Expanding Capacity of Cluster System Nodes

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Experiment name: Expanding Capacity of Cluster System Nodes of IBM Spectrum NAS

Experiment content:
The scalability is fully considered in the design of IBM Spectrum NAS: the average performance of cluster can be improved linearly by adding more storage nodes. All the resources in the storage cluster, including CPU, bandwidth, storage capacity and cache, can be full converged to provide high throughput for lots of concurrent users. Adding more nodes helps enhance the throughput while increasing cache helps reduce latency. The more the nodes in the cluster are, the less the time needed to complete a task is. This experiment will lead you to get through how to add 2 nodes to a four-node NAS cluster system to form a six-node NAS cluster system. (duration: 15-20min)

Experiment resources:
IBM Spectrum NAS 1.7.0 software
VMware vSphere 6.5
- CenterOS 7 (VM)
- Windows Server 2008 R2 (VMs)

Expanding Capacity of Cluster System Nodes of IBM Spectrum NAS

The following content is displayed on the same screen for your experiment so that you can make any necessary reference in experiment. Start your experiment now!

  1. Log onto the Management Interface(Duration: 5 min)
    After entering the management interface of IBM Spectrum NAS, click Storage clusters in the left-hand navigation bar, and the information of the two unconfigured nodes will be displayed at the right, which are also the two nodes to be added.

    In the left-hand navigation bar, select IBM-NASDemo1, and the system will prompt you to type the cluster password; type Passw0rd! and click OK to enter the cluster management interface.

    In the left-hand navigation bar, select IBM-NASDemo1, and the information of the configured nodes of current cluster will pop up. Four nodes are configured for current NAS cluster, and the total disk capacity is 200G.
  2. Configure and add new nodes(Duration: 10 min)
    At the left-hand navigation bar, select Storage clusters to return to the node configuration interface. Click any node at the right, then select "Configure node". Next, we will add this node to current cluster.

    Now, the wizard will pop up. In the wizard page 1: Select Cluster, Click "Next" to enter the next configuration page.

    In the wizard page 2: Configure management network,
    Select ens192 as the management interface.
    Management IP: 192.168.170.205
    Netmask: 255.255.255.0 (note that there are three 255 here)
    DNS: 192.168.170.120
    Default Gateway: 192.168.170.1
    Click "Next" to enter the next configuration page.

    In the wizard page 3: Configure private network,
    Select ens224 as the Private network interface.
    Set the Private IP as 192.168.100.205.
    Netmask: 255.255.255.0 (note that there are three 255 here)
    Click "Next" to enter the next configuration page.

    In the wizard page 4: Upload new software, click Skip to skip the microcode upgrade step.

    In the wizard page 5: Select disks
    At the left disks, drag the disk 0:0:1:0 into the Cache column, which will be used as the cache; drag the remaining disks into the Storage data column, which will be used as the storage disks (Tips: you can use Shift or Ctrl to select more than one disks quickly); check the option Enable storage disk write cache, drag the disk(s) from left window to the right window to complete the setup.

    In the wizard page 6, click Done. By now, you have added the node GINASNode6 into the cluster.

    Wait for several minutes until the node is added successfully, and now, you will see in the management interface that the NAS cluster consists of 5 nodes.

    Next, add the node G1NASNode5 into the NAS cluster as per the same steps mentioned above and by following the IP address plan given below.

    Then, you will see the information of six nodes in the management interface. The total capacity of the whole cluster is expanded from 200G to 300G.
  3. Configure the newly-added node with Public IP(Duration: 5 min)
    In the NAS management interface, click Config –>Network –>Networks, then click NAS_Public under the option Public, select ens256 as the port for the interfaces of newly-added Node5 and Node6, and click Apply to confirm these configurations. (Tips: If the information displayed at the right is incomplete, please restart the management software with the password Passw0rd!)

    In the popping menu, select "Yes, I confirm!" and then click "Confirm".

    In the page Summary of actions, click Confirm and Close in turn.

    Select Config –>Network –>File systems, click nasdemo to add host names and Public IPs for newly-added Node5 and Node6 as shown in the figure below, and then click Apply to confirm these configuration.

    In the popping menu, select "Yes, I confirm!" and then click "Confirm".

    In the page Summary of actions, click Confirm and Close in turn.

    By now, you have expanded the capacity of NAS cluster nodes.
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This experiment needs to be performed on PC side. Please turn to the PC side for experiment.

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