??? What's "HEARTBEAT CONNECTION TIMEOUT" ???

[Elif Gius]

I have a simple question.
When I do a "cmscancl" I see the contents of the binary configuration file.
There, I can see a setting which is called "heartbeat connection timeout: 16 sec."

So what does this say, and where does this setting come from ?
Does the cluster do some math and put this setting automatically ?

[Dietmar Konermann]

That value is by default calculated automatically. Current revisions do something like:

CONNECTION_TIMEOUT = NODE_TIMEOUT * ((NODE_COUNT / 4) + 2)

(integer operation, / is DIV!)

Regards...
Dietmar.

[Elif Gius]

But what does this option mean ??? What happens when the "heartbeart connection timeout" is reached ???

[Dietmar Konermann · Accepted solution]

During cluster (re-)formation the heartbeat (hacl-hb) and general services (hacl-gs) connections between the nodes are (re-)established if needed. The value determines how long SG tries to do this. So this is internal operation, nothing one should worry about.

Regards...
Dietmar.

[Elif Gius]

Hi,

we have ServiceGuard A.11.09
we have node timeout 8 sec.,2 nodes and the heartbeat_connection_timeout is 16 sec....
after your formula heartbeat_connection_timeout should be 20 sec.

can you explain it further ???

[Dietmar Konermann]

As mentioned above you need to do integer maths...

2 / 4 == 0

So we get: 8 * ( 0 + 2 ) == 16


Regards...
Dietmar.