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IPPS
2007
IEEE
13 years 11 months ago
Online Aggregation over Trees
Consider a distributed network with nodes arranged in a tree, and each node having a local value. We consider the problem of aggregating values (e.g., summing values) from all nod...
C. Greg Plaxton, Mitul Tiwari, Praveen Yalagandula
SIGMOD
2010
ACM
281views Database» more  SIGMOD 2010»
13 years 9 months ago
Continuous sampling for online aggregation over multiple queries
In this paper, we propose an online aggregation system called COSMOS (Continuous Sampling for Multiple queries in an Online aggregation System), to process multiple aggregate quer...
Sai Wu, Beng Chin Ooi, Kian-Lee Tan
SIGMOD
1997
ACM
180views Database» more  SIGMOD 1997»
13 years 9 months ago
Online Aggregation
Aggregation in traditional database systems is performed in batch mode: a query is submitted, the system processes a large volume of data over a long period of time, and, eventual...
Joseph M. Hellerstein, Peter J. Haas, Helen J. Wan...
WWW
2008
ACM
14 years 5 months ago
A new aggregation policy for RSS services
RSS is the XML-based format for syndication of Web contents, and users aggregate RSS feeds with RSS feed aggregators. There are RSS aggregation policies that help aggregate RSS fe...
Young Geun Han, Sang Ho Lee, Jae Hwi Kim, Yanggon ...
SIGMOD
2010
ACM
377views Database» more  SIGMOD 2010»
13 years 9 months ago
Online aggregation and continuous query support in MapReduce
MapReduce is a popular framework for data-intensive distributed computing of batch jobs. To simplify fault tolerance, the output of each MapReduce task and job is materialized to ...
Tyson Condie, Neil Conway, Peter Alvaro, Joseph M....