Hello Tao, > Hi Elliott, > Elliott Perrin wrote: > > > > Hello All, > > > > > > > > I have multiple OCFS2 clusters on SLES10 SP2 running Xen. We needed > to > > increase the O2CB_HEARTBEAT_THRESHOLD from 31 up to 61 and did so > > successfully on 2 of our 3 clusters. > > > > > > > > However on one of the three clusters we are not able to change the > > value. The /etc/sysconfig/o2cb file contains 61 as the threshold > after > > reconfiguring via /etc/init.d/o2cb configure, we reconfigure all 3 > > nodes at the same time after unmounting the volume and stopping ocfs2 > > and o2cb on all nodes in the cluster but on restart the value is > reset > > to 31. We have even gone so far as to change the default value in the > > /etc/init.d/o2cb script from 31 to 61 thinking that must be where the > > setting of 31 is coming from and even then, the value is set back to > > 31. Oh, and yes, we have rebooted with the new values in both the > > /etc/sysconfig/o2cb config and with our change of the default value > in > > /etc/init.d/o2cb with no luck. > > > I would deem that you said that > /sys/kernel/config/cluster/ocfs2/heartbeat/dead_threshold can't be set > to 61, right?
Yes that is correct. > You said even with restart, the heartbeat threadshold is still 31? That > would be too strange. I thought the same as well. > So could you please do the following steps: > 1. /etc/init.d/o2cb offline > this will make the cluster offline. Please make sure you didn't see > anything in /sys/kernel/config/cluster/. That folder did disappear during restart but I am not sure if the admin I was working with did an offline or a stop. We will do an offline during scheduled maintenance tomorrow. > 2. grep HEARTBEAT /etc/sysconfig/o2cb and paste here so that we know > the configuration file has been changed. elliott.per...@xxxxxxxxxxxx:~> grep HEART /etc/sysconfig/o2cb # O2CB_HEARTBEAT_THRESHOLD: Iterations before a node is considered dead. O2CB_HEARTBEAT_THRESHOLD=61 # O2CB_HEARTBEAT_MODE: Whether to use the native "kernel" or the "user" O2CB_HEARTBEAT_MODE="kernel" > 3. strace /etc/init.d/o2cb online and attach the output here. let's see > what's going on. > 4. cat /sys/kernel/config/cluster/ocfs2/heartbeat/dead_threshold to see > the new value. elliott.per...@xxxxxxxxxxx:~> cat /sys/kernel/config/cluster/XXXXXXX/heartbeat/dead_threshold 31 Thank you Tao, we will be performing maintenance on this cluster in the next couple days and will try these steps. Cheers, Elliott _______________________________________________ Ocfs2-users mailing list Ocfs2-users@oss.oracle.com http://oss.oracle.com/mailman/listinfo/ocfs2-users
