Doc: Improve the description of wd_priority.

Patch is provided by Kenichiro Tanaka.

diff --git a/doc.ja/src/sgml/watchdog.sgml b/doc.ja/src/sgml/watchdog.sgml
index dd386ff8c04dd3af70808b339e804c86ab788b7b..84ff7159028f40e36836d22d58bba048204dc017 100644 (file)
--- a/doc.ja/src/sgml/watchdog.sgml
+++ b/doc.ja/src/sgml/watchdog.sgml
@@ -986,10 +986,18 @@
       to select master watchdog node.
       The node with the higher <varname>wd_priority</varname> value will get selected
       as master watchdog node when cluster will be electing its new master node
-      at the time of cluster startup or in the event of old master watchdog node failure
+      in the event of old master watchdog node failure.
+      <varname>wd_priority</varname> is also valid at the time of cluster startup.
+      When some watchdog nodes start up at same time,a node with the higher <varname>wd_priority</varname>
+      value is selected as a master node.
+      So we should start watchdog nodes in order of <varname>wd_priority</varname> priority to prevent 
+      unintended nodes from being selected as masters.
       -->
       このパラメータによってローカルのwatchdogノードがマスターに選ばれる優先度を上げることができます。
-      クラスタの初期起動時や古いマスターノードが故障した状況でクラスタがマスターノードの選択を行う際に、<varname>wd_priority</varname>が高いノードがマスターwatchdogノードに選ばれます。
+      古いマスターノードが故障した状況でクラスタがマスターノードの選択を行う際に、<varname>wd_priority</varname>が高いノードがマスターwatchdogノードに選ばれます。
+      <varname>wd_priority</varname>はクラスタの初期起動時にも有効なので、
+      複数のwatchdogノードを同時に起動した場合、<varname>wd_priority</varname>が高いノードがマスターwatchdogノードに選ばれます。
+      このため、watchdogノードは意図しないノードがマスターに選ばれることが無いように<varname>wd_priority</varname>の優先順位が高い順に起動するべきです。
      </para>
      <para>
       <!--

diff --git a/doc/src/sgml/watchdog.sgml b/doc/src/sgml/watchdog.sgml
index b037b58cb1183429738d5452ad43f5af74254918..ad79ea0a7095deb2f070980154b97c7a8662f57d 100644 (file)
--- a/doc/src/sgml/watchdog.sgml
+++ b/doc/src/sgml/watchdog.sgml
@@ -633,7 +633,12 @@
       to select master watchdog node.
       The node with the higher <varname>wd_priority</varname> value will get selected
       as master watchdog node when cluster will be electing its new master node
-      at the time of cluster startup or in the event of old master watchdog node failure
+      in the event of old master watchdog node failure.
+      <varname>wd_priority</varname> is also valid at the time of cluster startup.
+      When some watchdog nodes start up at same time,a node with the higher <varname>wd_priority</varname>
+      value is selected as a master node.
+      So we should start watchdog nodes in order of <varname>wd_priority</varname> priority to prevent
+      unintended nodes from being selected as masters.
      </para>
      <para>
       <varname>wd_priority</varname> is not available in versions prior to