Spectrum Scale network block I/O

The comparison of the SD and NSD Spectrum Scale cluster configurations, that was described in the previous main topic, showed an additional overhead for NSD.

The major cause of the overhead for NSD was introduced with the network block I/O layer. This layer was used for exchanging data between the NSD client and NSD server nodes.

A well known tuning recommendation for NSD with its network block I/O was the usage of a larger MTU (jumbo frames) for the Spectrum Scale network.