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<!--$Id: rep_config.so,v 1.10 2008/01/19 14:12:59 bostic Exp $--> <!--Copyright (c) 1997,2008 Oracle. All rights reserved.--> <!--See the file LICENSE for redistribution information.--> <html> <head> <title>Berkeley DB: DbEnv::rep_set_config</title> <meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> <meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++"> </head> <body bgcolor=white> <table width="100%"><tr valign=top> <td> <b>DbEnv::rep_set_config</b> </td> <td align=right> <a href="../../db4-devel-4.7.25/api_cxx/api_core.html"><img src="../../db4-devel-4.7.25/images/api.gif" alt="API"></a> <a href="../../db4-devel-4.7.25/ref/toc.html"><img src="../../db4-devel-4.7.25/images/ref.gif" alt="Ref"></a></td> </tr></table> <hr size=1 noshade> <tt> <b><pre> #include <db_cxx.h> <p> int DbEnv::rep_set_config(u_int32_t which, int onoff); <p> int DbEnv::rep_get_config(u_int32_t which, int *onoffp); </pre></b> <hr size=1 noshade> <b>Description: DbEnv::rep_set_config</b> <p>The DbEnv::rep_set_config method method configures the Berkeley DB replication subsystem.</p> <p>The database environment's replication subsystem may also be configured using the environment's <a href="../../db4-devel-4.7.25/ref/env/db_config.html#DB_CONFIG">DB_CONFIG</a> file. The syntax of the entry in that file is a single line with the string "rep_set_config", one or more whitespace characters, and the method <b>which</b> parameter as a string; for example, "rep_set_config DB_REP_CONF_NOWAIT". Because the <a href="../../db4-devel-4.7.25/ref/env/db_config.html#DB_CONFIG">DB_CONFIG</a> file is read when the database environment is opened, it will silently overrule configuration done before that time.</p> <p>The DbEnv::rep_set_config method configures a database environment, not only operations performed using the specified <a href="../../db4-devel-4.7.25/api_cxx/env_class.html">DbEnv</a> handle.</p> <p>The DbEnv::rep_set_config method may be called at any time during the life of the application.</p> <p>The DbEnv::rep_set_config method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success. </p> <b>Parameters</b> <br> <b>onoff</b><ul compact><li>If the <b>onoff</b> parameter is zero, the configuration flag is turned off. Otherwise, it is turned on.</ul> <b>which</b><ul compact><li>The <b>which</b> parameter must be set to one of the following values: <br> <b><a name="DB_REP_CONF_BULK">DB_REP_CONF_BULK</a></b><ul compact><li>The replication master sends groups of records to the clients in a single network transfer (defaults to off).</ul> <b><a name="DB_REP_CONF_DELAYCLIENT">DB_REP_CONF_DELAYCLIENT</a></b><ul compact><li>The client should delay synchronizing to a newly declared master (defaults to off). Clients configured in this way will remain unsynchronized until the application calls the <a href="../../db4-devel-4.7.25/api_cxx/rep_sync.html">DbEnv::rep_sync</a> method.</ul> <b><a name="DB_REP_CONF_LEASE">DB_REP_CONF_LEASE</a></b><ul compact><li>Master leases will be used for this site (defaults to off). <p>Configuring this option may result in <a name="DB_REP_LEASE_EXPIRED">DB_REP_LEASE_EXPIRED</a> error returns from the <a href="../../db4-devel-4.7.25/api_cxx/db_get.html">Db::get</a> and <a href="../../db4-devel-4.7.25/api_cxx/dbc_get.html">Dbc::get</a> methods when attempting to read entries from a database after the site's master lease has expired.</p> <p>The DbEnv::rep_set_config method may not be called after the <a href="../../db4-devel-4.7.25/api_cxx/repmgr_start.html">DbEnv::repmgr_start</a> or <a href="../../db4-devel-4.7.25/api_cxx/rep_start.html">DbEnv::rep_start</a> methods are called.</p> Once this option is turned on, it may never be turned off.</ul> <b><a name="DB_REP_CONF_NOAUTOINIT">DB_REP_CONF_NOAUTOINIT</a></b><ul compact><li>The replication master will not automatically re-initialize outdated clients (defaults to off).</ul> <b><a name="DB_REP_CONF_NOWAIT">DB_REP_CONF_NOWAIT</a></b><ul compact><li>Berkeley DB method calls that would normally block while clients are in recovery will return errors immediately (defaults to off).</ul> <b><a name="DB_REPMGR_CONF_2SITE_STRICT">DB_REPMGR_CONF_2SITE_STRICT</a></b><ul compact><li>Replication Manager observes the strict "majority" rule in managing elections, even in a group with only 2 sites. This means the client in a 2-site group will be unable to take over as master if the original master fails or becomes disconnected. (See the <a href="../../db4-devel-4.7.25/ref/rep/elect.html">Elections</a> section in the Berkeley DB Reference Guide for more information.) Both sites in the replication group should have the same value for this parameter.</ul> <br></ul> <br> <br><b>Errors</b> <p>The DbEnv::rep_set_config method may fail and throw <a href="../../db4-devel-4.7.25/api_cxx/except_class.html">DbException</a>, encapsulating one of the following non-zero errors, or return one of the following non-zero errors:</p> <br> <b>EINVAL</b><ul compact><li>An invalid flag value or parameter was specified.</ul> <br> <hr size=1 noshade> <b>Description: DbEnv::rep_get_config</b> <p>The DbEnv::rep_get_config method returns whether the specified <b>which</b> parameter is currently set or not.</p> <p>The DbEnv::rep_get_config method may be called at any time during the life of the application.</p> <p>The DbEnv::rep_get_config method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success. </p> <b>Parameters</b> <br> <b>which</b><ul compact><li>The <b>which</b> parameter is the message value for which configuration is being checked.</ul> <b>onoffp</b><ul compact><li>The <b>onoffp</b> parameter references memory into which the configuration of the specified <b>which</b> parameter is copied.</ul> If the returned <b>onoff</b> value is zero, the parameter is off; otherwise on. <br> <hr size=1 noshade> <br><b>Class</b> <a href="../../db4-devel-4.7.25/api_cxx/env_class.html">DbEnv</a> <br><b>See Also</b> <a href="../../db4-devel-4.7.25/api_cxx/rep_list.html">Replication and Related Methods</a> </tt> <table width="100%"><tr><td><br></td><td align=right> <a href="../../db4-devel-4.7.25/api_cxx/api_core.html"><img src="../../db4-devel-4.7.25/images/api.gif" alt="API"></a><a href="../../db4-devel-4.7.25/ref/toc.html"><img src="../../db4-devel-4.7.25/images/ref.gif" alt="Ref"></a> </td></tr></table> <p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> </body> </html>
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