What's New in Backup and Recovery?</ti tle> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <meta http-equiv="Content-Language" content="EN"> <meta http-equiv="Content-Style-Type" content="text/css"> <meta http-equiv="Content-Script-Type" content="text/javascript"> <meta name="ro bots" content="all" scheme="http://www.robotstxt.org/"> <meta name="doctitle" content="Oracle® Database Backup and Recovery Advan ced User's Guide 10g Release 1 (10.1)"> <meta name="partno" content="B10734-01"> <meta name="docid" content="BRADV"> <link rel="Start " href="../../index.htm" title="Home" type="text/html"> <link rel="Copyright" href="../../dcommon/html/cpyr.htm" title="Copyright" ty pe="text/html"> <link rel="Stylesheet" href="../../dcommon/css/doccd.css" title="Default" type="text/css"> <link rel="Contents" href= "toc.htm" title="Contents" type="text/html"> <link rel="Index" href="index.htm" title="Index" type="text/html"> <link rel="Prev" href ="preface.htm" title="Previous" type="text/html"> <link rel="Next" href="part1.htm" title="Next" type="text/html"> <link rel="alterna te" href="../b10734.pdf" title="PDF version" type="application/pdf"> </head> <body> <div class="header"> <p><a name="top" id="top" hr ef="#BEGIN">Skip Headers</a></p> <table summary="" cellspacing="0" cellpadding="0" width="100%"> <tr> <td align="left" valign="top">< font color="#330099" face="Helvetica, Arial, sans-serif"><strong>Oracle® Database Backup and Recovery Advanced User's Guide<br> 1 0<i>g</i> Release 1 (10.1)</strong><br> Part Number B10734-01</font></td> <td valign="bottom" align="right"> <table summary="" cells pacing="0" cellpadding="0" width="270"> <tr> <td align="center" valign="top"><a href="../../index.htm"><img src="../../dcommon/gifs/p rodicon.gif" alt="Go to Documentation Home" border="0"><br> <font size="-2">Home</font></a></td> <td align="center" valign="top"><a h ref="../../nav/portal_3.htm"><img src="../../dcommon/gifs/bookicon.gif" alt="Go to Book List" border="0"><br> <font size="-2">Book Li st</font></a></td> <td align="center" valign="top"><a href="toc.htm"><img src="../../dcommon/gifs/conticon.gif" alt="Go to Table of C ontents" border="0"><br> <font size="-2">Contents</font></a></td> <td align="center" valign="top"><a href="index.htm"><img src="../.. /dcommon/gifs/indxicon.gif" alt="Go to Index" border="0"><br> <font size="-2">Index</font></a></td> <td align="center" valign="top">< a href="../../mix$101/b12039/toc.htm"><img src="../../dcommon/gifs/mix.gif" alt="Go to Master Index" border="0"><br> <font size="-2"> Master Index</font></a></td> <td align="center" valign="top"><a href="../../dcommon/html/feedback.htm"><img src="../../dcommon/g ifs/feedback.gif" alt="Go to Feedback page" border="0"><br> <font size="-2">Feedback</font></a></td></tr></table></td></tr></table> < hr> <table summary="layout table" cellspacing="0" cellpadding="0" width="100%"> <tr> <td align="left" valign="top"> <table summary="l ayout table" cellspacing="0" cellpadding="0" align="left" width="90"> <tr> <td align="center" valign="top"><a href="preface.htm"><img src="../../dcommon/gifs/larrow.gif" alt="Go to previous page" border="0"><br> <font size="-2">Previous</font></a></td> <td align="ce nter" valign="top"><a href="part1.htm"><img src="../../dcommon/gifs/rarrow.gif" alt="Go to next page" border="0"><br> <font size="-2" >Next</font></a></td></tr></table></td> <td align="right" valign="top"><a href="../b10734.pdf"><font size="-2">View PDF</font></a></t d></tr></table> <a name="BEGIN"></a></div> <div class="IND"> <a name="969897"></a>  <h1 c lass="Title"><font face="Arial, Helvetica, sans-serif" color="#330099"><br> <a name="BRADV021">What's New in Backup and Recovery?</a> </font></h1>  <a name="971366"></a> <p class="BP">This section describes new features of Recovery Manager in Oracle Database Release 10<em class="Italic">g</em> and provides pointers to additional information. For information on new features in Ora cle9<em class="Italic">i</em> and previous releases, refer to the documentation for those releases.