Home > Storage > PowerScale (Isilon) > Industry Solutions and Verticals > Media and Entertainment > PowerScale OneFS with Baselight by FilmLight: Best Practices and Configuration > NFS and nconnect
RDMA is the best option when available. However, sometimes implementing RDMA is not possible due to client NIC or network constraints. In these situations, TCP-based NFS connections can be used with the nconnect mount option. The nconnect option has been back ported for use in CentOS 8 in the Linux 4 kernel and so is available to Baselight client systems.
The nconnect mount allows the client system to open multiple parallel TCP connections between the client and the PowerScale storage. The maximum and recommended nconnect value is 16. Using nconnect with TCP-based communication results in nearly the same NFS throughput as RDMA. However, nconnect does not offer the same CPU load reduction benefits.