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A capacity planning methodology

J. C. Cooper
1980 IBM Systems Journal  
If the workload is a programming installation that has enough terminals and capacity, the peaks and valleys may be pronounced.  ...  The results of a study are useful for planning IBM SYST J ¢ VOL 19 @ NO 1 @ 1980 COOPER Figure 3 On-line demand versus capacity for prime shift NEW TOTAL CAPACITY CPU HOURS PER MONTH TOTAL CAPACITY NEW  ... 
doi:10.1147/sj.191.0028 fatcat:f3zi7lcutfezfburmfpyjps5pm

Processor, I/O path, and DASD configuration capacity

J. B. Major
1981 IBM Systems Journal  
A simple ex- tension to handle these requirements is now presented. A 303i MVS installation undertakes a capacity planning study based on USAGE.’  ...  Given a multiple processor installation with a combined workload and N (<5) processors with M factors of M,, M,, M,, M,, and M, in decreasing order, the overall workload processing capacity is the inner  ... 
doi:10.1147/sj.201.0063 fatcat:2cs3wzp755cm5nqt2hl56yjt2u

Using Queuing Models for Large System Migration Scenarios – An Industrial Case Study with IBM System z [chapter]

Robert Vaupel, Qais Noorshams, Samuel Kounev, Ralf Reussner
2013 Lecture Notes in Computer Science  
Then, we present a real-world industrial case study and show how the performance models can be used. The migration is planned for a System z environment running a large scale banking application.  ...  In this paper, we present a real-world case study to demonstrate that a queuing model-based approach can be effectively used to predict performance impact when migrating to a new environment in an industrial  ...  RE 1674/5-1 and KO 3445/6-1. Using Queuing Models for Large System Migration Scenarios  ... 
doi:10.1007/978-3-642-40725-3_20 fatcat:bizxzrlqmvhr3meoywgwbbeosm

Knowledge management in a decentralized global financial services provider: a case study with Allianz Group

Marcus Spies, Andrew J Clayton, Masoud Noormohammadian
2005 Knowledge Management Research & Practice  
Here, we report the setup and the results from a pilot study.  ...  The aim was to evaluate the implications of different search and retrieval tools on workflow within a representative everyday business environment.  ...  Acknowledgements We thank Mr Tobias Talirsch and Mr Sebastian Ströhl for their engaged support in preparing and evaluating the empirical study. Mrs M.  ... 
doi:10.1057/palgrave.kmrp.8500046 fatcat:asgs6vpagbea3at3did4hxntxy

Conflict Propagation Within Large Technology and Software Engineering Programmes: A Multi-Partner Enterprise System Implementation as Case Study

Richard A. Williams
2019 IEEE Access  
Using social network analysis and thematic coding analysis, within a single case study, new insights are provided into the development of conflict within and between individual project teams of large technology  ...  Finally, we argue that high-conflict organizations, such as the temporary multi-partner implementation team that forms to deliver large technology and software programmes, have a tendency to contain competing  ...  We then discuss the development and propagation of conflict within a case study that represents a large multi-partner technology and software engineering programme.  ... 
doi:10.1109/access.2019.2953952 fatcat:mf3h7ohmwbahnnn5wp2v3s4bfy

A performance model of MVS

Willy W. Chiu-We, Min Chow
1978 IBM Systems Journal  
The purpose of the case study is to demonstrate applications of modeling techniques to real-world problems such as capacity planning and system tuning.  ...  Capacity planning Capacity planning is a key step of computer resources manage- ment.  ... 
doi:10.1147/sj.174.0444 fatcat:vux3skvmhve2tkxr3fh732kswe

Modeling considerations for predicting performance of CICS/VS systems

P. H. Seaman
1980 IBM Systems Journal  
Model simplicity versus useful accuracy In a capacity planning environment, where there is a large amount of uncertainty in predicting future requirements, a system model of the foregoing type entails  ...  A final example illustrating the choice of model detail consistent with the end use of capacity planning is the representation of a batch workload within the CICS model.  ... 
doi:10.1147/sj.191.0068 fatcat:ag33dom43jakngbc7yhkl5wjga

Page 46 of Computer Performance Vol. 4, Issue 1 [page]

1983 Computer Performance  
Since this maximum is not known a priori, some amount of trial and error is necessary to find a relatively small number of clusters that give an accurate description of the data, in this case the workload  ...  The aim of the cluster analysis was to characterize a typical peak hour of the workload.  ... 

