Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uflorida!gatech!hubcap!dfk
From: dfk@romeo.cs.duke.edu (David F. Kotz)
Newsgroups: comp.parallel
Subject: Very Large Data Sets - what are they?
Keywords: your experience -- parallel I/O
Message-ID: <4783@hubcap.UUCP>
Date: 15 Mar 89 13:26:27 GMT
Sender: fpst@hubcap.UUCP
Lines: 24
Approved: parallel@hubcap.clemson.edu

A number of you have or envision applications for computers that
involve large amounts of data. Perhaps these are databases, matrices,
images, VLSI circuit designs, etc.  My research involves filesystems
for parallel computers, and I am unsure what kinds and arrangements of
data might be used by parallel computers. 

I am interested in the arrangement of the data on disk, and how the
application reads it into memory. Does it read a lot or write a lot,
or both? Does it read and write the same file?  Does it read/write it
all at once, or throughout the run of the application?  Does it
read/write sequentially or randomly? How might you modify the
application for a parallel computer, and specifically, for parallel
I/O? 

Can I discuss this with you? Do you have some data that I can analyze
to determine, for example, what is the size of each row of the matrix,
or cell of the chip, etc? 

Thanks,
David Kotz
Department of Computer Science, Duke University, Durham, NC 27706
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