Networking
In a cluster with a Lustre file system, the system network connecting the servers and the clients is implemented using Lustre Networking (LNET), which provides the communication infrastructure required by the Lustre file system. Disk storage is connected to the Lustre file system MDSs and OSSs using traditional storage area network (SAN) technologies.
LNET supports many commonly-used network types, such as InfiniBand and IP networks, and allows simultaneous availability across multiple network types with routing between them. Remote Direct Memory Access (RDMA) is permitted when supported by underlying networks such as Quadrics Elan, Myrinet, and InfiniBand. High availability and recovery features enable transparent recovery in conjunction with failover servers.
LNET provides end-to-end throughput over Gigabit Ethernet (GigE) networks in excess of 100 MB/s, throughput up to 3 GB/s using InfiniBand quad data rate (QDR) links, and throughput over 1 GB/s across 10GigE interfaces.
Read more about this topic: Lustre (file System)