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PDB Frequently Asked Questions (FAQ)
Last-Modified: Wed Apr 3 13:52:53 PST 1996
Welcome to the FAQ for PDB!
INTRODUCTION
PDB is a small part of a much bigger effort called PACT. PACT is
the portable environment and toolkit that we use to create portable
applications, and to create functionality not readily available.
PACT is our environment of choice for handling unique data,
portable computing environments, and the distributed computing
arenas; and for converting data for the visualization application
or algorithm of choice. We have created PACT to shield ourselves
from new software, and hardware so we can concentrate on the
applications at hand. PACT is beginning to emphasize design that
takes advantage of massively parallel environments.
We would like to hear of your experiences with PACT. And, we would
be especially pleased to try to add your mathematical, graphical,
or other functionality to future distributions of PACT.
NOTICE
Absolute portability is our GOAL!
Most of the time we install PACT
without problems, the other times take varying amounts of effort to
track down. Usually the problems are simple, such as missing
headers. If your experience with PACT is not absolute portability,
we would like to hear from you so we can try to make it so. Please
direct all portability issues to:
sabrown@llnl.gov
or minner1@llnl.gov
Thanks to all who have contributed to this FAQ. Corrections and
contributions always welcome. Please e-mail comments, additions,
and corrections to:
rodrigues2@llnl.gov
and use SUBJECT: PDB FAQ
Items needing more input from you and others are marked with a ???.
----------------------------------------------------------------------
TABLE OF CONTENTS
----------------------------------------------------------------------
1) What is PDB?
2) What is PACT?
3) Where can I get the complete PDB source and documentation?
4) ???
----------------------------------------------------------------------
1) What is PDB?
PDB is a system for handling binary data in a portable way.
It can move data between files and memory and (with PPC) between
processes. In contrast to other systems which aim at FORTRAN
level functionality, PDB supports programmers in using natural
C idioms (this also covers FORTRAN as a subset).
a) Self-describing files
b) Efficient conversion scheme (not XDR based)
c) Uses C model for data typing and meaning
d) Supports user defined structures
e) Supports use of pointers in data trees
f) File variables can be appended to (indefinite dimension)
g) Partial reads and writes
h) Supports row major or column major ordering
i) Primitives support accessing other file types
2) What is PACT?
PACT stands for Portable Application Code Toolkit. It is a
self-contained set of tools which support developing and
using portable programs particularly scientific and engineering
applications. See the pact.FAQ
3) Where can I get the complete PDB source and documentation?
Since PDB is an intimate part of PACT, this will get the complete PACT including PDB. You may selectively install PDB.
Please use ftp to connect to:
west.llnl.gov
or
134.9.1.5
log in as anonymous, using your email address for the password,
cd pub/pact - to change directory,
binary - to set the transfer mode,
get the three pact files (yy_mm_dd indicates the date):
pact-unix.README
pactyy_mm_dd-doc.tar.gz
pactyy_mm_dd-src
The pact-unix.README file describes the PACT installation process.
4) ???
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