cmquerycl & HEARTBEAT

[Enrico Venturi]

Hi all,
I come back on the cmquerycl topic ...
It's still not clear to me how the command can detect the HEARTBEAT lan .... It seems to me that sometimes it detects 2 heartbeats (lan0 and lan1), othertimes it detects only lan0, ON THE SAME CLUSTER!
Does it mean that by running the command several times you can get different results depending on the environmental conditions (traffic, ... )?

Thanx again.
Enrico

[Stephen Doud]

SG finds a common LAN between the servers and names it a HEARTBEAT_IP in the template file.

If you wish to have multiple LANs transmit heartbeat for redundancy, by all means, change every reference from STATIONARY_IP to HEARTBEAT_IP. This insures multiple LAN paths carry heartbeat traffic (as well as normal traffic).

-Stephen

[Enrico Venturi]

Stephen,
do you mean that SG search for only one HEARTBEAT LAN? As soon as it finds one HB LAN it stops to search anymore, is it correct?
Then if I want more than one HP LAN I must edit the cmclconf.ascii file ... isn't it?
Have you any official HP documentation about that or do you derive your answer from your experience?

Thanks very much!
Enrico

[melvyn burnard · Accepted solution]

SG will denote the first lan it thinks capable of handling heartbeats as HEARTBEAT_IP in the ascii file, and then any other configured useable lans get marked as STATIONARY_IP.
It is up to you to you to decide whether you want to run a heartbeat over these STATIONARY_IP lans or not, and make the changes.
All this is discussed in the Managing MC/ServiceGuard manual available at:
http://docs.hp.com/hpux/ha
or even better on the Customer Education course for ServiceGuard.

[Enrico Venturi]

Tell me more about the customer education course ... I didn't find anything on line!
Enrico

[James R. Ferguson]

Hi Venturi:

For MC/ServiceGuard education, start here:

http://www.hp.com/education/sg_promotion.html

In general, for education services, see:

http://www.hp.com/education/

Regards!

...JRF...

[Enrico Venturi]

Anything for free?
Thanks
Enrico

[James R. Ferguson]

Hi Venturi:

Free? Yes, the incredible wealth of manuals and white papers available for downloading in pdf format or viewing in html here:

http://docs.hp.com/hpux/ha/index.html

This sure beats the days when to get a manual you had to purchase it, assuming one was available in the first place! ;-)

Regards!

...JRF...