</p> <a name="971400"></a> <h2 cl ass="PH"><font face="Arial, Helvetica, sans-serif">Oracle Database Release 10<em class="Italic">g</em> New Features in Backup and Rec overy</font></h2> <a name="971382"></a> <p class="BP">The new features for this release greatly increase the manageability of RMAN, making backup and recovery simpler and more performant.</p> <ul class="LB1"> <li class="LB1" type="disc"><a name="971264"></a>Flash R ecovery Area <p><a name="971265"></a></p> <p class="BP1">A flash recovery area is a directory, file system, or Automatic Storage Man agement disk group that serves as the default storage area for files related to recovery. Such files include</p> <ul class="LD2"> <li class="LD2" type="CIRCLE"><a name="969918"></a>Multiplexed copies of the control file and online redo logs</li> <li class="LD2" type ="CIRCLE"><a name="969919"></a>Archived redo logs and flashback logs</li> <li class="LD2" type="CIRCLE"><a name="969921"></a>RMAN bac kups</li> <li class="LD2" type="CIRCLE"><a name="969922"></a>Files created by <code>RESTORE</code> and <code>RECOVER</code> commands< /li></ul> <a name="969923"></a> <p class="BP1">Recovery components of the database interact with the flash recovery area to ensure t hat the database is completely recoverable using files in the flash recovery area. The database manages the disk space in the flash r ecovery area, and when there is not sufficient disk space to create new files, the database creates more room automatically by deleti ng the minimum set of files from flash recovery area that are obsolete, backed up to tertiary storage, or redundant.</p> <a name="970 749"></a> <div align="center"> <table class="NoteAlso" border="0" width="80%" cellpadding="0" cellspacing="0" dir="ltr" summary="Thi s is a layout table to format a note" title="This is a layout table to format a note"> <tr class="NoteAlso"> <td class="NoteAlso"><a name="970752"></a><font face="Arial, Helvetica, sans-serif"><strong class="NH">See Also:</strong></font> <a name="970753"></a> <ul c lass="NL"> <li class="NL" type="disc"><a name="971179"></a><em class="Italic"><a class="xlinkSRC BRBSC183" href="../../server$101/b10 735/setup.htm#BRBSC183">Oracle Database Backup and Recovery Basics</a></em> to learn how to set up the flash recovery area</li> <li c lass="NL" type="disc"><a name="971181"></a><a href="rcmconfg.htm#1009785">"Configuring the Flash Recovery Area: Advanced Topics"</a>< a href="rcmconfg.htm#1009785"></a></li></ul></td></tr></table></div></li> <li class="LB1" type="disc"><a name="969924"></a>Oracle Fla shback Database <p><a name="969925"></a></p> <p class="BP1">With the <code>FLASHBACK</code> <code>DATABASE</code> command, you can q uickly revert a database to a previous time--without restoring datafiles and performing media recovery. When you enable the Flashback Database feature, the database automatically creates, deletes, and manages flashback logs inside the flash recovery area. When you r un the <code>FLASHBACK</code> <code>DATABASE</code> command, the database uses the flashback logs as well as the archived redo logs t o reconstruct its contents at the specified time.</p> <a name="970785"></a> <div align="center"> <table class="NoteAlso" border="0" width="80%" cellpadding="0" cellspacing="0" dir="ltr" summary="This is a layout table to format a note" title="This is a layout table to format a note"> <tr class="NoteAlso"> <td class="NoteAlso"><a name="970788"></a><font face="Arial, Helvetica, sans-serif"><strong class="NH">See Also:</strong></font> <a name="970789"></a> <p class="NB"><a href="rcmflash.htm#1020720">"Oracle Flashback Database: Alternative to Point-In-Time Recovery"</a><a href="rcmflash.htm#1020720"></a></p></td></tr></table></div></li> <li class="LB1" type= "disc"><a name="969926"></a>Incrementally Updated Backups: Rolling Forward Image Copies <p><a name="970828"></a></p> <p class="BP1"> You can apply backup incrementals to datafile image copies--not current datafiles--to roll them forward to a specified point in time. In this way, you can potentially reduce recovery time by applying incrementals to copies and avoid taking a full image copy again af ter incremental backups.