Using Infinispan as a storage solution through the Caching service

Required roles: system administrator, security administrator

You can configure Infinispan as a storage solution through the Caching service, as well as configure Infinispan for high availability to replicate data to provide data durability and availability.

• Using Infinispan as a storage solution through the Caching service
  • Understanding Infinispan
    • Infinispan replica instances
  • Infinispan configuration

Understanding Infinispan

Infinispan is a storage solution that stores data structures in key-value pairs. The API Caching service uses hash sets, where each service storing data via the Caching service has its own hash, and each data entry is a key-value entry within that service's Infinispan hash set.

For more information on Infinispan, see the official Infinispan documentation.

Infinispan replica instances

Infinispan can be used with both a standalone instance and high availability mode. When using multiple Caching Service instances, it is necessary to specify all of the cluster nodes (members). Each Infinispan node is bound to a specific Caching Service instance and runs on a different port and host, which can be configured. For more information about configuring multiple Infinispan modes, see the Infinispan configuration.

For more information on Infinispan replication and how to configure a replica instance, see the Infinispan Cross-site Replication documentation.

Infinispan configuration

Configure Infinispan as a storage solution through the Caching service by setting the following configuration parameters in the zowe.yaml.

• zowe.components.caching-service.storage.infinispan.initialHosts

  This property specifies the list of cluster nodes (members). In case of multiple instances, the value for each Caching Service instance can be either a list of all the members, separated by a comma, or just the replica. The format is ${haInstance.hostname}[${zowe.components.caching-service.storage.infinispan.jgroups.port}].

• zowe.components.caching-service.storage.infinispan.persistence.dataLocation

  The path where the service keeps its data files for the Infinispan Soft-Index Cache Store. The default value is data. If you run the Caching Service in HA and the instances use the same filesystem, you have to specify a different value of the data property for each instance. For more information, see the Soft-Index File Store.

• zowe.components.caching-service.storage.infinispan.persistence.indexLocation

  The path where the service keeps its index data for the Infinispan Soft-Index Cache Store. The default value is index. If you run the Caching Service in HA and the instances use the same filesystem, you have to specify a different value of the index property for each instance. For more information, see the Soft-Index File Store.

• zowe.components.caching-service.storage.infinispan.jgroups.port

  (OPTIONAL)The default value is 7098. The port number used by Infinispan to synchronise data among cahing-service instances.

• zowe.components.caching-service.storage.infinispan.jgroups.host

  (OPTIONAL)The default value is taken from zowe hostname. The hostname used by Infinispan to synchronise data among cahing-service instances.

• zowe.components.caching-service.storage.infinispan.keyExchange.port

  (OPTIONAL)The default value is 7118. The port number used by Infinispan to exchange encryption key among cahing-service instances.

  Example of Caching service HA configuration using Infinispan:

  haInstances:
    lpar1:
      components:
        caching-service:
          storage:
            mode: infinispan
            infinispan: 
              initialHosts: lpar2[7098]
              persistence:
                dataLocation: /global/zowe/workspace/caching-service/data01
                indexLocation: /global/zowe/workspace/caching-service/index01
    lpar2:
      components:
        caching-service:
          storage:
            mode: infinispan
            infinispan: 
              initialHosts: lpar1[7098]
              persistence:
                dataLocation: /global/zowe/workspace/caching-service/data02
                indexLocation: /global/zowe/workspace/caching-service/index02