2.2.1.8 Disable a Service

Exascale system components are implemented using a series of software services.

Typically, the Exascale cluster automatically contains the required Exascale storage services. However, as an Exascale administrator, you may occasionally need to disable a software service instance.

To disable an Exascale storage service, use the ESCLI chservice command with the --disable option.

A disabled service instance is stopped and prevented from automatically restarting on the associated server. To enable a disabled service instance, you must start it manually.

• To disable an Exascale storage service on an Exadata storage server, the command syntax is:

  @> chservice --attributes name=service_cell --disable

  To identify the service instance you want to disable on an Exadata storage server, specify the name attribute using the format: name=service_cell.

  In the attribute value:

  • service: Specifies the service that you want to act on, which is one of the following:

    • egs: Specifies the Exascale cluster service, also known as Exascale global service (EGS).

    • ers: Specifies the Exascale control service, also known as Exascale RESTful service (ERS).

    • syseds: Specifies the system vault manager service.

    • usreds: Specifies the user vault manager service.

    • bsm: Specifies the block store manager (BSM) service.

    • bsw: Specifies the block store worker (BSW) service.

  • cell: Specifies the name of the storage server (cell) that hosts the service.

    The cell must be identified by its name. Use the lscell command to find all cell names.

• To disable an Exascale storage service on an Exadata compute server, the command syntax is:

  @> chservice --attributes name=service_compute --disable

  To identify the service instance you want to disable on an Exadata compute server, specify the name attribute using the format: name=service_compute.

  In the attribute value:

  • service: Specifies the service that you want to act on, which is one of the following:

    • egs: Specifies the Exascale cluster service, also known as Exascale global service (EGS).

    • bsw: Specifies the block store worker service.

  • compute: Specifies the name of the compute server (dbserver) that hosts the service.

    Depending on the required service location, specify either the name of a specific compute node virtual machine (VM) or the Exadata compute node host domain (KVM host or Dom0). Use the lscomputeserver command to display information about compute servers associated with the Exascale cluster.

You can also add the --force option to forcibly disable the service, even if the server hosting the service is unavailable.