[Ocfs2-users] 答复: Is it one issue. Do you have some good ideas, thanks a lot.

[Guozhonghua]

Sorry for delay response.

There is seven node in the OCFS2 Cluster.

The system timeout config is default values as below:
# O2CB_HEARTBEAT_THRESHOLD: Iterations before a node is considered dead.
O2CB_HEARTBEAT_THRESHOLD=31

# O2CB_IDLE_TIMEOUT_MS: Time in ms before a network connection is considered dead.
O2CB_IDLE_TIMEOUT_MS=30000

# O2CB_KEEPALIVE_DELAY_MS: Max. time in ms before a keepalive packet is sent.
O2CB_KEEPALIVE_DELAY_MS=2000

# O2CB_RECONNECT_DELAY_MS: Min. time in ms between connection attempts.
O2CB_RECONNECT_DELAY_MS=2000

The fence_method is set with “reset”, default value.

The test steps is:

1.        The node 2013-SRV06, 2013-SRV09 and 2013-SRV10 is shutdown for the VLAN changed on the switch.

2.        The other four nodes VLAN changed to the same VLAN as the step one, but the host does not shutdown.

3.        As the three nodes, 2013-SRV06, 2013-SRV09 and 2013-SRV10, powered on and restarted and they can’t access OCFS2 cluster with mount error.

Note: Changing VLAN is that changing the management network VLAN, the network is used in OCFS2 kernel to communicate information. The network accessing storage does not changed.

The attachment file is the log digested from the syslog on the nodes.

Thanks a lot.


发件人: ocfs2-users-bounces at oss.oracle.com [mailto:ocfs2-users-bounces at oss.oracle.com] 代表 Srinivas Eeda
发送时间: 2013年4月29日 2:51
收件人: ocfs2-users at oss.oracle.com
主题: Re: [Ocfs2-users] Is it one issue. Do you have some good ideas, thanks a lot.

On 04/28/2013 03:54 AM, Guozhonghua wrote:
Hi, everyone

I have some questions with the OCFS2 when using it as vm-store.

With Ubuntu 1204, kernel version is 3.2.40, and ocfs2-tools version is 1.6.4.

As the network configure change, there are some issues as the log below.

Why is there the information of “Node 255 (he) is the Recovery Master for the dead node 255” in the syslog?
This appears to be a bug. Not sure how big the cluster is, but since this node lost connection to at least few nodes it should have got evicted itself (unless its a very big cluster)

Why the host ZHJD-VM6 is blocked until it reboot one day time later, and what is it wait for still?
last message seems to be at Apr 27 17:44:52, so the node is effectively dead at this time even though it restarted much later. What are the timeouts set to? what is the fence_method set to? Please forward me the messages files from other nodes, I would like to see how other nodes behaved.


Thanks a lot.



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