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тАО07-31-2008 12:32 PM
тАО07-31-2008 12:32 PM
NODE_NAME unix1
NETWORK_INTERFACE lan0
HEARTBEAT_IP 10.0.20.16
NETWORK_INTERFACE lan1
NETWORK_INTERFACE lan2
HEARTBEAT_IP 192.168.0.1
NODE_NAME unix2
NETWORK_INTERFACE lan0
HEARTBEAT_IP 10.0.20.18
NETWORK_INTERFACE lan1
NETWORK_INTERFACE lan2
HEARTBEAT_IP 192.168.0.2
both node lan2 are in a cross-over (please avoid the cross-over dabate).
both node lan1 are standbay to lan0 which is data and heartbeat.
1. if both lan1 and lan0 cards go down will my packages failover to node2 even if the lan2 the heartbeat lan is still up (imagine i unplug the cables on lan1 and 2 on node1)?
2. if lan2 is down will the package failover to node2 or stay on node1 since lan0 is still sending heartbeat info?
thanks,
amir
Solved! Go to Solution.
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тАО07-31-2008 12:46 PM
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тАО07-31-2008 12:46 PM
тАО07-31-2008 12:46 PM
Re: data lans down & heartbeat up will there be a failover?
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тАО07-31-2008 12:59 PM
тАО07-31-2008 12:59 PM
Re: data lans down & heartbeat up will there be a failover?
thanks guys that's what i wanted.
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тАО07-31-2008 02:23 PM
тАО07-31-2008 02:23 PM
Re: data lans down & heartbeat up will there be a failover?
example
Script_Parameters:
ITEM STATUS MAX_RESTARTS RESTARTS NAME
Subnet up 10.0.x.x
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тАО07-31-2008 03:31 PM
тАО07-31-2008 03:31 PM
Re: data lans down & heartbeat up will there be a failover?
Also:
You can use following command to list all configurable/configured parameters in Cluster and package configuration files
grep ^[A-Z] /etc/cmluster/clustername.config
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тАО08-01-2008 01:06 AM
тАО08-01-2008 01:06 AM
Re: data lans down & heartbeat up will there be a failover?
If you have put in a subnet value, the packag emanager will monitor this subnet. If it is left blank, then the package will not monitor the subnet, even though in your control file you may put a SUBNET/IP pair for adding an IP to a SUBNET
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тАО08-01-2008 09:06 AM
тАО08-01-2008 09:06 AM
Re: data lans down & heartbeat up will there be a failover?
that's what i did. i added the subnet value 0f 10.0.0.0 for SUBNET.
another question. if lan0 is disconnected will lan1 on unix1 take over based on the configuration above with no disrupption? or will there be a slight disruption but will still take over?
in a related question, in windows hp has a adapter teaming option where there is a loadbalancing between 2 nics and zero disruption if one lan goes down, is there something similar in hpux or is there only a "standby" nic within the service guard application where the "standby" nic simply takeover if the main nic fails?
thanks,
amir
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тАО08-01-2008 10:22 AM
тАО08-01-2008 10:22 AM
Re: data lans down & heartbeat up will there be a failover?
There will be a small delay, but it will be transparent to users/applications provided that the physical configuration is correct, and the standby lan is in working condition.
in a related question, in windows hp has a adapter teaming option where there is a loadbalancing between 2 nics and zero disruption if one lan goes down, is there something similar in hpux or is there only a "standby" nic within the service guard application where the "standby" nic simply takeover if the main nic fails?
Yes there is something similar, it is called Auto Port Aggregation (APA) and is additional software that is used to aggregate or "team" two or more physical NIC's to provide loadbalancing and redundancy.
It is a separaetly purchaseable product unless you have the new HP-UX 11.31 OE's.
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тАО08-04-2008 12:43 PM
тАО08-04-2008 12:43 PM
Re: data lans down & heartbeat up will there be a failover?
package is running on node2.
i unpligged the network cables from node2 in the following order:
lan2 is disconnected (crossover heartbeat)
lan0 is disconnected (heartbeat/data)
lan1 is disconnected (lan0 standby nic)
cluster starts reformation.
node1 crashes and reboots.
why?
i thought node1 should take over the package and if there is any crash/reboots it should be on node2 since it's network cards are the ones that were disconnected (failed).
any way to fix this problem?
just it case it matters i am using a lock disk for arbitration.
thanks,
amir
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тАО08-04-2008 12:56 PM
тАО08-04-2008 12:56 PM
Re: data lans down & heartbeat up will there be a failover?
When you removed the last heartbeat connection, there would have been a time interval where each node would have attempted to get the cluster lock, and the node that won (in this case node2) stays up.
I would hazard a guess and say your cluster lock disk is in the VG used by the package.
Using a Quorum Server would have prevented this, as the QS has to be reachable via the network.
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тАО08-04-2008 01:04 PM
тАО08-04-2008 01:04 PM
Re: data lans down & heartbeat up will there be a failover?
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тАО08-04-2008 11:14 PM
тАО08-04-2008 11:14 PM
Re: data lans down & heartbeat up will there be a failover?
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тАО08-04-2008 11:15 PM
тАО08-04-2008 11:15 PM
Re: data lans down & heartbeat up will there be a failover?
One thing toi stress here, the test scenario you used is NOT a normal scenario.
If you lost only one cable/NIC/heartbeat link, the nodes would still stay up and running.