ag/cpython-source-deps
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Import BSDDB 4.7.25 (as of svn r89086)

Browse Source
This commit is contained in:
Zachary Ware
2017-09-04 13:40:25 -05:00
parent 4b29e0458f
commit 8f590873d0
4781 changed files with 2241032 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

91
docs/gsg_db_rep/JAVA/manageblock.html Normal file
View File

@@ -0,0 +1,91 @@
<?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>Managing Blocking Operations</title>
<link rel="stylesheet" href="gettingStarted.css" type="text/css" />
<meta name="generator" content="DocBook XSL Stylesheets V1.62.4" />
<link rel="home" href="index.html" title="Getting Started with Replicated Berkeley DB Applications" />
<link rel="up" href="addfeatures.html" title="Chapter 5. Additional Features" />
<link rel="previous" href="addfeatures.html" title="Chapter 5. Additional Features" />
<link rel="next" href="noautoinit.html" title="Stop Auto-Initialization" />
</head>
<body>
<div class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">Managing Blocking Operations</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="addfeatures.html">Prev</a> </td>
<th width="60%" align="center">Chapter 5. Additional Features</th>
<td width="20%" align="right"> <a accesskey="n" href="noautoinit.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="manageblock"></a>Managing Blocking Operations</h2>
</div>
</div>
<div></div>
</div>
<p>
When a replica is in the process of synchronizing with its master, all DB
operations are blocked until such a time as the synchronization is completed.
For replicas with a heavy read load, these blocked operations may represent an
unacceptable loss in throughput.
</p>
<p>
You can configure DB so that it will not block when synchronization is in
process. Instead, the DB operation will fail,
<span>
immediately throwing a
<tt class="classname">com.sleepycat.db.ReplicationLockoutException</tt>
exception.
</span>
When this happens, it is up to your application to your application to determine
what action to take (that is, logging the event, making an appropriate user
response, retrying the operation, and so forth).
</p>
<p>
To turn off blocking on synchronization, specify
<span>
<tt class="literal">ReplicationConfig.NOWAIT</tt> and
<tt class="literal">true</tt> to
<tt class="methodname">Environment.setReplicationConfig()</tt>.
To turn off this feature, specify
<tt class="literal">false</tt> for the
<tt class="literal">ReplicationConfig.NOWAIT</tt> field.
</span>
</p>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="addfeatures.html">Prev</a> </td>
<td width="20%" align="center">
<a accesskey="u" href="addfeatures.html">Up</a>
</td>
<td width="40%" align="right"> <a accesskey="n" href="noautoinit.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">Chapter 5. Additional Features </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> Stop Auto-Initialization</td>
</tr>
</table>
</div>
</body>
</html>