The FC ports on the HBA of the Oracle MaxRep Replication Engine are used to access the primary and secondary LUNs on the Oracle FS Systems over the SAN fabric.
During synchronous replication, the FC ports allow access to both the source and target LUNs. During asynchronous replication, the FC ports on the Oracle FS System Replication Engine at the primary site allow access to the primary site LUNs and the FC ports on the Replication Engine at the secondary site allow access to the secondary site LUNs.
There are three types of FC ports on a
Replication Engine:
- Appliance Initiator Source (AIS) ports or initiator ports for source LUNs:
- Used for read-only access to the source LUN during the initial synchronization. The initiator port for source LUNs must be zoned to the Controller ports on the source and target Oracle FS Systems. AIS ports are virtual ports that are located on port 1 of each FC HBA on the Replication Engine.
- Appliance Initiator Target (AIT) Ports or initiator ports for target LUNs:
- Used for read and write access to the target LUN during the initial synchronization. The AIT ports are used for access to any LUNs that are mounted for use on the Replication Engine. The AIT ports are also used to write data to the source Oracle FS System during data recovery.
- The AIT ports are used for /home, /Retention, /Web, and /backup LUN mapping. The initiator for the target LUN mapping port must be zoned to the Controller ports on the source and target Oracle FS Systems. AIT ports are virtual ports that are located on port 1 of each FC HBA on the Replication Engine.
- Appliance Target (AT) ports or target ports for the write splitter and the write mirror:
- Used to accept IOs from the source Oracle FS System. The port on the Oracle FS System
Controller behaves like an initiator port when it is used for replication. The AT ports are also used by hosts that access virtual snapshots on the Replication Engine.
- Target ports must be zoned to the source and target Oracle FS System
Controller ports and to any hosts accessing virtual snapshots from the Replication Engine. AT ports are physical ports that are located on port 2 of each FC HBA on the Replication Engine.
Tip: Connect all the FC ports from each HBA to one SAN fabric. Connect HBAs to separate fabrics to minimize points of failure and to ensure redundancy.