Hi,
IHAC with an OCFS2 1.4 2-node cluster in RedHat 5.3 x86-64.
Basically for explanation simplicity the software uses the cluster for writing
in a log file up to 500Mb size, among other things (file read, etc)
Last monday there was a problem somewhere (software is a two-node application
server) that caused the software to hang, and it seems both application servers
was waiting each other for writing. Just restarting the application servers, the
hypothetical deadlock was resolved.
Question: Is ocfs2 capable to detect the deadlock and fence one of the nodes in
this situation?
The configuration is:
# 2010-02-10: OCFS2 cluster-aware filesystem configuration
kernel.panic_on_oops = 1
kernel.panic = 30
?
[oracle at mapcms1 ocfs2]$ /etc/init.d/o2cb status
Driver for "configfs": Loaded
Filesystem "configfs": Mounted
Driver for "ocfs2_dlmfs": Loaded
Filesystem "ocfs2_dlmfs": Mounted
Checking O2CB cluster ucmcluster: Online
Heartbeat dead threshold = 31
Network idle timeout: 30000
Network keepalive delay: 2000
Network reconnect delay: 2000
Checking O2CB heartbeat: Active
Regards
