<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html xmlns:fn="http://www.w3.org/2005/02/xpath-functions"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <link rel="stylesheet" href="../../../../doc/otp_doc.css" type="text/css"> <title>Erlang -- Mnesia User's Guide</title> </head> <body bgcolor="white" text="#000000" link="#0000ff" vlink="#ff00ff" alink="#ff0000"><div id="container"> <script id="js" type="text/javascript" language="JavaScript" src="../../../../doc/js/flipmenu/flipmenu.js"></script><script id="js2" type="text/javascript" src="../../../../doc/js/erlresolvelinks.js"></script><script language="JavaScript" type="text/javascript"> <!-- function getWinHeight() { var myHeight = 0; if( typeof( window.innerHeight ) == 'number' ) { //Non-IE myHeight = window.innerHeight; } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) { //IE 6+ in 'standards compliant mode' myHeight = document.documentElement.clientHeight; } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) { //IE 4 compatible myHeight = document.body.clientHeight; } return myHeight; } function setscrollpos() { var objf=document.getElementById('loadscrollpos'); document.getElementById("leftnav").scrollTop = objf.offsetTop - getWinHeight()/2; } function addEvent(obj, evType, fn){ if (obj.addEventListener){ obj.addEventListener(evType, fn, true); return true; } else if (obj.attachEvent){ var r = obj.attachEvent("on"+evType, fn); return r; } else { return false; } } addEvent(window, 'load', setscrollpos); //--></script><div id="leftnav"><div class="innertube"> <img alt="Erlang logo" src="../../../../doc/erlang-logo.png"><br><small><a href="users_guide.html">User's Guide</a><br><a href="index.html">Reference Manual</a><br><a href="release_notes.html">Release Notes</a><br><a href="../pdf/mnesia-4.4.19.pdf">PDF</a><br><a href="../../../../doc/index.html">Top</a></small><p><strong>Mnesia</strong><br><strong>User's Guide</strong><br><small>Version 4.4.19</small></p> <br><a href="javascript:openAllFlips()">Expand All</a><br><a href="javascript:closeAllFlips()">Contract All</a><p><small><strong>Chapters</strong></small></p> <ul class="flipMenu" imagepath="../../../../doc/js/flipmenu"> <li id="no" title="Introduction" expanded="false">Introduction<ul> <li><a href="Mnesia_chap1.html"> Top of chapter </a></li> <li title="About Mnesia"><a href="Mnesia_chap1.html#id338110">About Mnesia</a></li> <li title="The Mnesia DataBase Management System (DBMS)"><a href="Mnesia_chap1.html#id341285">The Mnesia DataBase Management System (DBMS)</a></li> </ul> </li> <li id="no" title="Getting Started with Mnesia" expanded="false">Getting Started with Mnesia<ul> <li><a href="Mnesia_chap2.html"> Top of chapter </a></li> <li title="Starting Mnesia for the first time"><a href="Mnesia_chap2.html#id338984">Starting Mnesia for the first time</a></li> <li title="An Introductory Example"><a href="Mnesia_chap2.html#id344715">An Introductory Example</a></li> </ul> </li> <li id="no" title="Building A Mnesia Database" expanded="false">Building A Mnesia Database<ul> <li><a href="Mnesia_chap3.html"> Top of chapter </a></li> <li title="Defining a Schema"><a href="Mnesia_chap3.html#id348711">Defining a Schema</a></li> <li title="The Data Model"><a href="Mnesia_chap3.html#id348967">The Data Model</a></li> <li title="Starting Mnesia"><a href="Mnesia_chap3.html#id349022">Starting Mnesia</a></li> <li title="Creating New Tables"><a href="Mnesia_chap3.html#id352698">Creating New Tables</a></li> </ul> </li> <li id="no" title="Transactions and Other Access Contexts" expanded="false">Transactions and Other Access Contexts<ul> <li><a href="Mnesia_chap4.html"> Top of chapter </a></li> <li title="Transaction Properties"><a href="Mnesia_chap4.html#id353259">Transaction Properties</a></li> <li title="Locking"><a href="Mnesia_chap4.html#id353472">Locking</a></li> <li title="Dirty Operations"><a href="Mnesia_chap4.html#id353932">Dirty Operations</a></li> <li title="Record Names versus Table Names"><a href="Mnesia_chap4.html#id354305">Record Names versus Table Names</a></li> <li title="Activity Concept and Various Access Contexts"><a href="Mnesia_chap4.html#id354394">Activity Concept and Various Access Contexts</a></li> <li title="Nested transactions"><a href="Mnesia_chap4.html#id354683">Nested transactions</a></li> <li title="Pattern Matching"><a href="Mnesia_chap4.html#id354756">Pattern Matching</a></li> <li