How to identify clients registered with GAB using gabconfig -C command?

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Article ID: 100038028

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Description

Global Attomic Broadcast (GAB) now provides the ability to track its kernel clients by name in VCS 6.0. A new option -C in gabconfig command lists the names of the GAB (kernel) clients that have registered their names with GAB.

Below outputs are from a two node SFRAC 6.0 cluster.

# gabconfig -C

List of 3 GAB clients

Refcount        Client Name

        1       GAB_Control

        2       VxFen

        2       VCSMM

The above command (gabconfig -C) when combined with -a would list the ports along with their clients, if a name is registered.

# gabconfig -aC GAB Port Memberships =============================================================== Port a client refcount 1 name GAB_Control Port a gen 36cf0c membership 01 Port b client refcount 2 name VxFen Port b gen 36cf10 membership 01 Port d gen 36cf0b membership 01 Port f gen 36cf31 membership 01 Port h gen 36cf39 membership 01 Port o client refcount 2 name VCSMM Port o gen 36cf0d membership 01 Port u gen 36cf2f membership 01 Port v gen 36cf2a membership 01 Port w gen 36cf2c membership 01 Port y gen 36cf29 membership 01 #

The field refcount for the particular GAB client gets incremented when the client:
          - Inits GAB API
          - Registers a GAB port
And is decremented when the GAB client:
          - Unregisters a GAB port
          - Deinits GAB API

The following line indicates that VxFEN has initialized itself with the GAB API (refcount=1) and is incremented when it has also register a GAB port (refcount=2).

Port b client refcount 2 name VxFen

The GAB Client tracking feature is currently available for only GAB kernel clients. Currently VxFen (port b) and VCSMM (port o) are the clients that use this feature.