Version 5.2
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Version 5.2
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The Virtual Interface Architecture (VIA) communication architecture is supported for inter-node communications. VIA enables high-speed communication amongst clusters of Windows NT SMP machines. The DB2VIAENABLE registry variable specifies if the VIA communications protocol is used. See the Administration Guide for details.
Direct communication is available between nodes on the same host (multiple logical nodes). In previous releases the DB2 Fast Communication Manager used a dedicated communication daemon (FCM daemon) to service communications requests whether they were local or remote. Now the FCM daemon can be bypassed when the remote nodes reside on the same physical machine. This enables high-speed communication amongst multiple logical nodes for Extended Enterprise Edition users on AIX. The DB2_FORCE_FCM_BP environment variable allows direct communication between multiple logical nodes (MLNs). See the Administration Guide for details.