A storage area network (SAN) is a high-speed network that connects storage devices and servers. SAN offers high levels of performance, reliability, and security. If your VMs are located on a Fiber Channel or an ISCSI device, NAKIVO Backup & Replication can use the Direct SAN Access transport mode for VM backup and replication. In the Direct SAN Access mode, VM data is read directly from a SAN storage over Fiber Channel or ISCSI, which significantly improves performance and increases the speed of backup and replication jobs, while removing the load from your production network.
Direct SAN Access transport mode can be used for the following operations:
Using the Direct SAN Access transport mode can establish multiple advantages for your backup process. Fiber Channel and ISCSI offer much higher VM backup performance compared to regular network backups because data is transferred at higher speeds, thus shortening backup windows. Also, VM data is transferred LAN-free, thus reducing the load on your production network.
In order to use Direct SAN Access transport mode, NAKIVO Backup & Replication should be deployed on the machine that is physically connected to a SAN. By default, NAKIVO Backup & Replication automatically determines if direct SAN access is available, and uses it for VM backup, replication, and recovery. You can also force jobs to only use the Direct SAN Access mode, so that jobs do not fail over to the network mode, if SAN is unavailable.
NAKIVO Backup & Replication relies on the VMware VDDK library to provide SAN support, and does not make any write/modification operations on the SAN LUNs. VM data is read directly from LUNs over Fiber Channel/ISCSI, processed, and transferred to a destination. Therefore, the product does not compromise data integrity or interfere with the data of running VMs on your SAN datastores.