Oracle RAC Private Connection fail. what is the preferable node?
Hello Everyone! I need all your helps about Oracle RAC.
I would like to know that when the private network in oracle rac down, which is the preferable node in the cluster (cluster of 2 nodes) to takeover the cluster.
Can I set/get the failover policy to point to one node in the cluster?
Thank you in advance.
Hi,
Base on my testing environment, I use VMware to build the oracle rac.
Because ifdown command reacts differently, now I use vmware feature on Network interface "disconnect" as pulling out the link from network interface.
Please, kindly have a look on the actions, I have done. Correct me if I am wrong.
I have two nodes which are node1 "rac1" and node2 "rac2".
1. I start crs on node2 "rac2" so that node2 have the role to write to OCR
2. After node2 start completely, I start crs on node1 "rac1" to join cluster.
3. I use disconnect network link from private network on node1, and I also check using ethtool to check link detected:
[root@rac1 ~]# ethtool eth1 | grep Link
Link detected: no
[root@rac1 ~]# ifconfig eth1
eth1 Link encap:Ethernet HWaddr 00:0C:29:6A:73:20
inet addr:192.168.2.231 Bcast:192.168.2.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:2658671 errors:0 dropped:0 overruns:0 frame:0
TX packets:2069398 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1615768514 (1.5 GiB) TX bytes:985464556 (939.8 MiB)
4. After some seconds, I checked the log file
[cssd(9517)]CRS-1612:Network communication with node rac2 (2) missing for 50% of timeout interval. Removal of this node from cluster in 14.620 seconds
2013-02-12 04:12:30.419
[cssd(9517)]CRS-1611:Network communication with node rac2 (2) missing for 75% of timeout interval. Removal of this node from cluster in 6.610 seconds
2013-02-12 04:12:34.436
[cssd(9517)]CRS-1610:Network communication with node rac2 (2) missing for 90% of timeout interval. Removal of this node from cluster in 2.590 seconds
2013-02-12 04:12:37.036
[cssd(9517)]CRS-1607:Node rac2 is being evicted in cluster incarnation 251972986; details at (:CSSNM00007:) in /u01/app/11.2.0/grid/log/rac1/cssd/ocssd.log.
2013-02-12 04:12:39.136
[cssd(9517)]CRS-1625:Node rac2, number 2, was manually shut down
2013-02-12 04:12:39.140
[cssd(9517)]CRS-1601:CSSD Reconfiguration complete. Active nodes are rac1 .
2013-02-12 04:12:39.157
[crsd(9957)]CRS-5504:Node down event reported for node 'rac2'.
2013-02-12 04:12:45.519
[crsd(9957)]CRS-2773:Server 'rac2' has been removed from pool 'Generic'.
2013-02-12 04:12:45.519
[crsd(9957)]CRS-2773:Server 'rac2' has been removed from pool 'ora.oradb'
5. I check the status resource of cluster and I see that Node1 "rac1" is the survived node.
Please help me to analyze it.
Thanks,
Edited by: 985243 on Feb 12, 2013 1:53 AM
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