Hi Karl- For sure you do NOT want to use SMB/CIFS. The locking mechanism is not robust enough.
Generally speaking, computer programs become unpredictable when disk volumes “just disappear”. I would recommend taking outages when the disk volume maintenance is being performed. -Matt Pavlovich > On Feb 15, 2022, at 2:30 PM, Nordstrom, Karl <k...@psu.edu> wrote: > > Hello ActiveMQ users, > > We have two hosts in each of our ActiveMQ v5.16.x clusters. > > They both NFS mount the following at boot time via /etc/fstab > /opt/local/apache-activemq-5.16.0/data/kahadb > /opt/local/apache-activemq-5.16.0/data/amq-prod-cluster > > The NFS mounts are provided by an EMC Isilon Scaled Out NAS. When they do > maintenace on the Isilon, they reboot one of the nodes at a time. All too > often this causes outages of our amq hosts. So, we stop activemq.service on > the broker in slave mode before the Isilon maintenace, but still sometimes > the amq nodes lose the NFS mounts. > > Are there recommended NFS mount parameters? > Can kahadb be auto mounted? > Is SMB an option? > > Here are the amq mount parameters: > > [kxn2@amq-p01 ~]$ cat /etc/fstab |grep nomad > > nomad-nfs.blue.psu.edu:/activemq_production > /opt/local/activemq/data/kahadb nfs rw,nosuid 0 0 > nomad-nfs.blue.psu.edu:/activemq_production > /opt/local/activemq/data/amq-prod-cluster nfs rw,nosuid 0 0 > > [kxn2@amq-p01 ~]$ sudo mount | grep nomad > nomad-nfs.blue.psu.edu:/activemq_production on > /opt/local/apache-activemq-5.16.0/data/kahadb type nfs4 > (rw,nosuid,relatime,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=172.24.62.22,local_lock=none,addr=10.136.49.89) > > nomad-nfs.blue.psu.edu:/activemq_production on > /opt/local/apache-activemq-5.16.0/data/amq-prod-cluster type nfs4 > (rw,nosuid,relatime,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=172.24.62.22,local_lock=none,addr=10.136.49.89) > > Thanks in advanced > > --- > > Karl Nordström > > Systems Administrator > > Penn State IT | Application Platforms
