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Pentaho Documentation

Execute Transformations and Jobs on a Carte Cluster

Overview

Executing transformations and jobs on static and dynamic Carte clusters.

There are two types of Carte clusters.   Static Carte cluster has a fixed schema that specifies one master node and two or more slave nodes. In a static cluster, you specify the nodes in a cluster at design-time, before you run the transformation or job.

A Dynamic Carte cluster has a schema that specifies one master node and a varying number of slave nodes.  Unlike a static cluster, slave nodes are not known until runtime.  Instead, you register the slave nodes, then at runtime, PDI monitors the slave nodes every 30 seconds to see if it is available to perform transformation and job processing tasks.

Static clusters are a good choice for smaller environments where you don't have a lot of machines (virtual or real) to use for PDI transformations.  Dynamic clusters work well if nodes are added or removed often, such as in a cloud computing environment. Dynamic clustering is also more appropriate in environments where transformation performance is extremely important, or if there can potentially be multiple concurrent transformation executions.