2.2.1.6 Stop 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 stop a software service instance.
Note:
By default, Exascale uses automatic service placement to ensure that the required storage services are available across the Exascale cluster. Consequently, if you manually stop a software service instance (as described below), a replacement service instance is automatically started on another node (if possible).
To stop an Exascale storage service, use the ESCLI chservice
command with the --stop
option.
If you issue a command to stop service that is not running, then the command completes successfully but it has no effect.
-
To stop an Exascale storage service on an Exadata storage server, the command syntax is:
@> chservice --attributes name=service_cell --stop
To identify the service instance you want to stop 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 stop an Exascale storage service on an Exadata compute server, the command syntax is:
@> chservice --attributes name=service_compute --stop
To identify the service instance you want to stop 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).
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Parent topic: Administer Exascale Services