</p> <a name="970843"></a> <div align="center"> <table class="NoteAlso" border="0" width="80%" cellpadding=" 0" cellspacing="0" dir="ltr" summary="This is a layout table to format a note" title="This is a layout table to format a note"> <tr c lass="NoteAlso"> <td class="NoteAlso"><a name="970831"></a><font face="Arial, Helvetica, sans-serif"><strong class="NH">See Also:</st rong></font> <a name="970837"></a> <p class="NB"><em class="Italic"><a class="xlinkSRC BRBSC186" href="../../server$101/b10735/bkup. htm#BRBSC186">Oracle Database Backup and Recovery Basics</a></em> to learn how to roll forward image copies</p></td></tr></table></di v></li> <li class="LB1" type="disc"><a name="970807"></a>Disk Topology and Automatic Performance Tuning <p><a name="969929"></a></p> <p class="BP1">The new disk topology API extends RMAN's capability to more platforms and file types. RMAN is also able to tune its p arameters automatically according to disk topology information, which decreases the degree of user intervention required for performa nce tuning. RMAN can automatically tune the following:</p> <ul class="LD2"> <li class="LD2" type="CIRCLE"><a name="969930"></a>The co ntents of the backup sets that define which files are multiplexed</li> <li class="LD2" type="CIRCLE"><a name="970866"></a>The level o f multiplexing</li> <li class="LD2" type="CIRCLE"><a name="970867"></a>The number and size of the input and output disk buffers <p>< a name="970873"></a> <a name="970884"></a></p> <div align="center"> <table class="NoteAlso" border="0" width="80%" cellpadding="0" ce llspacing="0" dir="ltr" summary="This is a layout table to format a note" title="This is a layout table to format a note"> <tr class= "NoteAlso"> <td class="NoteAlso"><a name="970876"></a><font face="Arial, Helvetica, sans-serif"><strong class="NH">See Also:</strong> </font> <a name="970883"></a> <p class="NB"><a href="rcmtunin.htm#1006105">"Tuning Recovery Manager: Overview"</a><a href="rcmtunin. htm#1006105"></a> to learn more about RMAN performance tuning</p></td></tr></table></div></li></ul></li> <li class="LB1" type="disc"> <a name="970868"></a>Automatic Datafile Creation <p><a name="969934"></a></p> <p class="BP1">RMAN can create datafiles automatically when the user executes <code>RESTORE</code> or <code>RECOVER</code> commands in the following situations:</p> <ul class="LD2"> <li c lass="LD2" type="CIRCLE"><a name="969935"></a>The control file has metadata for the datafile, that is, the control file was backed up after datafile creation, but the datafile itself is not backed up.</li> <li class="LD2" type="CIRCLE"><a name="969936"></a>The contr ol file does not have metadata for the datafile, that is, the user did not back up the control file after datafile creation. <p><a n ame="970899"></a></p> <div align="center"> <table class="NoteAlso" border="0" width="80%" cellpadding="0" cellspacing="0" dir="ltr" s ummary="This is a layout table to format a note" title="This is a layout table to format a note"> <tr class="NoteAlso"> <td class="No teAlso"><a name="970902"></a><font face="Arial, Helvetica, sans-serif"><strong class="NH">See Also:</strong></font> <a name="970906"> </a> <p class="NB"><em class="Italic"><a class="xlinkSRC RCMRF140" href="../../server$101/b10770/rcmsynta44.htm#RCMRF140">Oracle Dat abase Recovery Manager Reference</a></em> to learn about the behavior of the <code>RECOVER</code> command</p></td></tr></table></div> </li></ul></li> <li class="LB1" type="disc"><a name="969937"></a>Recovery Through Resetlogs <p><a name="969938"></a></p> <p class="B P1">RMAN simplifies recovery with backups taken from an earlier incarnation so that it is as easy as recovering a backup from the sam e incarnation. Hence, you no longer need to make new backups of a database after a <code>RESETLOGS</code>. The procedure is as easy a nd transparent as recovering a backup from the same incarnation. Also, the <code>ALTER</code> <code>DATABASE</code> <code>OPEN</code> <code>RESETLOGS</code> statement is now modified so that the database now archives the current online redo logs (if possible) before clearing the logs.