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 start a software service instance.

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

If you issue a command to start an already running service, then the command completes successfully but it has no effect.

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

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

  To identify the service instance you want to start 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:

    • cellsrv: Specifies the core Exadata cell services (CELLSRV, MS, and RS).

    • 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 service.

    • bsw: Specifies the block store worker 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 start an Exascale storage service on an Exadata compute server, the command syntax is:

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

  To identify the service instance you want to start 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).