Linux

How to Build 18c RAC – 1 of 4 – Preparing Two Database Servers

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Network Design for RAC Let’s see the network design of our cluster database. [root@primary01 ~]# vi /etc/hosts # Public 192.168.10.11 primary01 primary01.example.com 192.168.10.12 primary02 primary02.example.com # Private 192.168.24.11 primary01-priv primary01-priv.example.com 192.168.24.12 primary02-priv primary02-priv.example.com # VIP 192.168.10.111 primary01-vip primary01-vip.example.com 192.168.10.112 primary02-vip primary02-vip.example.com # SCAN # 192.168.10.81 primary-cluster-scan primary-cluster-scan.example.com # 192.168.10.82 primary-cluster-scan primary-cluster-scan.example.com # 192.168.10.83 primary-cluster-scan primary-cluster-scan.example.com […]
SCAN IP

Why Don’t We Explicitly Bind VIP and SCAN into NIC

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It’s because Oracle clusterware will bind them automatically and dynamically. I think we should try to figure out the interface configurations.First, let’s see what interfaces we have now.[root@primary01 ~]$ ll /etc/sysconfig/network-scripts/ifcfg-*-rw-r–r–  1 root root 314 May 30  2016 /etc/sysconfig/network-scripts/ifcfg-eth0-rw-r–r–  1 root root 311 May 30  2016 /etc/sysconfig/network-scripts/ifcfg-eth1-rw-r–r–. 1 root root 254 Jul 22  2014 /etc/sysconfig/network-scripts/ifcfg-loBut […]
Network

How to Change Subnet of Grid

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Oracle 12c uses 4 types of IP addresses to configure network of RAC:Public IPPrivate IPVirtual IPSCAN IPIn which, Public IP, Virtual IP and SCAN IP are in the same subnet. Up to 4 pairs of Private IP can be set in RAC, which should be in another subnet and used for interconnect redundancy to secure […]