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Client

sales1 - scan.example.com IN A 133.22.67.194 IN A 133.22.67.193 IN A 133.22.67.192. Network File. DNS. Client. Client. Client. Client. RAC Cluster. Node 1. Node 2. Node 3. Client Configuration Example. GNS VIP 192.0.2.155. GNS. DNS. Sends cluster names.

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Client

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  1. sales1 - scan.example.com IN A 133.22.67.194 IN A 133.22.67.193 IN A 133.22.67.192 Network File DNS Client Client Client Client RAC Cluster Node 1 Node 2 Node 3 Client Configuration Example

  2. GNS VIP 192.0.2.155 GNS DNS Sends cluster names Dynamically Collects cluster names Client Client Resolution Node Cluster domain name Mycluster.example.com

  3. GNS Architecture Overview GNS VIP DNS Client Client Resolution Node Cluster domain name Mycluster.example.com

  4. Oracle GNS Architecture VIP resolution Hostname to address resolution Vip name and hostname resolution GNS DNS Register node vip & scan vip Use 1 SCAN VIP Get 3 SCAN VIPS One name that resolves three IP’s Load Balancing SL SL SL Remote listener LL LL LL LL Client LL Local Listener SCAN + port + service Node 1 Node 4 Node n Node 2 Node 3 Node n Dynamic IP Address obtained by oraroot agent Least Loaded Node for Service Least Loaded Node Profile.xml Node & SCAN VIP agents orarootagent DHCP orarootagent orarootagent orarootagent orarootagent mDNS mDNS mDNS mDNS mDNS Client Configuration Example

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