techniques in the Design of Heat Exchangers [chapter]

Martín Picón-Núñez, Jorge C. Melo-González, Jorge Luis García-Castillo
2018 Advances in Heat Exchangers [Working Title]  
In the flow of a clean fluid through the tube of a heat exchanger, the boundary layer theorem establishes that a laminar sublayer exists where the fluid velocity is minimal.  ...  A second option is the engineering of new surfaces which cause increased local turbulence, and the third option consists in the use of mechanical inserts that promote local turbulence.  ...  Their construction with characteristics that facilitate the increase of surface area and their versatility in terms of the materials of construction are some of the reason why in some applications they  ... 
doi:10.5772/intechopen.78953 fatcat:xp646wmr5fcphbm4ohwrmp6noe
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