</p> <a name="970930"></a> <div align="center"> <table class="NoteAlso" border="0" width="80%" cellpadding="0" ce llspacing="0" dir="ltr" summary="This is a layout table to format a note" title="This is a layout table to format a note"> <tr class= "NoteAlso"> <td class="NoteAlso"><a name="970922"></a><font face="Arial, Helvetica, sans-serif"><strong class="NH">See Also:</strong> </font> <a name="970929"></a> <p class="NB"><a href="rcmrecov.htm#1006194">"Point-in-Time Recovery to a Previous Incarnation"</a><a href="rcmrecov.htm#1006194"></a></p></td></tr></table></div></li> <li class="LB1" type="disc"><a name="969939"></a>Restore Failover <p><a name="969940"></a></p> <p class="BP1">If a backup piece is inaccessible or corrupted, then RMAN can automatically fail over to another copy of this backup piece during <code>RESTORE</code>. If all copies of this backup set are unusable, then RMAN can fail over to previous redundant backup sets. RMAN continously fails over to previous backups until it exhausts all possibilities. This feature is similar to archived log failover.</p> <a name="970957"></a> <div align="center"> <table class="NoteAlso" border="0" width="80%" cellpadding="0" cellspacing="0" dir="ltr" summary="This is a layout table to format a note" title="This is a layout table to format a note"> <tr class="NoteAlso"> <td class="NoteAlso"><a name="970950"></a><font face="Arial, Helvetica, sans-serif"><strong class="NH"> See Also:</strong></font> <a name="972029"></a> <ul class="NL"> <li class="NL" type="disc"><a name="972035"></a><a href="rcmconc2.ht m#1008584">"Restore Failover"</a><a href="rcmconc2.htm#1008584"></a> for details of restore failover behavior.</li> <li class="NL" ty pe="disc"><a name="972039"></a><em class="Italic"><a class="xlinkSRC RCMRF149" href="../../server$101/b10770/rcmsynta51.htm#RCMRF149" >Oracle Database Recovery Manager Reference</a></em> to learn about the behavior of the <code>RESTORE</code> command</li></ul></td></ tr></table></div></li> <li class="LB1" type="disc"><a name="969941"></a><code>BACKUP</code> Command Creates Backup Sets or Image Copi es <p><a name="969942"></a></p> <p class="BP1">In previous releases, RMAN had two separate commands to back up datafiles: <code>BACK UP</code> and <code>COPY</code>. The <code>BACKUP</code> command backed up the datafile into a backup set, which is a proprietary for mat that allows multiple datafiles to be multiplexed together. The <code>COPY</code> command generated image copies, that is, bit-by- bit copies of datafiles.</p> <a name="969943"></a> <p class="BP1">Starting in Release 10<em class="Italic">g</em>, the <code>COPY</c ode> command is deprecated in favor of an enhanced <code>BACKUP</code> command that enables you to specify whether RMAN should create copies or backup sets. As a result, <code>BACKUP</code> <code>AS</code> <code>COPY</code> can copy a database or multiple tablespace s, datafiles, archived logs and datafile copies.</p> <a name="970979"></a> <div align="center"> <table class="NoteAlso" border="0" w idth="80%" cellpadding="0" cellspacing="0" dir="ltr" summary="This is a layout table to format a note" title="This is a layout table to format a note"> <tr class="NoteAlso"> <td class="NoteAlso"><a name="970972"></a><font face="Arial, Helvetica, sans-serif"><strong class="NH">See Also:</strong></font> <a name="970978"></a> <ul class="NL"> <li class="NL" type="disc"><a name="971302"></a><em class ="Italic"><a class="xlinkSRC BRBSC131" href="../../server$101/b10735/bkup.htm#BRBSC131">Oracle Database Backup and Recovery Basics</a ></em> to learn how to copy files</li> <li class="NL" type="disc"><a name="971301"></a> <em class="Italic"><a class="xlinkSRC RCMRF10 7" href="../../server$101/b10770/rcmsynta9a.htm#RCMRF107">Oracle Database Recovery Manager Reference</a></em> to learn about the outp ut of the <code>BACKUP</code> command</li></ul></td></tr></table></div></li> <li class="LB1" type="disc"><a name="969944"></a>Proxy A rchived Log Backups <p><a name="969945"></a></p> <p class="BP1">RMAN can create and restore proxy backups of archived redo logs.