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» Optimizing Queries on Files
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WOSP
2004
ACM
15 years 7 months ago
Application performance on the Direct Access File System
The Direct Access File System (DAFS) is a distributed file system built on top of direct-access transports (DAT). Direct-access transports are characterized by using remote direct...
Alexandra Fedorova, Margo I. Seltzer, Kostas Magou...
IPPS
2007
IEEE
15 years 7 months ago
Online Grid Replication Optimizers to Improve System Reliability
In a data intensive Grid system, many data replica schemes and models have been proposed to improve the system response time or data consistency, but little attention has been pai...
Ming Lei, Susan V. Vrbsky, Zijie Qi
VLDB
2004
ACM
102views Database» more  VLDB 2004»
15 years 6 months ago
PIVOT and UNPIVOT: Optimization and Execution Strategies in an RDBMS
PIVOT and UNPIVOT, two operators on tabular data that exchange rows and columns, enable data transformations useful in data modeling, data analysis, and data presentation. They ca...
Conor Cunningham, Goetz Graefe, César A. Ga...
PE
2006
Springer
130views Optimization» more  PE 2006»
15 years 1 months ago
Analysis of resource transfers in peer-to-peer file sharing applications using fluid models
This paper proposes a stochastic fluid flow model to compute the transfer time distribution of resources in peer-to-peer file sharing applications. The amount of bytes transferred...
Rossano Gaeta, Marco Gribaudo, Daniele Manini, Mat...
PVLDB
2008
136views more  PVLDB 2008»
15 years 29 days ago
Keyword query cleaning
Unlike traditional database queries, keyword queries do not adhere to predefined syntax and are often dirty with irrelevant words from natural languages. This makes accurate and e...
Ken Q. Pu, Xiaohui Yu