Administration guide > Configure the deployment environment > Configuring deployment policies
Controlling shard placement with zones
Zones give you control over shard placement in WebSphere eXtreme Scale. Zones are a logical, user-defined concept used to represent logical groupings of physical servers.
- Use zones for effective shard placement
Zones give you control over shard placement in eXtreme Scale. Zones are a logical, user-defined concept used to represent logical groupings of physical servers. The following are examples of different types of zones: different blade servers, chassis of blade servers, floors of a building, buildings, or different geographical locations in a multiple data center environment. Another use case is in a virtualized environment where many server instances, each with a unique IP address, run on the same physical server.
- Zone-preferred routing
With zone-preferred routing, you can define how eXtreme Scale directs transactions to zones.
- Define zones for containers
Zones are collections of container servers. A container server can belong to at most one zone. A container server is assigned to a zone when it starts.
- Zone definition examples for deployment file
You can specify zones and zone rules using the deployment policy descriptor XML file.
- View zone information with xsadmin
Use the xsadmin sample utility to view information about the current zone deployment, including shard placement data.
Parent topic:Configure deployment policies
Configure failover detection
Configure distributed deployments
Deployment policy descriptor XML file