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<!doctype HTML public "-//W3C//DTD HTML 4.0 Frameset//EN"> <html> <head> <title>Paragon Hot Processing & Volume Shadow Copy Service</title> <meta http-equiv="Content-Type" content="text/html; charset=windows-1252"> <meta name="generator" content="RoboHelp by eHelp Corporation www.ehelp.com"> <link rel="stylesheet" href="default_ns.css"><script type="text/javascript" language="JavaScript" title="WebHelpSplitCss"> <!-- if (navigator.appName !="Netscape") { document.write("<link rel='stylesheet' href='default.css'>");} //--> </script> <style> <!-- body { background-image:url("file:///D:\005cProjects\005cExact%20Image\005cgray"); background-repeat:repeat; background-attachment:scroll; background-color:#ffffff; } A:visited { color:#800080; } A:link { color:#0000ff; } --> </style><style type="text/css"> <!-- td.whs1 { width:44.6pt; border:solid #000000 1.0pt; padding:0in 5.4pt 0in 5.4pt; } p.whs2 { text-align:center; } img_whs3 { width:45px; height:45px; border-style:none; } td.whs4 { width:489.65pt; border:solid #000000 1.0pt; border-left:none; padding:0in 5.4pt 0in 5.4pt; padding-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; } div.whs5 { width:100%; } img_whs6 { border:none; float:none; width:368px; height:5px; border-style:none; } p.whs7 { color:#808000; font-size:8pt; font-weight:normal; } --> </style><script type="text/javascript" language="JavaScript" title="WebHelpInlineScript"> <!-- function reDo() { if (innerWidth != origWidth || innerHeight != origHeight) location.reload(); } if ((parseInt(navigator.appVersion) == 4) && (navigator.appName == "Netscape")) { origWidth = innerWidth; origHeight = innerHeight; onresize = reDo; } onerror = null; //--> </script> <style type="text/css"> <!-- div.WebHelpPopupMenu { position:absolute; left:0px; top:0px; z-index:4; visibility:hidden; } --> </style><script type="text/javascript" language="javascript1.2" src="whmsg.js"></script> <script type="text/javascript" language="javascript" src="whver.js"></script> <script type="text/javascript" language="javascript1.2" src="whproxy.js"></script> <script type="text/javascript" language="javascript1.2" src="whutils.js"></script> <script type="text/javascript" language="javascript1.2" src="whtopic.js"></script> </head> <body lang="EN-US"><script type="text/javascript" language="javascript1.2"> <!-- if (window.gbWhTopic) { if (window.addTocInfo) { addTocInfo("Basic Concepts\nParagon Hot Processing"); addAvenueInfo("Basic Concepts","System_and_Data_Protection.htm","GPT_versus_MBR.htm"); addButton("show",BTN_TEXT,"Show","","","","",0,0,"","",""); } if (window.writeBtnStyle) writeBtnStyle(); if (window.writeIntopicBar) writeIntopicBar(1); if (window.setRelStartPage) { setRelStartPage("db9Per_eng060608.htm"); autoSync(0); sendSyncInfo(); sendAveInfoOut(); } } else if (window.gbIE4) document.location.reload(); //--> </script><script type="text/javascript" language="JavaScript1.2" x-save-method="compute-relative" src="./ehlpdhtm.js" name="EHELP_DHTM"></script> <script type="text/javascript" language=JavaScript1.2> <!-- if( typeof( kadovFilePopupInit ) != 'function' ) kadovFilePopupInit = new Function();if( typeof( kadovTextPopupInit ) != 'function' ) kadovTextPopupInit = new Function(); //--> </script> <h2>Paragon Hot Processing</h2> <h3>Offline versus Online Data Processing</h3> <p>In the course of time there have been developed various methods of data processing. Despite different work concept, all of them can be divided into two principal groups: <i>offline (cold)</i> and <i>online (hot)</i> data processing techniques.</p> <p class=WordNormalWeb style="margin: 0in; margin-bottom: .0001pt;"> </p> <p>As the name infers, <i>offline data processing</i> can only be accomplished when the data is in consistent state (the operating system and all the applications are completely shut down). Actually it is the most preferable way of image creation or data cloning, since software can obtain an exclusive right to process data that guaranties high level of operating efficiency. However, the <i>offline data processing</i> is absolutely out of question when dealing with 24/7 production environments.