Scaling the Db2 Data Gate instance

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You can scale the Db2 Data Gate instance from small to large.

Procedure

Before making changes, review the System requirements.

Choose the size of the instance according to this table (e.g., from small to medium, or NIL to large. The default level is CUSTOM. Size is NIL when you provision the instance from the UI.)

Level	Size	Description
level_1	small_mincpureq	2 vCPUs +16 GB Memory
level_2	small	2 vCPUs +16 GB Memory
level_3	medium	6 vCPUs +24 GB Memory
level_4	large	10 vCPUs +32 GB Memory
level_5	large	10 vCPUs +32 GB Memory

Log in to your Red Hat® OpenShift® cluster as an instance administrator:
```
oc login ${OCP_URL}
```
Change to the project where Db2 Data Gate is installed:
```
oc project ${PROJECT_CPD_INST_OPERANDS}
```
From the command line of the Red Hat OpenShift cluster where Db2 Data Gate is installed, identify the Db2 Data Gate instance identifier by issuing the oc get dginstance command. For example:
```
oc get dginstance -n ${PROJECT_CPD_INST_OPERANDS}
NAME                 VERSION   BUILD      STATUS      RECONCILED   AGE
dg1699914520773847   5.0.0     5.0.0.82   Completed   5.0.0        6h58m
```
In this example, the instance name is dg1699914520773847.

Identify the current scale configuration (the default scale level is CUSTOM).

cpd-cli manage get-scale-config --cpd_instance_ns=${PROJECT_CPD_INST_OPERANDS} --components=datagate_instance

Create an override.yaml file to specify the Db2 Data Gate instance need to be scaled. Update according to the results in step 5.
```
override_components_meta:
  datagate_instance:
    cr_name: <datagate instance name>
```

Put the override.yaml file into the workspace of CPD_CLI.

cp override.yaml ${CPD_CLI_MANAGE_WORKSPACE}/olm-utils-workspace/work

Specify the scale_level according to the table in step 2, and then run the scale command.

cpd-cli manage apply-scale-config --cpd_instance_ns=${PROJECT_CPD_INST_OPERANDS} --components=datagate_instance --scale=<scale_level> --param-file=/tmp/work/override.yaml

Wait for the pod to be ready.

oc get po -n ${PROJECT_CPD_INST_OPERANDS} | grep <datagate instance name>