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<h2 class="title">PECL/mysqlnd_ms 1.2 series</h2>
<p class="para">
1.2.1-beta
<ul class="itemizedlist">
<li class="listitem">
<span class="simpara">
Release date: 01/2012
</span>
</li>
<li class="listitem">
<span class="simpara">
Motto/theme: see 1.2.0-alpha
</span>
</li>
</ul>
</p>
<p class="para">
Minor test changes.
</p>
<p class="para">
1.2.0-alpha
<ul class="itemizedlist">
<li class="listitem">
<span class="simpara">
Release date: 11/2011
</span>
</li>
<li class="listitem">
<span class="simpara">
Motto/theme: Global Transaction ID injection and quality-of-service concept
</span>
</li>
</ul>
</p>
<p class="para">
In version 1.2 the focus continues to be on supporting MySQL database clusters
with asynchronous replication. The plugin tries to make using the cluster
introducing a quality-of-service filter which applications can use to define
what service quality they need from the cluster. Service levels provided are
eventual consistency with optional maximum age/slave slag, session consistency
and strong consistency.
</p>
<p class="para">
Additionally the plugin can do client-side global transaction id injection
to make manual master failover easier.
</p>
<p class="para">
Feature changes
<ul class="itemizedlist">
<li class="listitem">
<p class="para">
Introduced quality-of-service (QoS) filter. Service levels provided by QoS filter:
<ul class="itemizedlist">
<li class="listitem">
<span class="simpara">
eventual consistency, optional option slave lag
</span>
</li>
<li class="listitem">
<span class="simpara">
session consistency, optional option GTID
</span>
</li>
<li class="listitem">
<span class="simpara">
strong consistency
</span>
</li>
</ul>
</p>
</li>
<li class="listitem">
<p class="para">
Added the <span class="function"><a href="function.mysqlnd-ms-set-qos.html" class="function">mysqlnd_ms_set_qos()</a></span> function to set the
required connection quality at runtime. The new constants related to
<span class="function"><a href="function.mysqlnd-ms-set-qos.html" class="function">mysqlnd_ms_set_qos()</a></span> are:
<ul class="itemizedlist">
<li class="listitem">
<span class="simpara">
<strong><code>MYSQLND_MS_QOS_CONSISTENCY_STRONG</code></strong>
</span>
</li>
<li class="listitem">
<span class="simpara">
<strong><code>MYSQLND_MS_QOS_CONSISTENCY_SESSION</code></strong>
</span>
</li>
<li class="listitem">
<span class="simpara">
<strong><code>MYSQLND_MS_QOS_CONSISTENCY_EVENTUAL</code></strong>
</span>
</li>
<li class="listitem">
<span class="simpara">
<strong><code>MYSQLND_MS_QOS_OPTION_GTID</code></strong>
</span>
</li>
<li class="listitem">
<span class="simpara">
<strong><code>MYSQLND_MS_QOS_OPTION_AGE</code></strong>
</span>
</li>
</ul>
</p>
</li>
<li class="listitem">
<p class="para">
Added client-side global transaction id injection (GTID).
</p>
</li>
<li class="listitem">
<p class="para">
New statistics related to GTID:
<ul class="itemizedlist">
<li class="listitem">
<span class="simpara">
<em>gtid_autocommit_injections_success</em>
</span>
</li>
<li class="listitem">
<span class="simpara">
<em>gtid_autocommit_injections_failure</em>
</span>
</li>
<li class="listitem">
<span class="simpara">
<em>gtid_commit_injections_success</em>
</span>
</li>
<li class="listitem">
<span class="simpara">
<em>gtid_commit_injections_failure</em>
</span>
</li>
<li class="listitem">
<span class="simpara">
<em>gtid_implicit_commit_injections_success</em>
</span>
</li>
<li class="listitem">
<span class="simpara">
<em>gtid_implicit_commit_injections_failure</em>
</span>
</li>
</ul>
</p>
</li>
<li class="listitem">
<p class="para">
Added <span class="function"><a href="function.mysqlnd-ms-get-last-gtid.html" class="function">mysqlnd_ms_get_last_gtid()</a></span> to fetch the last
global transaction id.
</p>
</li>
<li class="listitem">
<p class="para">
Enabled support for multi master without slaves.
</p>
</li>
</ul>
</p>
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