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Moving objects index workload generator source code, version 1.1
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The high-level description of the generator, its parameters, and the
workloads that it generates can be found in the "Performance
Experiments" section of a TimeCenter TR-44 "Indexing the Positions of
Continuously Moving Objects."
(http://www.cs.auc.dk/research/DP/tdb/TimeCenter/TimeCenterPublications/TR-44.ps.gz)

The generator can be compiled using the provided make file. It
compiles with GNU C++.

A sample generator parameters file test.prm is provided (more
parameter files used in experiments described in the technical report
can be found in prm/ subdirectory). Comments are provided in test.prm
describing individual parameters.

Start the generator by typing:

./generate test.prm   

or 

./generate -t test.prm

In both cases test.sql is output. In the first case the output is a
binary file, in the second - a readable text file. In addition,
test.dat is output if Load parameter in test.prm is set to 1. test.dat
is a binary file containing data for bulk-loading of an index. The
file consists of a number of records which have a format: record_id
(four-byte integer), followed by spatial coordinates and velocity
vector coordinates (all four-byte floats). If Load parameter is set to
0, the initial index data is generated as a series of insert
operations at the beginning of test.sql.

The .sql file contains commands to the index:

t intvalue 
   Changes the current time to intvalue 
a         
   Advances the time by 1
i (x[, y[, z]], vx[, vy[, vz]]), integer_key
   Inserts a point (1, 2, or 3D) into the index (position at time 0, velocity vector)
d (x[, y[, z]], vx[, vy[, vz]]), integer_key
   Deletes a point from the index  
s &(x1[, y1[, z1]], x2[, y2[, z2]], t1, t2[, vx[, vy[, vz]]])
   Performs a rectangular query (which is a moving, if a velocity vector is specified)

Comments and bug reports are welcome and should be sent to
[e-mail]

Copyright (c) 1999-2001, Aalborg University