mirror of
https://github.com/sigmasternchen/php-doc-en
synced 2025-03-17 01:18:55 +00:00
More 1.4 related documentation
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@326359 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Ulf Wendel
parent
b3dcd0626b
commit
c0fa963152
1 changed files with 137 additions and 12 deletions
|
|
@ -1451,12 +1451,14 @@ function pick_server($connected, $query, $masters, $slaves, $last_used_connectio
|
|||
<varlistentry xml:id="ini.mysqlnd-ms-plugin-config-v2.failover">
|
||||
<term>
|
||||
<parameter>failover</parameter>
|
||||
<type>string</type>
|
||||
Upto and including 1.3.x: <type>string</type>.
|
||||
Since 1.4.0: <type>object</type>.
|
||||
</term>
|
||||
<listitem>
|
||||
<para>
|
||||
Failover policy. Supported policies:
|
||||
<literal>disabled</literal> (default), <literal>master</literal>.
|
||||
<literal>disabled</literal> (default), <literal>master</literal>,
|
||||
<literal>loop_before_master</literal> (Since 1.4.0).
|
||||
</para>
|
||||
<para>
|
||||
If no failover policy is set, the plugin will not do any
|
||||
|
|
@ -1466,6 +1468,14 @@ function pick_server($connected, $query, $masters, $slaves, $last_used_connectio
|
|||
the application to handle the error and, for example, resent the
|
||||
last statement to trigger the selection of another server.
|
||||
</para>
|
||||
<para>
|
||||
Please note, the automatic failover logic is applied when opening
|
||||
connections only. Once a connection has been opened no automatic attempts
|
||||
are made to reopen it in case of an error. If, for example, the server
|
||||
a connection is connected to is shut down and the user attempts to
|
||||
run a statement on the connection, no automatic failover
|
||||
will be tried. Instead, an error will be reported.
|
||||
</para>
|
||||
<para>
|
||||
If using <literal>failover=master</literal> the plugin will implicitly
|
||||
failover to a master, if available. Please check the
|
||||
|
|
@ -1474,7 +1484,7 @@ function pick_server($connected, $query, $masters, $slaves, $last_used_connectio
|
|||
</para>
|
||||
<para>
|
||||
<example>
|
||||
<title>Optional master failover when failing to connect to slave</title>
|
||||
<title>Optional master failover when failing to connect to slave (PECL/mysqlnd_ms < 1.4.0)</title>
|
||||
<programlisting role="ini">
|
||||
<![CDATA[
|
||||
{
|
||||
|
|
@ -1498,17 +1508,132 @@ function pick_server($connected, $query, $masters, $slaves, $last_used_connectio
|
|||
</example>
|
||||
</para>
|
||||
<para>
|
||||
Please note, the automatic failover logic is applied when opening
|
||||
connections only. Once a connection has been opened no automatic attempts
|
||||
are made to reopen it in case of an error. If, for example, the server
|
||||
a connection is connected to is shut down and the user attempts to
|
||||
run a statement on the connection, no automatic failover
|
||||
will be tried. Instead, an error will be reported.
|
||||
Since PECL/mysqlnd_ms 1.4.0 the failover configuration keyword refers to an
|
||||
object.
|
||||
</para>
|
||||
<para>
|
||||
<example>
|
||||
<title>New syntax since 1.4.0</title>
|
||||
<programlisting role="ini">
|
||||
<![CDATA[
|
||||
{
|
||||
"myapp": {
|
||||
"master": {
|
||||
"master_0": {
|
||||
"host": "localhost"
|
||||
}
|
||||
},
|
||||
"slave": {
|
||||
"slave_0": {
|
||||
"host": "192.168.78.136",
|
||||
"port": "3306"
|
||||
}
|
||||
},
|
||||
"failover": {"strategy": "master" }
|
||||
}
|
||||
}
|
||||
]]>
|
||||
</programlisting>
|
||||
</example>
|
||||
</para>
|
||||
<informaltable>
|
||||
<tgroup cols="3">
|
||||
<colspec colwidth="1*"/>
|
||||
<colspec colwidth="7*"/>
|
||||
<colspec colwidth="2*"/>
|
||||
<thead>
|
||||
<row>
|
||||
<entry>Keyword</entry>
|
||||
<entry>Description</entry>
|
||||
<entry>Version</entry>
|
||||
</row>
|
||||
</thead>
|
||||
<tbody>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>strategy</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
<para>
|
||||
Failover policy. Possible values:
|
||||
<literal>disabled</literal> (default), <literal>master</literal>,
|
||||
<literal>loop_before_master</literal>
|
||||
</para>
|
||||
<para>
|
||||
A value of <literal>disabled</literal> disables automatic failover.