</p> </li> <li class="LB1" type="disc"><a name="969946"></a>Cataloging Backup Pieces <p><a name="969947"></a></p> <p class="BP1">Users ca n now catalog user-specified backup pieces with the <code>CATALOG</code> command. Cataloging a backup piece adds it to the RMAN repos itory so that it is available for use in recovery operations. This enhanced functionality is useful when you make a copy of a backup piece with an operating system utility, or when you move a backup piece from one disk to another so that it has a different absolute path name.</p> <div align="center"> <table class="NoteAlso" border="0" width="80%" cellpadding="0" cellspacing="0" dir="ltr" summary= "This is a layout table to format a note" title="This is a layout table to format a note"> <tr class="NoteAlso"> <td class="NoteAlso" ><a name="971336"></a><font face="Arial, Helvetica, sans-serif"><strong class="NH">See Also:</strong></font> <a name="971342"></a> < p class="NB"><em class="Italic"><a class="xlinkSRC BRBSC131" href="../../server$101/b10735/bkup.htm#BRBSC131">Oracle Database Backup and Recovery Basics</a></em> to learn how to catalog backup pieces, and <em class="Italic"><a class="xlinkSRC RCMRF109" href="../../s erver$101/b10770/rcmsynta11.htm#RCMRF109">Oracle Database Recovery Manager Reference</a></em> for <code>CATALOG</code> syntax</p></td ></tr></table></div> <br> <br></li> <li class="LB1" type="disc"><a name="969950"></a>Fast Incremental Backups <p><a name="969951"></ a></p> <p class="BP1">If you enable block change tracking, then the database automatically tracks which datafile blocks have changed in change tracking files. When you execute <code>BACKUP</code> <code>INCREMENTAL</code>, RMAN uses the change tracking file to more q uickly identify the blocks changed since the previous incremental backup. As a result, RMAN creates incremental backups much faster t han in prior releases.</p> <div align="center"> <table class="NoteAlso" border="0" width="80%" cellpadding="0" cellspacing="0" dir="l tr" summary="This is a layout table to format a note" title="This is a layout table to format a note"> <tr class="NoteAlso"> <td clas s="NoteAlso"><a name="971046"></a><font face="Arial, Helvetica, sans-serif"><strong class="NH">See Also:</strong></font> <a name="971 055"></a> <ul class="NL"> <li class="NL" type="disc"><a name="971309"></a><em class="Italic"><a class="xlinkSRC BRBSC125" href="../. ./server$101/b10735/bkup.htm#BRBSC125">Oracle Database Backup and Recovery Basics</a></em> to learn how to enable block change tracki ng and manage the change tracking file</li></ul></td></tr></table></div> <br> <br></li> <li class="LB1" type="disc"><a name="969952"> </a>Channel Failover <p><a name="969953"></a></p> <p class="BP1">If multiple channels are allocated for a <code>BACKUP</code> comman d, and if RMAN encounters a retriable error (for example, an unplanned instance shutdown in RAC, or a media management error), then R MAN attempts to move the backup to a different channel and complete the work.</p> <a name="971081"></a> <div align="center"> <table class="NoteAlso" border="0" width="80%" cellpadding="0" cellspacing="0" dir="ltr" summary="This is a layout table to format a note" t itle="This is a layout table to format a note"> <tr class="NoteAlso"> <td class="NoteAlso"><a name="971073"></a><font face="Arial, He lvetica, sans-serif"><strong class="NH">See Also:</strong></font> <a name="971076"></a> <p class="NB"><a href="rcmconc1.htm#1006531" >"Channel Failover"</a><a href="rcmconc1.htm#1006531"></a></p></td></tr></table></div></li> <li class="LB1" type="disc"><a name="9699 54"></a>Deferred Error Reporting <p><a name="969955"></a></p> <p class="BP1">For most RMAN commands, RMAN will report errors in the output when they occur and then continue to execute the command if possible. If RMAN can retry a job step on another channel, then it will report a message to this effect. If some job steps could not be completed, then the error stack at the end of command execution will display errors for failed steps.</p></li> <li class="LB1" type="disc"><a name="969956"></a>Improved RMAN Reporting Through <cod e>V$</code> Views <p><a name="969957"></a></p> <p class="BP1">The <code>V$RMAN_OUTPUT</code> memory-only view shows the output of a currently executing RMAN job, whereas the <code>V$RMAN_STATUS</code> control file view indicates the status of both executing and com pleted RMAN jobs. The <code>V$BACKUP_FILES</code> provides access to the information used as the basis of the <code>LIST</code> <code >BACKUP</code> and <code>REPORT</code> <code>OBSOLETE</code> commands.