Creating the replicated cache

Let's create a cache called employees, this cache will be used by the sample applications to share employee records across sites.

Configure cache in site-1

1. On the Data Grid operator page, select the Cache tab then Create Cache (Figure 7).
   

   Figure 7: Select Cache tab in Data Grid Operator.
2. Select the configure via: YAML view and use the content below as an example:

3. apiVersion: infinispan.org/v2alpha1
   kind: Cache
   metadata:
     name: employees
     namespace: rhdg-xsite
   spec:
     clusterName: dg
     name: employees
     template: |
       replicatedCache:
         mode: "ASYNC"
         statistics: "true"
         encoding:
           key:
             mediaType: "text/plain; charset=UTF-8"
           value:
             mediaType: "application/json; charset=UTF-8"
         locking:
           isolation: "REPEATABLE_READ"
           acquireTimeout: "0"
         expiration:
           lifespan: "600000"
           maxIdle: "300000"
         backups:
           site-2:
             backup:
               strategy: "SYNC"
               takeOffline:
                 minWait: "120000"
     updates:
       strategy: retain
   

4. Note: The above cache is configured to: 
   • Objects stored in the cache have a string key.
   •  Objects stored in the cache have the application/json format
   • Keep objects in the cache for a maximum of 10 minutes.
   • If the objects are not accessed for a period of 5 minutes, they will be removed from the cache.
   • Objects are replicated to the backup site, in this case to the cache configured on site-2.
5. Click Create.

Configure cache in site-2

1. Repeat step 1 shown for site-1.
2. For step 2, use the example below to create the cache, then select Create:

   apiVersion: infinispan.org/v2alpha1
   kind: Cache
   metadata:
     name: employees
     namespace: rhdg-xsite
   spec:
     clusterName: dg
     name: employees
     template: |
       replicatedCache:
         mode: "ASYNC"
         statistics: "true"
         encoding:
           key:
             mediaType: "text/plain; charset=UTF-8"
           value:
             mediaType: "application/json; charset=UTF-8"
         locking:
           isolation: "REPEATABLE_READ"
           acquireTimeout: "0"
         expiration:
           lifespan: "600000"
           maxIdle: "300000"
         backups:
           site-1:
             backup:
               strategy: "SYNC"
               takeOffline:
                 minWait: "120000"
     updates:
       strategy: retain

Our cluster is now configured with a cache capable of replicating data between different OpenShift clusters.