|
||||
</para>
|
||||
<para>
|
||||
Setting <literal>master</literal> instructs the plugin to try
|
||||
to connect to a master in case of a slave connection error. If the
|
||||
master connection attempt fails, the plugin exists the failover
|
||||
loop and returns an error to the user.
|
||||
</para>
|
||||
<para>
|
||||
If using <literal>loop_before_master</literal> and a slave request
|
||||
is made, the plugin tries to connect to other slaves before failing
|
||||
over to a master. If multiple master are given and multi master is enabled,
|
||||
the plugin also loops over the list of masters and attempts to connect
|
||||
before returning an error to the user.
|
||||
</para>
|
||||
</entry>
|
||||
<entry>Since 1.4.0.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>remember_failed</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
<para>
|
||||
Remember failures for the duration of a web request. Default:
|
||||
<literal>false</literal>.
|
||||
</para>
|
||||
<para>
|
||||
If set to <literal>true</literal> the plugin will remember failed
|
||||
hosts and skip the hosts in all future load balancing made for
|
||||
the duration of the current web request.
|
||||
</para>
|
||||
</entry>
|
||||
<entry>
|
||||
Since 1.4.0. Experimental feature. The feaure is only available together
|
||||
with the <literal>random</literal> and <literal>roundrobin</literal>
|
||||
load balancing filter. The behaviour and syntax is likely to change
|
||||
in the future.
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry>
|
||||
<literal>max_retries</literal>
|
||||
</entry>
|
||||
<entry>
|
||||
<para>
|
||||
Maximum number of connection attempts before skipping host.
|
||||
Default: <literal>0</literal> (no limit).
|
||||
</para>
|
||||
<para>
|
||||
The setting is used to prevent hosts from being dropped of the
|
||||
host list upon the first failure. If set to <literal>n > 0</literal>,
|
||||
the plugin will keep the node in the node list even after a failed
|
||||
connection attempt. The node will not be removed immediately from the slave respectively
|
||||
master lists after the first connection failure but instead be tried to
|
||||
connect to up to <literal>n</literal> times in future load balancing rounds
|
||||
before being removed.
|
||||
</para>
|
||||
</entry>
|
||||
<entry>
|
||||
Since 1.4.0. Experimental feature. The feaure is only available together
|
||||
with the <literal>random</literal> and <literal>roundrobin</literal>
|
||||
load balancing filter. The behaviour and syntax is likely to change
|
||||
in the future.
|
||||
</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</informaltable>
|
||||
<para>
|
||||
Setting <literal>failover</literal> to any other value but
|
||||
<literal>disabled</literal> or <literal>master</literal> will not
|
||||
emit any warning or error.
|
||||
<literal>disabled</literal>, <literal>master</literal> or
|
||||
<literal>loop_before_master</literal>
|
||||
will not emit any warning or error.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
|
|
@ -1583,7 +1708,7 @@ function pick_server($connected, $query, $masters, $slaves, $last_used_connectio
|
|||
The setting has been introduced in 1.4.0. It is recommended to set it
|
||||
if using lazy connections.
|
||||
</para>
|
||||
<para>
|
||||
<para>
|
||||
The <literal>server_charset</literal> setting serves two purposes. It
|
||||
acts as a fallback charset to be used for string escaping done before
|
||||
a connection has been established and it helps to avoid escaping pitfalls
|
||||
|
|
|
|||
Loading…
Reference in a new issue