Creating a cluster

Create a cluster and add multiple nodes to provide shared storage.

  1. Create a cluster.
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    essrun -N <IOnodeclasses> cluster --suffix=-hs
    End of change
    Start of changeWhere the I/O node classes can be similar to the ones in the following examples:
    • IBM Storage Scale System 3000: ess30001a and ess30001b
    • IBM Storage Scale System 3500: ess35001a and ess35001b
    • IBM Storage Scale System 6000: ess60001a and ess60001b
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    Tip: Use the optional parameters of the essrun command to customize your clusters.

    For more information, see essrun command in the IBM Storage Scale Systems Command Reference.

  2. Add a management server node to the cluster. 
    essrun -N <IOnode1> cluster --add-ems <MS1> --suffix=-hs
  3. Create a file system.
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    essrun -N ess3500_x86_64 filesystem --name fs1 --suffix=-hs
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    Tip: Use the optional parameters of the essrun command to customize your file systems.

    For more information, see essrun command in the IBM Storage Scale Systems Command Reference

    Note:
    • By default, this command attempts to use all the available space. If you need to create multiple file systems or a CES shared root file system for protocol nodes, consider by using less space. For example:Start of change
      essrun -N <IOnoden> filesystem --suffix=-hs --size 80%
      End of changeStart of changeFor more options such as blocksize, filesystem size, or RAID code, see the essrun command in the IBM Storage Scale System Command Reference.End of change
    • This step creates combined metadata + data vdisk sets by using a default RAID code and block size. You can use additional flags to customize or use the mmvdisk command directly for advanced configurations.
    • Start of changeIf you are updating IBM Storage Scale System 3000,Start of change IBM Storage Scale System 3200, and IBM Storage Scale System 3500End of change the default set-size is 80% and it must not be increased.Start of change If you are updating IBM Storage Scale System 5000, the default set-size is 100%.End of change For additional options, see essrun command. The default block size for PPC64LE is 16M whereas for IBM Storage Scale System 3000 it is 4M. End of change
    • Start of changeIf you are deploying protocol nodes, make sure that you leave space for CES shared root file system. Adjust the set-size slightly lower when you are creating this required file system for protocol nodes.End of change
    • For IBM Storage Scale System 3500, you must keep 1.5 TB or more space free if future capacity MES is planned (performance to hybrid). Thus, it is recommended to not use all available space when you create a file system for the performance model. The default allocation is 80% of available space when you use the essrun filesystem command (for x86 nodes).
    • Before you create a recovery group or a file system, check whether a self-encrypted drive (SED) is required. You cannot enroll recovery groups for the SED support after they are created.
  4. Add the protocol node to the cluster.

    For more information, see Creating a shared root file system for CES.

  5. Create a cesSharedRoot file system (if you are deploying protocols). 
    essrun -N <IOnode1>,<IOnode2> filesystem --ces
    For more information, see Adding and configuring protocols in an exiting cluster by using IBM Storage Scale installation toolkit.