Oracle + RHEL/Windows + 3PAR + Peer Persistence
Oracle across two data centers or sites using HPE 3PAR StoreServ Peer Persistence on StoreServ Storage systems.
Peer Persistence is a high availability configuration between two data centers in which the Oracle RAC hosts are setup in a cluster configuration. It has access to storage arrays in both sites.
Peer Persistence achieves automatic transparent failover in the event of a complete array or data center failure with the help of the Quorum Witness (QW) software. The QW software needs to be installed at a third site. It will act as an independent witness should one of the arrays or data centers become unavailable.
Oracle RAC Grid Infrastructure—ASM groups and RC groups
In this configuration, each host can access LUNs exported from both the sites. This setup helps in protecting against a storage failure at a site. If the HPE 3PAR StoreServ array in site A fails, a failover will occur at the HPE 3PAR StoreServ array on site B. This action is transparent and automatic allowing Oracle RAC nodes on site A continued access to storage on site B without any interruption. Of course, this implies that customers need to have sufficient bandwidth between their sites since traffic from the host will be routed across the inter-site link connections to the secondary array at the remote site.
3PAR
