Planning the topology
With WebSphere® eXtreme Scale, your architecture can use local in-memory data caching or distributed client-server data caching. The architecture can have varied relationships with your databases. You can also configure the topology to span multiple data centers.
WebSphere eXtreme Scale requires minimal additional infrastructure
to operate. The infrastructure consists of scripts to install, start, and stop a Java™ Platform, Enterprise
Edition application on a server. Cached data is stored in the
container servers, and clients remotely connect to the server.
In-memory environments
When you deploy in a local, in-memory environment, WebSphere eXtreme Scale runs within a single Java virtual machine and is not replicated. To configure a local environment you can use an ObjectGrid XML file or the ObjectGrid APIs.Distributed environments
When you deploy in a distributed environment, WebSphere eXtreme Scale runs across a set of Java virtual machines, increasing the performance, availability and scalability. With this configuration, you can use data replication and partitioning. You can also add additional servers without restarting your existing eXtreme Scale servers. As with a local environment, an ObjectGrid XML file, or an equivalent programmatic configuration, is needed in a distributed environment. You must also provide a deployment policy XML file with configuration detailsYou can create either simple deployments or large, terabyte-sized deployments in which thousands of servers are needed.