mirror of
https://github.com/berkeleydb/je.git
synced 2024-11-15 01:46:24 +00:00
98 lines
4.1 KiB
HTML
98 lines
4.1 KiB
HTML
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
|
||
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
<html xmlns="http://www.w3.org/1999/xhtml">
|
||
<head>
|
||
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
|
||
<title>Recoverability</title>
|
||
<link rel="stylesheet" href="gettingStarted.css" type="text/css" />
|
||
<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
|
||
<link rel="start" href="index.html" title="Getting Started with Berkeley DB, Java Edition Transaction Processing" />
|
||
<link rel="up" href="introduction.html" title="Chapter 1. Introduction" />
|
||
<link rel="prev" href="multithread-intro.html" title="Multi-threaded Applications" />
|
||
<link rel="next" href="perftune-intro.html" title="Performance Tuning" />
|
||
</head>
|
||
<body>
|
||
<div xmlns="" class="navheader">
|
||
<div class="libver">
|
||
<p>Library Version 12.2.7.5</p>
|
||
</div>
|
||
<table width="100%" summary="Navigation header">
|
||
<tr>
|
||
<th colspan="3" align="center">Recoverability</th>
|
||
</tr>
|
||
<tr>
|
||
<td width="20%" align="left"><a accesskey="p" href="multithread-intro.html">Prev</a> </td>
|
||
<th width="60%" align="center">Chapter 1. Introduction</th>
|
||
<td width="20%" align="right"> <a accesskey="n" href="perftune-intro.html">Next</a></td>
|
||
</tr>
|
||
</table>
|
||
<hr />
|
||
</div>
|
||
<div class="sect1" lang="en" xml:lang="en">
|
||
<div class="titlepage">
|
||
<div>
|
||
<div>
|
||
<h2 class="title" style="clear: both"><a id="recovery-intro"></a>Recoverability</h2>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<p>
|
||
An important part of JE's transactional guarantees is durability.
|
||
<span class="emphasis"><em>Durability</em></span> means that once a
|
||
transaction has been committed, the database modifications performed
|
||
under its protection will not be lost due to system failure.
|
||
</p>
|
||
<p>
|
||
|
||
|
||
JE supports a normal recovery that runs against a subset of
|
||
your log files. This is a routine procedure used whenever your
|
||
environment is first opened upon application startup, and it is intended to
|
||
ensure that your database is in a consistent state. JE also
|
||
supports archival backup and recovery in the case of
|
||
catastrophic failure, such as the loss of a physical disk
|
||
drive.
|
||
</p>
|
||
<p>
|
||
This book describes several different backup procedures
|
||
you can use to protect your on-disk data. These procedures
|
||
range from simple offline backup strategies to hot failovers. Hot failovers
|
||
provide not only a backup mechanism, but
|
||
also a way to recover from a fatal hardware failure.
|
||
</p>
|
||
<p>
|
||
This book also describes the recovery procedures you should use
|
||
for each of the backup strategies that you might employ.
|
||
</p>
|
||
<p>
|
||
For a detailed description of backup and restore procedures, see
|
||
|
||
<span>
|
||
the <em class="citetitle">Getting Started with Berkeley DB, Java Edition</em> guide.
|
||
</span>
|
||
|
||
</p>
|
||
</div>
|
||
<div class="navfooter">
|
||
<hr />
|
||
<table width="100%" summary="Navigation footer">
|
||
<tr>
|
||
<td width="40%" align="left"><a accesskey="p" href="multithread-intro.html">Prev</a> </td>
|
||
<td width="20%" align="center">
|
||
<a accesskey="u" href="introduction.html">Up</a>
|
||
</td>
|
||
<td width="40%" align="right"> <a accesskey="n" href="perftune-intro.html">Next</a></td>
|
||
</tr>
|
||
<tr>
|
||
<td width="40%" align="left" valign="top">Multi-threaded
|
||
|
||
Applications </td>
|
||
<td width="20%" align="center">
|
||
<a accesskey="h" href="index.html">Home</a>
|
||
</td>
|
||
<td width="40%" align="right" valign="top"> Performance Tuning</td>
|
||
</tr>
|
||
</table>
|
||
</div>
|
||
</body>
|
||
</html>
|