# These and any other user-defined properties will be assigned to the mLBInfo member
# variable of the Database object.
#
-# Leave at false to use the single-server variables above
+# Leave at false to use the single-server variables above. If you set this
+# variable, the single-server variables will generally be ignored (except
+# perhaps in some command-line scripts).
+#
+# The first server listed in this array (with key 0) will be the master. The
+# rest of the servers will be slaves. To prevent writes to your slaves due to
+# accidental misconfiguration or MediaWiki bugs, set read_only=1 on all your
+# slaves in my.cnf. You can set read_only mode at runtime using:
+#
+# SET @@read_only=1;
+#
+# Since the effect of writing to a slave is so damaging and difficult to clean
+# up, we at Wikimedia set read_only=1 in my.cnf on all our DB servers, even
+# our masters, and then set read_only=0 on masters at runtime.
+#
$wgDBservers = false;
/** How long to wait for a slave to catch up to the master */