</p></li> <li class="LB1" type="disc"><a name="969958"></a>Auto matic Instance Creation for RMAN TSPITR <p><a name="969959"></a></p> <p class="BP1">RMAN can create an auxiliary instance automatica lly when you perform RMAN TSPITR. RMAN creates the auxiliary instance in the same machine as the target database. RMAN provides intel ligent defaults for the instance, but you can provide nondefault initialization parameters if desired. RMAN automatically dismantles the auxiliary database and instance after a successful TSPITR.</p> <a name="971118"></a> <div align="center"> <table class="NoteAlso " border="0" width="80%" cellpadding="0" cellspacing="0" dir="ltr" summary="This is a layout table to format a note" title="This is a layout table to format a note"> <tr class="NoteAlso"> <td class="NoteAlso"><a name="971110"></a><font face="Arial, Helvetica, sans-s erif"><strong class="NH">See Also:</strong></font> <a name="971117"></a> <p class="NB"><a href="rcmtspit.htm#1014118">"RMAN Tablespa ce Point-in-Time Recovery (TSPITR)"</a><a href="rcmtspit.htm#1014118"></a></p></td></tr></table></div></li> <li class="LB1" type="dis c"><a name="969960"></a>Cross-Platform Tablespace Conversion <p><a name="969961"></a></p> <p class="BP1">The RMAN command <code>CONV ERT</code> <code>TABLESPACE</code> enables you to transport a tablespace from a database running on one platform (for example, Solari s) to a database running on a different platform (for example, Windows).</p> <a name="971147"></a> <div align="center"> <table class ="NoteAlso" border="0" width="80%" cellpadding="0" cellspacing="0" dir="ltr" summary="This is a layout table to format a note" title= "This is a layout table to format a note"> <tr class="NoteAlso"> <td class="NoteAlso"><a name="971140"></a><font face="Arial, Helveti ca, sans-serif"><strong class="NH">See Also:</strong></font> <a name="971146"></a> <p class="NB"><em class="Italic"><a class="xlinkS RC RCMRF190" href="../../server$101/b10770/rcmsynta27.htm#RCMRF190">Oracle Database Recovery Manager Reference</a></em> to learn abou t the <code>CONVERT</code> command</p></td></tr></table></div></li> <li class="LB1" type="disc"><a name="971480"></a>Enhanced Stored Scripts Commands <p><a name="971481"></a></p> <p class="BP1">The recovery catalog now supports global stored scripts, which can be a pplied to any database in the recovery catalog. A number of new commands have been added to allow for easier manipulation and display ing of stored scripts from the recovery catalog.</p> <div align="center"> <table class="NoteAlso" border="0" width="80%" cellpadding= "0" cellspacing="0" dir="ltr" summary="This is a layout table to format a note" title="This is a layout table to format a note"> <tr class="NoteAlso"> <td class="NoteAlso"><a name="971534"></a><font face="Arial, Helvetica, sans-serif"><strong class="NH"><strong clas s="Bold">See Also</strong>:</strong></font> <a name="971524"></a> <p class="NB"><a href="rcmrepos.htm#1006679">"Working with RMAN St ored Scripts in the Recovery Catalog"</a><a href="rcmrepos.htm#1006679"></a> for the new commands and options</p></td></tr></table></ div> <br> <br></li> <li class="LB1" type="disc"><a name="971633"></a>Binary Compression of Backup Sets <p><a name="971634"></a></p> <p class="BP1">RMAN can now write backup sets in a format that uses binary compression to reduce backup set size. Using compressed ba ckup sets can save storage space, as well as network bandwidth when backing up across a network.</p> <div align="center"> <table clas s="NoteAlso" border="0" width="80%" cellpadding="0" cellspacing="0" dir="ltr" summary="This is a layout table to format a note" title ="This is a layout table to format a note"> <tr class="NoteAlso"> <td class="NoteAlso"><a name="971637"></a><font face="Arial, Helvet ica, sans-serif"><strong class="NH">See Also:</strong></font> <a name="971643"></a> <p class="NB"><em class="Italic"><a class="xlink SRC BRBSC138" href="../../server$101/b10735/bkup.htm#BRBSC138">Oracle Database Backup and Recovery Basics</a></em> for more details o n using compressed backupsets.