2016 - T1 - WS1 - Distributed computation and communication theme

Collection 2016 - T1 - WS1 - Distributed computation and communication theme

Organizer(s) Gács, Péter ; Körner, János ; Schulman, Leonard

Date(s) 01/02/2016 - 12/02/2016

linked URL https://web.archive.org/web/20221228152145/http://iss.bu.edu/bobak/csnexus//distcomp.html

00:00:00 / 00:00:00

12 42

Communication Cost in Parallel Query Processing

We consider the following problem: what is the amount of communication required to compute a query in parallel on p servers, over a large database instance? We define the Massively Parallel Communication (MPC) model, where the computation proceeds in rounds consisting of local computations followed by a global reshuffling of the data. Servers have unlimited computational power and are allowed to exchange any data, the only cost parameters are the number of rounds and the maximum amount of communication per server. I will describe tight bounds on the amount of communication for the case of single round algorithms on non-skewed data, and discuss some partial results for multiple rounds and for skewed data.

Information about the video

Date of recording 04/02/2016
Date of publication 25/02/2016
Institution IHP
Licence CC BY-NC-ND
Language English
Format MP4

Domain(s)

Computer Science

MSC codes

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