Configure Node Properties

You can configure the node properties from EXAoperation in the following situations: 

  • When adding a new node. Refer to Add Node(s) for additional information.
  • When editing a node.

Editing Node Properties

Do the following to change the node properties:

  1. Log in to EXAoperation.
  2. Select Configuration > Nodes
  3. Select a node and click Edit.
  4. Change the Node Properties and click Save.

Node Properties

The below table contains a list of properties that you can configure for a node.

Node Property Description
Disk Devices

Add the disk devices the node will use. If you do not enter disk devices, the default set in the Default Disk Configuration tab is used.

Disk RAID Select the RAID setup of the disks.
RAID 10 Redundancy Required only if 'RAID 10' is selected in the Disk RAID field. This sets the number of copies of each datablock on the RAID 10 arrays.
External Number

External ID of the node. This value determines the last octet of the node's IP address within the public network (Client-Side Communication Network). This is done by adding the External Number assigned to the node to the last octet of the public network IP address.


Client-Side Network Address + External Number = Client-Side Node IP Address

Spool Disk

The spool disk is used for storing database log files and coredumps (ext4 filesystem). Usually this is set to 'd02_data'.

MAC Private LAN

Interface MAC address for the private network (CICN).

Exasol uses dummy mac addresses for cloud installations.

MAC Public LAN

Interface MAC address for the public network (CSCN).

Exasol uses dummy mac addresses for cloud installations.

Install Node

If this option is checked, the node will be installed when it is started.

If a node is rebooted or started with the Install Node flag set, all existing data on the node will be deleted.

Wipe Disks

Wipes data from disks if selected.

Force Filesystem Check

Forces a filesystem check on the next boot of the node.

Force no Filesystem Check

Skips a filesystem check on the next boot of the node.

Use 4 KiB Sectors for Disks The sector size to use on the disks.
Label Optional. A label for the node.

Specify OS Memory Swap for Cluster Node(s)

Exasol recommends setting at least 10% of the RAM as OS memory. This memory is used by the operating system in case it runs out of memory for some processing. The memory you specify as OS memory is always reserved for the operating system and cannot be used by the database. Before you specify the OS memory, you can always check the total available physical memory for each node of the cluster from Configuration > Nodes > Cluster Nodes in EXAoperation. For more information about it, see Information About Nodes.

Do the following to allocate RAM for the OS memory:

  1. Log in to the EXAoperation with administrator credentials.
  2. Navigate to Configuration > Network.
  3. In the OS Memory/Node (GiB), specify the value that will be reserved as the OS memory.
    This memory allocation is applied for all the nodes. For example, if you specify 4 GiB in this field, each node in the cluster will have 4GiB RAM reserved as OS memory.
  4. Click Add.