On 03/13/2013 07:21 PM, Winfried de Heiden wrote:

Hi all,

I have no idea if it is ovirt related, nevertheless I give it a try. Playing around with Red Hat Clustering I created a 3 node cluster.

It seems to works fine, but after changing a couple of things /var/log/messages is flooding with warnings like:

Mar 13 18:13:58 node3 corosync[1560]: [TOTEM ] Retransmit List: 9b 9c 88 8a 8b 8e 8f 90 91 92 93 94 95 96 97 98 99 9a Mar 13 18:13:58 node3 corosync[1560]: [TOTEM ] Retransmit List: 9b 9c 88 8a 8b 8e 8f 90 91 92 93 94 95 96 97 98 99 9a Mar 13 18:13:58 node3 corosync[1560]: [TOTEM ] Retransmit List: 9b 9c 88 8a 8b 8e 8f 90 91 92 93 94 95 96 97 98 99 9a

It seems multicast related, which all seems fine:

[root@node1 ~]# netstat -g IPv6/IPv4 Group Memberships Interface RefCnt Group --------------- ------ --------------------- lo 1 all-systems.mcast.net eth0 1 239.192.7.246 eth0 1 all-systems.mcast.net eth1 1 all-systems.mcast.net

Testing with omping works well.

OK, I'm using home hardware, but the 3 nodes are doing virtually nothing. It's on one local network, using local storage etc.

Anyone familiar with this problem? That is: after some "heavy" multicasting packages seem not to arrive.

It might be an virtio network thing, ovirt...?

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I'm not clear on what you are trying to cluster - the hosts, or 3 guests? if the hosts - why? thanks, Itamar