</p></td></tr></table></div> <br> <br></li> <li class="LB1" type="disc"><a name="971701"></a>Enhanced R eporting: RESTORE PREVIEW <p><a name="971702"></a></p> <p class="BP1">The PREVIEW option to the RESTORE command can now tell you whi ch backups will be accessed during a RESTORE operation.</p> <div align="center"> <table class="NoteAlso" border="0" width="80%" cellp adding="0" cellspacing="0" dir="ltr" summary="This is a layout table to format a note" title="This is a layout table to format a note "> <tr class="NoteAlso"> <td class="NoteAlso"><a name="971705"></a><font face="Arial, Helvetica, sans-serif"><strong class="NH">See A lso:</strong></font> <a name="971711"></a> <p class="NB"><em class="Italic"><a class="xlinkSRC BRBSC140" href="../../server$101/b107 35/recov.htm#BRBSC140">Oracle Database Backup and Recovery Basics</a></em> for more details on RESTORE PREVIEW</p></td></tr></table>< /div> <br> <br></li> <li class="LB1" type="disc"><a name="972012"></a>Managing Backup Duration and Throttling <p><a name="972013"></ a></p> <p class="BP1">The BACKUP command now accepts a DURATION clause, which lets you specify limited time windows for backup activi ties and minimize load imposed by backup activities during those backup windows. .</p> <div align="center"> <table class="NoteAlso" b order="0" width="80%" cellpadding="0" cellspacing="0" dir="ltr" summary="This is a layout table to format a note" title="This is a la yout table to format a note"> <tr class="NoteAlso"> <td class="NoteAlso"><a name="972016"></a><font face="Arial, Helvetica, sans-seri f"><strong class="NH">See Also:</strong></font> <a name="972019"></a> <p class="NB"><a href="rcmconc1.htm#1014067">"Managing Backup Windows and Performance: BACKUP... DURATION"</a><a href="rcmconc1.htm#1014067"></a> for more details on managing backup duration and throttling</p></td></tr></table></div> <br> <br></li></ul> <a name="971478"></a></div> <div class="footer"> <hr> <table summary="" ce llspacing="0" cellpadding="0" width="100%"> <tr> <td style="width: 33%;" align="left"> <table summary="layout table" cellspacing="0" cellpadding="0" align="left" width="90"> <tr> <td align="center" valign="top"><a href="preface.htm"><img src="../../dcommon/gifs/larr ow.gif" alt="Go to previous page" border="0"><br> <font size="-2">Previous</font></a></td> <td align="center" valign="top"><a href="p art1.htm"><img src="../../dcommon/gifs/rarrow.gif" alt="Go to next page" border="0"><br> <font size="-2">Next</font></a></td></tr></t able></td> <td style="width: 34%;" align="center"><img src="../../dcommon/gifs/oracle.gif" alt="Oracle"><br> <a href="../../dcommon/h tml/cpyr.htm"><font size="-2">Copyright © 2003 Oracle Corporation</font></a><br> <font size="-2">All Rights Reserved.</font></td > <td style="width: 33%;" align="right"> <table summary="" cellspacing="0" cellpadding="0" width="270"> <tr> <td align="center" valig n="top"><a href="../../index.htm"><img src="../../dcommon/gifs/prodicon.gif" alt="Go to Documentation Home" border="0"><br> <font siz e="-2">Home</font></a></td> <td align="center" valign="top"><a href="../../nav/portal_3.htm"><img src="../../dcommon/gifs/bookicon.gi f" alt="Go to Book List" border="0"><br> <font size="-2">Book List</font></a></td> <td align="center" valign="top"><a href="toc.htm"> <img src="../../dcommon/gifs/conticon.gif" alt="Go to Table of Contents" border="0"><br> <font size="-2">Contents</font></a></td> <td align="center" valign="top"><a href="index.htm"><img src="../../dcommon/gifs/indxicon.gif" alt="Go to Index" border="0"><br> <font s ize="-2">Index</font></a></td> <td align="center" valign="top"><a href="../../mix$101/b12039/toc.htm"><img src="../../dcommon/gifs/mi x.gif" alt="Go to Master Index" border="0"><br> <font size="-2">Master Index</font></a></td> <td align="center" valign="top"><a href="../../dcommon/html/feedback.htm"><img src="../../dcommon/gifs/feedback.gif" alt="Go to Feedback page" border="0"><br> <font siz e="-2">Feedback</font></a></td></tr></table></td></tr></table></div> </body> </html>