</p> <p> </p> <p>In contrast, <i>online data processing</i> enables to create a consistent snapshot even as the data is currently modified. It is particularly useful for systems with high availability requirements, but it wonÆt be accomplished until all active transactions are complete. The point is to provide a coherent state of all open files and databases involved in a process, taking into account that applications may still keep writing to disks. As a result an online data processing cannot boast high operating speed.</p> <p> </p> <p>Our program supports both offline and online methods of data processing. As far as online method is concerned it offers its own hot processing algorithm.</p> <h3>Paragon Hot Processing Technology</h3> <p>Paragon Hot Processing is an online copy/<a class="glossterm" href="javascript:kadovTextPopup(this)" id="HotSpot9356">backup</a><span class=glosstext style="display: 'none';" id=POPUP89577836 > The term backup originates from the time when the best way to protect valuable information was to store it in form of archives on external media. It's become now a general notion to mean making duplications of data for protection purposes.</span> technology for Windows NT+ family operating systems. Developed back in 2001, nowadays it is integrated with all copy/backup solutions offered by the company.</p> <p class=WordNormalWeb style="margin: 0in; margin-bottom: .0001pt;"> </p> <p>Paragon Hot Processing is not exactly a snapshot technology, though it has much in common with it. During an online copy/backup, the program uses the kernel mode driver <i>HOTCORE.SYS</i> to intercept and control disk write activity of applications and the operating system. The <i>hotcore driver</i> as an integral part of the program is installed during the setup procedure (thatÆs why the system reboot is required to complete the setup procedure). For the most part the driver is in the idle mode until it is activated with the program. While in this mode it bypasses any calls having no effect on the overall system performance, but a few kilobytes of the system memory.</p> <p class=WordNormalWeb style="margin: 0in; margin-bottom: .0001pt;"> </p> <p>Paragon Hot Processing technology offers copy/backup of locked partitions and hard disks under Windows NT+ family operating systems providing both high operating efficiency as well as low hardware requirements.</p> <p class=WordNormalWeb style="margin: 0in; margin-bottom: .0001pt;"> </p> <table class=NormalTable x-use-null-cells style="border: none; x-border-left: 1px table-solid; x-border-top: 1px table-solid; x-border-right: 1px table-solid; x-border-bottom: 1px table-solid; border-collapse: separate; background-color: #33cccc; border-spacing: 0px; border-spacing: 0px;" cellspacing=0 bgcolor=#33CCCC> <tr> <td width="44.6pt" class="whs1"> <p align="center" class="whs2"><b style="font-weight: bold;"><img src="db9_help_en060608Per_web.files/image002.png" width="45px" height="45px" border="0" class="img_whs3"></b></td> <td width="489.6pt" class="whs4"> <p><b style="font-weight: bold;">It is not recommended to use Paragon Hot Processing with active SQL Server, Exchange or Oracle databases since the backup image contents may be corrupted.</b></td></tr> </table> <div placeholder id="footer" class="whs5"> <p id=p39> </p> <p id=p40><img src="horiz_mustard_bg.jpg" x-save-file="TRUE" x-save-method="compute-relative" width="368px" height="5px" border="0" class="img_whs6"></p> <p id="p41" class="whs7">Copyright(C) 1998-2008 Paragon Technologie GmbH</p> <p id="p42" class="whs7">All rights reserved</p> </div> <script language="javascript1.2" type="text/javascript"><!-- kadovTextPopupInit('HotSpot9356','POPUP89577836'); //--></script><script type="text/javascript" language="javascript1.2"> <!-- if (window.writeIntopicBar) writeIntopicBar(0); //--> </script> </body> </html>