I/O subsystem configurations for ESA: New roles for processor storage

B. McNutt
1993 IBM Systems Journal  
A case study, based on data collected at a large Multiple Virtual Storage installation, is used to investigate the potential types and amounts of memory use by individual files, both in storage control  ...  The installation examined in the case study was a large MVS/ESA environment running primarily on- line database applications.  ... 
doi:10.1147/sj.322.0252 fatcat:xijnxayckzc4xmdr3iombhdsuq

Dominant factors for energy choice decisions by households in Tanzania: A case study of selected villages in Mvomero District

Felichesmi Selestine Lyakurwa, Eliaza Mkuna
2019 African Journal of Science Technology Innovation and Development  
The technological advancement in telecommunications, engineering and agriculture has made electricity access a key factor for the development of any region in the world.  ...  The African continent has remained largely undeveloped because the electrification rates are low especially in Sub-Saharan African and the lack of electricity access is most acute in the rural and peri-urban  ...  This study will utilize a combination of exploratory and case study research designs. It concerns EAC and will utilise selected one-stop-borderposts as case studies.  ... 
doi:10.1080/20421338.2018.1550929 fatcat:sqdkth37tbcllillqrwkyymxqy

A metric for predicting the performance of an application under a growing workload

E. J. Weyuker, A. Avritzer
2002 IBM Systems Journal  
Known as the PNL (Performance Nonscalability Likelihood) metric, it is applied to a study of a large industrial system, and used to predict at what workloads bottlenecks are likely to appear when the presented  ...  The case study also outlines our performance testing approach and presents the major steps required to identify current production usage and to assess the software performance under current and future  ...  We also include a case study using a newly developed software system for a large customer care service provider.  ... 
doi:10.1147/sj.411.0045 fatcat:hxrzumnhinbj3ao2m7nnyp62cm

A genetic algorithm for workload scheduling in cloud based e-learning

Octavian Morariu, Cristina Morariu, Theodor Borangiu
2012 Proceedings of the 2nd International Workshop on Cloud Computing Platforms - CloudCP '12  
Cloud computing is a game-changing paradigm in modern computing, offering a better utilization of IT resources and at the same time reducing the operational costs and increasing the elasticity of the IT  ...  These private clouds have limited resources in terms of processing power and IO capability and therefore, an effective scheduling of workloads becomes very important.  ...  We are interested in obtaining a uniform distribution for planned scheduling requests, in order to be able to accept a large amount of one-off requests at any time.  ... 
doi:10.1145/2168697.2168702 fatcat:fbgvegqrbnb55nmye7pbs3leaq

Considerations on the insularity of performance evaluation

Domenico Ferrari
1986 Performance Evaluation Review  
Its positive and negative effects on computer science and technology, as well as on performance evaluation itself, are discussed.  ...  Thus, the author proposes instructional and research initiatives to foster the rapid integration of the performance evaluation viewpoint into the main stream of computer science and engineering.  ...  In particular, reliable capacity planning (i.e., the determination of the predicted time in the future when the capacity of an installation will become insufficient, and of the most cost effective way  ... 
doi:10.1145/15827.15829 fatcat:nz77pg2r4vdkpbqktutdvidgnu

Considerations on the insularity of performance evaluation

Domenico Ferrari
1986 IEEE Transactions on Software Engineering  
Its positive and negative effects on computer science and technology, as well as on performance evaluation itself, are discussed.  ...  Thus, the author proposes instructional and research initiatives to foster the rapid integration of the performance evaluation viewpoint into the main stream of computer science and engineering.  ...  In particular, reliable capacity planning (i.e., the determination of the predicted time in the future when the capacity of an installation will become insufficient, and of the most cost effective way  ... 
doi:10.1109/tse.1986.6312965 fatcat:ctf5j3lxzbbzdbia5rqhziw6jy

Experimental and numerical analysis for potential heat reuse in liquid cooled data centres

Andreu Carbó, Eduard Oró, Jaume Salom, Mauro Canuto, Mario Macías, Jordi Guitart
2016 Energy Conversion and Management  
This model is able to predict the behaviour of 23 liquid cooling data centres and can be used to study the potential compatibility between large 24 data centres with different heat reuse applications.  ...  To evaluate the potential of 16 heat reuse a unique liquid cooled data centre test bench was designed and built. An extensive 17 thermal characterization under different scenarios was performed.  ...  inputs at a given time). 396 397 In the current study four different IT load scenarios are under study: Scenario a) Data centre 398 dedicated totally to HPC workload.  ... 
doi:10.1016/j.enconman.2016.01.003 fatcat:uyxy2gjkpjeapcpjkjko7co2se
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