title="Iteration"><a href="Mnesia_chap4.html#id355102">Iteration</a></li> </ul> </li> <li id="no" title="Miscellaneous Mnesia Features" expanded="false">Miscellaneous Mnesia Features<ul> <li><a href="Mnesia_chap5.html"> Top of chapter </a></li> <li title="Indexing"><a href="Mnesia_chap5.html#id355446">Indexing</a></li> <li title="Distribution and Fault Tolerance"><a href="Mnesia_chap5.html#id355565">Distribution and Fault Tolerance</a></li> <li title="Table Fragmentation"><a href="Mnesia_chap5.html#id355714">Table Fragmentation</a></li> <li title="Local Content Tables"><a href="Mnesia_chap5.html#id356657">Local Content Tables</a></li> <li title="Disc-less Nodes"><a href="Mnesia_chap5.html#id356684">Disc-less Nodes</a></li> <li title="More Schema Management"><a href="Mnesia_chap5.html#id356842">More Schema Management</a></li> <li title="Mnesia Event Handling"><a href="Mnesia_chap5.html#id356957">Mnesia Event Handling</a></li> <li title="Debugging Mnesia Applications"><a href="Mnesia_chap5.html#id357532">Debugging Mnesia Applications</a></li> <li title="Concurrent Processes in Mnesia"><a href="Mnesia_chap5.html#id357677">Concurrent Processes in Mnesia</a></li> <li title="Prototyping"><a href="Mnesia_chap5.html#id357714">Prototyping</a></li> <li title="Object Based Programming with Mnesia"><a href="Mnesia_chap5.html#id357828">Object Based Programming with Mnesia</a></li> </ul> </li> <li id="no" title="Mnesia System Information" expanded="false">Mnesia System Information<ul> <li><a href="Mnesia_chap7.html"> Top of chapter </a></li> <li title="Database Configuration Data"><a href="Mnesia_chap7.html#id358063">Database Configuration Data</a></li> <li title="Core Dumps"><a href="Mnesia_chap7.html#id358101">Core Dumps</a></li> <li title="Dumping Tables"><a href="Mnesia_chap7.html#id358122">Dumping Tables</a></li> <li title="Checkpoints"><a href="Mnesia_chap7.html#id358157">Checkpoints</a></li> <li title="Files"><a href="Mnesia_chap7.html#id358397">Files</a></li> <li title="Loading of Tables at Start-up"><a href="Mnesia_chap7.html#id358758">Loading of Tables at Start-up</a></li> <li title="Recovery from Communication Failure"><a href="Mnesia_chap7.html#id358916">Recovery from Communication Failure</a></li> <li title="Recovery of Transactions"><a href="Mnesia_chap7.html#id359039">Recovery of Transactions</a></li> <li title="Backup, Fallback, and Disaster Recovery"><a href="Mnesia_chap7.html#id359160">Backup, Fallback, and Disaster Recovery</a></li> </ul> </li> <li id="no" title="Combining Mnesia with SNMP" expanded="false">Combining Mnesia with SNMP<ul> <li><a href="Mnesia_chap8.html"> Top of chapter </a></li> <li title="Combining Mnesia and SNMP "><a href="Mnesia_chap8.html#id359978">Combining Mnesia and SNMP </a></li> </ul> </li> <li id="no" title="Appendix A: Mnesia Error Messages" expanded="false">Appendix A: Mnesia Error Messages<ul> <li><a href="Mnesia_App_A.html"> Top of chapter </a></li> <li title="Errors in Mnesia"><a href="Mnesia_App_A.html#id360122">Errors in Mnesia</a></li> </ul> </li> <li id="no" title="Appendix B: The Backup Call Back Interface" expanded="false">Appendix B: The Backup Call Back Interface<ul> <li><a href="Mnesia_App_B.html"> Top of chapter </a></li> <li title="mnesia_backup callback behavior"><a href="Mnesia_App_B.html#id360342">mnesia_backup callback behavior</a></li> </ul> </li> <li id="no" title="Appendix C: The Activity Access Call Back Interface" expanded="false">Appendix C: The Activity Access Call Back Interface<ul> <li><a href="Mnesia_App_C.html"> Top of chapter </a></li> <li title="mnesia_access callback behavior"><a href="Mnesia_App_C.html#id360464">mnesia_access callback behavior</a></li> </ul> </li> <li id="no" title="Appendix D: The Fragmented Table Hashing Call Back Interface" expanded="false">Appendix D: The Fragmented Table Hashing Call Back Interface<ul> <li><a href="Mnesia_App_D.html"> Top of chapter </a></li> <li title="mnesia_frag_hash callback behavior"><a href="Mnesia_App_D.html#id360610">mnesia_frag_hash callback behavior</a></li> </ul> </li> </ul> </div></div> <div id="content"> <div class="innertube"> <div class="frontpage"></div> <center><h1>Mnesia User's Guide</h1></center> <center><h4>Version 4.4.19</h4></center> <center><h4>July 21 2011</h4></center> </div> <div class="footer"> <hr> <p>Copyright © 1997-2011 Ericsson AB. All Rights Reserved.</p> </div> </div> </div></body> </html>