2.2.1.9 Administer Client Services

In addition to the Exascale storage services, further client-side services provide support for specific Exascale functions on the Exadata compute nodes.

By default, the following client-side service instances are configured on each Exascale compute node:

• Exascale Node Proxy (ESNP)

  In a bare-metal configuration, ESNP runs on the server operating system. In a configuration with compute nodes running on virtual machines (VMs), ESNP runs inside the guest VMs.

• Exascale Direct Volume (EDV)

  This service is required on all Exadata compute nodes where you want to use EDV devices. In a bare-metal configuration, the EDV service runs on the server operating system. In a configuration with compute nodes running on virtual machines (VMs), the EDV service runs in the KVM host to provide the hypervisor access to VM image files based on EDV-managed storage. The EDV service also runs in each guest VM to enable direct access to EDV-managed storage from inside the VM.

To administer the client-side services, use the ALTER DBSERVER command in the Oracle Exadata Database Machine Command-Line Interface (DBMCLI).

The relevant command syntax is:

DBMCLI> ALTER DBSERVER { STARTUP | SHUTDOWN | RESTART } SERVICES { ESNP | EDV }

To display the status of the client-side services, use the DBMCLI LIST DBSERVER command.