11g RAC - single client access name (scan) 的設定問題

Oracle 11.2.0.2.0   ,   Linux AS 5.3   64bit   

[root@wsjrac01 etc]# cat   hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1       localhost.localdomain localhost
::1             localhost6.localdomain6 localhost6

10.109.196.151    wsjrac01
10.1.1.151        wsjpri01
10.109.196.152    wsjvip01

10.109.196.153    wsjrac02
10.1.1.153        wsjpri02
10.109.196.154    wsjvip02

10.109.196.155    wsjrac03
10.1.1.155        wsjpri03
10.109.196.156    wsjvip03

#single client access name(scan)
10.109.196.157    wsjscan1
10.109.196.158    wsjscan2 

 

oracle 11g 的scan最多可以配置3個地址並對應域名。 SCAN是配置到DNS伺服器上的，提供給RAC的僅僅是對應的DNS NAME   ,    這三個IP在DNS伺服器上各對應同一個DNS NAME， 就是SCAN .