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				| <!-------- @HEADER
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|  !
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|  ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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|  !
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|  !  Zoltan Toolkit for Load-balancing, Partitioning, Ordering and Coloring
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|  !                  Copyright 2012 Sandia Corporation
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|  !
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|  ! Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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|  ! the U.S. Government retains certain rights in this software.
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|  ! Redistribution and use in source and binary forms, with or without
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|  ! modification, are permitted provided that the following conditions are
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|  ! met:
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|  !
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|  ! 1. Redistributions of source code must retain the above copyright
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|  ! 2. Redistributions in binary form must reproduce the above copyright
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|  ! contributors may be used to endorse or promote products derived from
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|  ! SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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|  ! Questions? Contact Karen Devine	kddevin@sandia.gov
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|  !                    Erik Boman	egboman@sandia.gov
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|  !
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|    <meta name="sandia.approved" content="SAND99-1376">
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|    <meta name="author" content="karen devine, kddevin@sandia.gov">
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|    <title> Zoltan Developer's Guide:  Philosophy</title>
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| 
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| </head>
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| <body bgcolor="#FFFFFF">
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| 
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| <div align=right><b><i><a href="dev.html">Zoltan Developer's Guide</a> 
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| |  <a href="dev_intro_coding.html">Next</a>  |  <a href="dev_intro.html">Previous</a></i></b></div>
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| 
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| <h2>
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| <a NAME="philosophy"></a>Philosophy of Zoltan</h2>
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| The Zoltan library is designed to be a general-purpose tool-kit
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| providing a variety of parallel data management services to a wide range
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| of scientific applications (see the <a href="../ug_html/ug.html">Zoltan
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| User's Guide</a>). To enable general use of the library, the library does
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| not directly access the data structures of an application. Instead, the
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| library obtains information it needs through
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| an object-oriented interface between Zoltan and the
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| application.
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| This interface uses call-back query functions to gather information. An
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| application developer must write and register these query functions before
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| using Zoltan. The intent, however, is that the number
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| and complexity of these query functions are low, allowing applications
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| to easily interface with the library. In addition, new algorithm
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| development would use the same query functions as previous algorithms,
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| enabling applications to use new algorithms without changes to the query
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| functions.
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| 
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| <p>In developing new algorithms for Zoltan, the developer
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| must write the code that calls the query functions to build the needed
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| data structures for the algorithm. However, the application need not change
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| its query functions. Thus, new algorithms can be added to the library and
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| used by an application with minimal effort on the part of the application
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| developer.
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| <p>
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| <hr WIDTH="100%">
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| <br>[<a href="dev.html">Table of Contents</a>  |  <a href="dev_intro_coding.html">Next: 
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| Coding Principles</a>  | <a href="dev_intro.html">Previous: 
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| Introduction</a>  |  <a href="https://www.sandia.gov/general/privacy-security/index.html">Privacy and Security</a>]
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| 
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