forked from docs/doc-exports
Chen, Junjie
ea05d1a734
Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com> Co-authored-by: Chen, Junjie <chenjunjie@huawei.com> Co-committed-by: Chen, Junjie <chenjunjie@huawei.com>
15 lines
1.7 KiB
HTML
15 lines
1.7 KiB
HTML
<a name="dcs-faq-0730058"></a><a name="dcs-faq-0730058"></a>
|
|
|
|
<h1 class="topictitle1">When Does a Master/Standby Switchover Occur?</h1>
|
|
<div id="body1596093777162"><p id="dcs-faq-0730058__en-us_topic_0209664638_p1273026135619">A master/standby switchover may occur in the following scenarios:</p>
|
|
<ul id="dcs-faq-0730058__en-us_topic_0209664638_ul13825740165612"><li id="dcs-faq-0730058__en-us_topic_0209664638_li1182614407563">A master/standby switchover operation is initiated on the DCS Console.</li><li id="dcs-faq-0730058__en-us_topic_0209664638_li68263401567">If the master node of a master/standby instance fails, a master/standby switchover will be triggered.<p id="dcs-faq-0730058__en-us_topic_0209664638_p1493444911524"><a name="dcs-faq-0730058__en-us_topic_0209664638_li68263401567"></a><a name="en-us_topic_0209664638_li68263401567"></a>For example, running commands that consume a lot of resources, such as <strong id="dcs-faq-0730058__b61671835105">KEYS</strong> commands, will cause CPU usage to spike and as result triggers a master/standby switchover.</p>
|
|
</li><li id="dcs-faq-0730058__en-us_topic_0209664638_li108263402566">If you restart a master/standby instance on the DCS console, a master/standby switchover will be triggered.</li></ul>
|
|
<p id="dcs-faq-0730058__en-us_topic_0209664638_p151011145582">After a master/standby switchover occurs, you will receive a notification. Check whether the client services are running properly. If not, check whether the TCP connection is normal and whether it can be re-established after the master/standby switchover to restore the services.</p>
|
|
</div>
|
|
<div>
|
|
<div class="familylinks">
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="dcs-faq-191204001.html">Master/Standby Switchover</a></div>
|
|
</div>
|
|
</div>
|
|
|