Add Nodes to a Cluster

You can extend a cluster by adding permanent Hadoop nodes, edge nodes, and cluster compute nodes.

See About Oracle Big Data Cloud Service Nodes for information about the different kinds of nodes.

Topics

• Adding Permanent Nodes To a Cluster

• Adding and Removing Cluster Compute Nodes (Bursting)

Adding Permanent Nodes To a Cluster

You can add additional permanent nodes to a cluster after it was created and started. Permanent nodes include permanent Hadoop nodes and edge nodes.

To add permanent nodes to a cluster:

1. The process is slightly different for metered and nonmetered subscriptions:

   • If you have a nonmetered subscription, contact an Oracle Sales Representative to extend your subscription by the number of permanent nodes you want to add. You don’t have to say how many will be used as permanent Hadoop nodes and how many as edge nodes yet. You’ll make that choice in the steps below.

     You’ll receive an e-mail notification when the nodes have been added to your subscription.

   • If you have a metered subscription, continue with the steps below. You cloud credits will be applied according to what you add.
2. Go to your Big Data Cloud Service Services page
3. Click the name of the cluster that you want to extend.
4. On the Service Overview page for that cluster, click at the top of the page, and select Extend/Shrink.
5. In the Extend/Shrink Service dialog box, enter your Cloudera administrator password, select how many of the extra nodes will be permanent Hadoop nodes and how many will be edge nodes, and then and click Extend.
   Four permanent Hadoop nodes are required before you can assign any additional nodes as edge nodes. For example, if your cluster has three permanent Hadoop nodes and you’ve purchased an entitlement to two more, you must allocate one as a permanent Hadoop node. You can then allocate the fifth node either as a permanent Hadoop node or an edge node. If your cluster already has four nodes and you purchase an entitlement to more nodes, you can allocate them as any combination of permanent Hadoop nodes and edge nodes.

When successful, the new status appears on the Service Overview page for the cluster..

Adding and Removing Cluster Compute Nodes (Bursting)

You can add and remove cluster compute nodes at any time. This is sometimes called “bursting.”

Cluster compute nodes have processing resources (OCPUs) and memory only, with no storage. That makes it possible to add them temporarily, when your processing needs increase, and delete them when you no longer need them.

You don’t have to contact an Oracle representative and you don’t have to purchase additional. entitlements. You’re charged only for the number of nodes you allocate and only for the time they exist in the cluster. See About Oracle Big Data Cloud Service Nodes.

To add cluster compute nodes to a cluster:

1. On the Services page of your console, click the Big Data Cloud Service link at the top of the page, and then select the service you want to update,..
2. From the , select Modify.
3. On the Modify Oracle Big Data Cloud Service page, find the Additional Number of OCPU (Cores) field. A message under the field shows the number of OCPUs currently assigned to this instance. This message shows 0 when you have no cluster compute nodes in use.

   An Oracle Compute Unit (OCPU) is a single core in the virtual CPU. There are 32 Oracle OCPUs in a single cluster compute node. When you make a choice to add or remove cluster compute nodes, you identify them by their number of OCPUs, The following are supported.

   • 32 OCPUs = 1 node

   • 64 OCPUs = 2 nodes

   • 96 OCPUs = 3 nodes

   • 128 OCPUs = 4 nodes

   • 160 OCPUs = 5 nodes

   • 192 OCPUs = 6 nodes

   • 224 OCPUs = 7 nodes

   • 256 OCPUs = 8 nodes

   • 288 OCPUs = 9 nodes

   • 320 OCPUs = 10 nodes

   • 352 OCPUs = 11 nodes

   • 384 OCPUs = 12 nodes

   • 416 OCPUs = 13 nodes

   • 448 OCPUs = 14 nodes

   • 480 OCPUs = 15 nodes

   1. To add OCPUs, enter a positive number, in increments of 32, up to a total of 480 OCPUs for the instance. Then click Next.
   2. To remove OCPUs, enter a negative number, in increments of 32, up to the number assigned to the instance. Then click Next.
4. On the Modify Instance Confirm page, review your changes and then click Modify to initiate the changes.

   After you’ve initiated this process is complete, you’ll receive an e-mail that says the nodes have been added to the instance.

   If you’re only adding cluster compute nodes, they’re added automatically to the cluster. If you’re also adding permanent nodes, you must select Extend/Shrink from the top menu on the cluster’s Service Overview page to add them all at the same time.