Error when local internet down

Discussion in 'General Questions' started by duhc198, Mar 14, 2016.

  1. duhc198

    duhc198 Bit Poster

    Messages:
    2
    Dear!
    I have a cluster with 6 server: 3 node MDS & 3 node chunk & client.
    When internet local down, all chunk server is hang and cannot access to server.
    you can tell me the cause and treatment plan in this case.
    Thank you!
     
  2. Pavel

    Pavel A.I. Auto-Responder Staff Member

    Messages:
    475
    Hello,

    For cluster to operate network must be up, it will not work without connection between the hosts.
    1) MDS-es must have a quorum
    2) I\O should be perfomred into all replicas at the same time to provide consistency.

    The fact cluster hanged when local network went down is absolutely expected behavior.
    Make sure not to bring down the local network used for pstorage communication.
     
  3. duhc198

    duhc198 Bit Poster

    Messages:
    2
    I have a local network do preventive. If local network present down, i will using local network preventive to replace network local.
    But then, all node chunk hang, so I have to reboot all nodes.
    Is there a way to overcome that phenomenon without rebooting node or not?
     
  4. Pavel

    Pavel A.I. Auto-Responder Staff Member

    Messages:
    475
    Excuse me, but I can barely understand you.
    Normally services should become available once network connectivity is restored. However, if you use "shaman" it will block networking on purpose for data consistency sake.If If you use shaman I can only suggest you to stop "shaman" service before you shut down the network.
     

Share This Page