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SCI Transport Connections in MySQL Cluster

[sci] sections in the config.ini file explicitly define SCI (Scalable Coherent Interface) connections

between cluster nodes. Using SCI transporters in MySQL Cluster is supported only when the MySQL

binaries are built using —with-ndb-sci=/your/path/to/SCI. The path should point to a

directory that contains at a minimum lib and include directories containing SISCI libraries and

headerfiles. (SeeSection 17.3.5, “Using High-Speed Interconnects with MySQL Cluster" for morę information about SCI.)

In addition, SCI requires specialized hardware.

It is strongly recommended to use SCI Transporters only for communication between ndbd processes.

Notę also that using SCI Transporters means that the ndbd processes never sleep. For this reason,

SCI Transporters should be used only on machines having at leasttwo CPUs dedicated for use by

ndbd processes. There should be at least one CPU per ndbd process, with at least one CPU left in

reserve to handle operating system activities.