21 Replies Latest reply: Oct 8, 2017 5:04 AM by Rohit Kumar RSS

    Can a failover node work as scheduling node

    Rohit Kumar

      Hi,

      I have configured a failover node and now I need to configure one node which will handle reloading tasks, My Questions is , Can I use the same Failover node as reloading node , If yes , how ? As reloading node need to set SLAVE and if I set it to SLAVE on central and on the time when my central node stop working , will it automatically set to MASTER and SLAVE which manage and reload the tasks ?

        • Re: Can a failover node work as scheduling node
          Vincenzo Esposito

          From the September 2017 release you can set up a RIM node as candidate master. If the master node fails the RIM node replaces it, so also the scheduler will change from slave to Master/Slave.

          In previous release you need to guarantee the Master HA for Slaves Scheduler to work

            • Re: Can a failover node work as scheduling node
              Rohit Kumar

              It means, when I add a new node and select the Failover Candidate and then I can use the same node for reloading purpose, by going to schedulers , and change its Type to Master and when it central node get failed, my Rim node type will change to MASTER and SLAVE automatically and it will works as central node which can do the reloads ?

                • Re: Can a failover node work as scheduling node
                  Rohit Kumar

                  See what I am trying to do, I have a central node and one RIM node which is working as a failover node. Now I need to add one more node for reloading purpose, here I am trying to use failover node as reloading node too  so I donot need to add one more node for only reloading purpose.

                  I ca say I am, trying to use utilize failover node in more ways.

                • Re: Can a failover node work as scheduling node
                  Rohit Kumar

                  Hi Viencezo,

                  Can you please explain in detail

                  scheduler will change from slave to Master/Slave

                  ?

                  I have one Central node, one Failover node and one Scheduler node. I have settled , Central Node as MASTER only, Failover node as SLAVE only and Scheduler node to SLAVE only.


                  As you have said, when my Central node will get down, My failover node type will change automatically to MASTER only and Scheduler node will communicate to Failover node and reload will continue , Please correct me if I am wrong

                    • Re: Can a failover node work as scheduling node
                      Vincenzo Esposito

                      Hi Rohit,

                      What I said is from the September 2017 release you can select an "Alternative Master Node". An alternative master node need to have all services (as the real master node). It work on a polling base system (by default each 10 min) check whether the master is on-line and in case of fails it replaces the master node. As result also the Scheduler on this node acts as Master.


                      Hope is more clear, if not don't hesitate to ask more details 

                        • Re: Can a failover node work as scheduling node
                          Rohit Kumar

                          As I have configured one RIM node and on the time of adding to central node, I have selected Failover candidate which made it select all the services automatically.

                          But when I went to scheduler option and open my this new node, the type was there SLAVE, so as per your suggestion , I am making it MASTER, for now, There are two master type nodes in my  qlik site, Central Node and Failover node

                           

                          Please correct me if I am wrong somewhere

                      • Re: Can a failover node work as scheduling node
                        Rohit Kumar

                        Hi Vincenzo,

                         

                        One Quick Question: Lets say I have one central node and One failover node, and my central node got down completely, after 10 minutes , Failover node takes charge and start severing applications, I wana know, when we make any node as failover node, Do it replicates apps and rest data to failover node from central node ??

                        when our failover node is charge which address in URL bar our client need to put, Central or failover ??

                      • Re: Can a failover node work as scheduling node
                        Vincenzo Esposito

                        The rule "ResourcesOnNonCentralNodes"  make (as the description) "All resources need to be accessible on the non-central nodes, except the monitoring apps". This means resources will be shared across all other nodes. If you disable it you expect to use only the central node. Actually, you can't deny having resource on the central node due to  the first rule "ResourceOnTheCentralNode" which is ReadOnly therefore unmodifiable.  

                        try to create a new Balancing rule as:

                        ((node.name="<RIM>" and resource.id="<APP_ID>"))