Setup Only One SCAN VIP
Oracle recommends that you allocate 3 or above SCAN VIP to load balance incoming connections. The more SCAN VIP, the more clients and connections they… Read More »Setup Only One SCAN VIP
SCAN IP
How to Build 18c RAC - 1 of 4 - Preparing Two Database Servers
For 19c, you may refer to: How to Build 19c RAC - 1 of 4 - Preparing Two Database Servers. Network Design for RAC Let's… Read More »How to Build 18c RAC - 1 of 4 - Preparing Two Database Servers
How Srvctl Add Listener to Second Network
I assume that you have added the second network to the grid infrastructure. Let's continue our work. Make sure the second network is available in… Read More »How Srvctl Add Listener to Second Network
How to Add a Subnet to Grid
Servers that have multiple network interfaces may offload the traffic by adding another subnet to grid infra. In this post, I demonstrate how I add… Read More »How to Add a Subnet to Grid
How to Relocate SCAN Listener
Sometimes, we may find the scan vip and listeners are all located at one node. [grid@primary01 ~]$ ps -ef | grep lsnr grid … Read More »How to Relocate SCAN Listener
How to Add a SCAN VIP
Preparation 1. Looking up SCAN name on DNS before adding a SCAN VIP [root@primary01 ~]# nslookup primary-cluster-scan Server: 10.0.0.199 Address: … Read More »How to Add a SCAN VIP
Why Don't We Explicitly Bind VIP and SCAN into NIC
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… Read More »Why Don't We Explicitly Bind VIP and SCAN into NIC
How RAC Change Subnet
Oracle 12c uses 4 types of IP addresses to configure network of RAC: Public IP Private IP Virtual IP SCAN IP In which, Public IP,… Read More »How RAC Change Subnet