[/map {"- map/map "}) [/map/topicref {"- map/topicref "}) [/map/topicref/topicmeta {"- map/topicmeta "}) [/map/topicref/topicmeta/navtitle {"- topic/navtitle "}) Introducing the Endeca Server Cluster (navtitle][/map/topicref/topicmeta/linktext {"- map/linktext "}) Introducing the Endeca Server Cluster (linktext][/map/topicref/topicmeta/shortdesc {"- map/shortdesc "}) This section introduces the concepts and capabilities of the Endeca Server Cluster and includes diagrams of data domains hosted in it. (shortdesc] (topicmeta][/map/topicref/topicref {"- map/topicref "}) [/map/topicref/topicref/topicmeta {"- map/topicmeta "}) [/map/topicref/topicref/topicmeta/navtitle {"- topic/navtitle "}) Overview (navtitle][/map/topicref/topicref/topicmeta/linktext {"- map/linktext "}) Overview (linktext][/map/topicref/topicref/topicmeta/shortdesc {"- map/shortdesc "}) This section discusses the Endeca Server Cluster and the data domain cluster, and describes the cluster concepts. (shortdesc] (topicmeta][/map/topicref/topicref/topicref {"- map/topicref "}) [/map/topicref/topicref/topicref/topicmeta {"- map/topicmeta "}) [/map/topicref/topicref/topicref/topicmeta/navtitle {"- topic/navtitle "}) Endeca Server Cluster (navtitle][/map/topicref/topicref/topicref/topicmeta/linktext {"- map/linktext "}) Endeca Server Cluster (linktext][/map/topicref/topicref/topicref/topicmeta/shortdesc {"- map/shortdesc "}) The Endeca Server cluster is a deployment of multiple Endeca Server instances that host and manage multiple clustered data domains. (shortdesc] (topicmeta] (topicref][/map/topicref/topicref/topicref {"- map/topicref "}) [/map/topicref/topicref/topicref/topicmeta {"- map/topicmeta "}) [/map/topicref/topicref/topicref/topicmeta/navtitle {"- topic/navtitle "}) Data domain cluster (navtitle][/map/topicref/topicref/topicref/topicmeta/linktext {"- map/linktext "}) Data domain cluster (linktext][/map/topicref/topicref/topicref/topicmeta/shortdesc {"- map/shortdesc "}) One or more data domain clusters can be hosted in a clustered Endeca Server deployment.This topic introduces the data domain cluster and describes its capabilities. (shortdesc] (topicmeta] (topicref][/map/topicref/topicref/topicref {"- map/topicref "}) [/map/topicref/topicref/topicref/topicmeta {"- map/topicmeta "}) [/map/topicref/topicref/topicref/topicmeta/navtitle {"- topic/navtitle "}) Building a cluster (navtitle][/map/topicref/topicref/topicref/topicmeta/linktext {"- map/linktext "}) Building a cluster (linktext][/map/topicref/topicref/topicref/topicmeta/shortdesc {"- map/shortdesc "}) This topic provides at-a-glance summary of high-level tasks required to deploy a data domain cluster hosted in the Endeca Server cluster. (shortdesc] (topicmeta] (topicref][/map/topicref/topicref/topicref {"- map/topicref "}) [/map/topicref/topicref/topicref/topicmeta {"- map/topicmeta "}) [/map/topicref/topicref/topicref/topicmeta/navtitle {"- topic/navtitle "}) Data domain cluster concepts (navtitle][/map/topicref/topicref/topicref/topicmeta/linktext {"- map/linktext "}) Data domain cluster concepts (linktext][/map/topicref/topicref/topicref/topicmeta/shortdesc {"- map/shortdesc "}) This topic introduces the terms used to describe data domain clusters — the leader and follower nodes, and the Cluster Coordinator. (shortdesc] (topicmeta] (topicref] (topicref][/map/topicref/topicref {"- map/topicref "}) [/map/topicref/topicref/topicmeta {"- map/topicmeta "}) [/map/topicref/topicref/topicmeta/navtitle {"- topic/navtitle "}) Cluster diagrams (navtitle][/map/topicref/topicref/topicmeta/linktext {"- map/linktext "}) Cluster diagrams (linktext][/map/topicref/topicref/topicmeta/shortdesc {"- map/shortdesc "}) Many scenarios of data domain clusters are possible — a single Endeca Server cluster can host one or more data domains.This section includes diagrams that illustrate the cluster topology. (shortdesc] (topicmeta][/map/topicref/topicref/topicref {"- map/topicref "}) [/map/topicref/topicref/topicref/topicmeta {"- map/topicmeta "}) [/map/topicref/topicref/topicref/topicmeta/navtitle {"- topic/navtitle "}) Diagram with a single data domain (navtitle][/map/topicref/topicref/topicref/topicmeta/linktext {"- map/linktext "}) Diagram with a single data domain (linktext][/map/topicref/topicref/topicref/topicmeta/shortdesc {"- map/shortdesc "}) The diagram in this topic illustrates a clustered Endeca Server deployment serving a single data domain cluster. (shortdesc] (topicmeta] (topicref][/map/topicref/topicref/topicref {"- map/topicref "}) [/map/topicref/topicref/topicref/topicmeta {"- map/topicmeta "}) [/map/topicref/topicref/topicref/topicmeta/navtitle {"- topic/navtitle "}) Diagram with multiple data domains (navtitle][/map/topicref/topicref/topicref/topicmeta/linktext {"- map/linktext "}) Diagram with multiple data domains (linktext][/map/topicref/topicref/topicref/topicmeta/shortdesc {"- map/shortdesc "}) The following diagram illustrates a clustered Endeca Server deployment serving multiple data domain clusters. (shortdesc] (topicmeta] (topicref] (topicref][/map/topicref/topicref {"- map/topicref "}) [/map/topicref/topicref/topicmeta {"- map/topicmeta "}) [/map/topicref/topicref/topicmeta/navtitle {"- topic/navtitle "}) Cluster behavior (navtitle][/map/topicref/topicref/topicmeta/linktext {"- map/linktext "}) Cluster behavior (linktext][/map/topicref/topicref/topicmeta/shortdesc {"- map/shortdesc "}) This section discusses the Endeca Server cluster behavior, and the data domain cluster behavior in various scenarios, such as data domain cluster startup, updates to the data domain index, and response to a data domain node failure.It also describes how the Endeca Server ensures enhanced availability of its query processing for data domains. (shortdesc] (topicmeta][/map/topicref/topicref/topicref {"- map/topicref "}) [/map/topicref/topicref/topicref/topicmeta {"- map/topicmeta "}) [/map/topicref/topicref/topicref/topicmeta/navtitle {"- topic/navtitle "}) Allocation of data domains (navtitle][/map/topicref/topicref/topicref/topicmeta/linktext {"- map/linktext "}) Allocation of data domains (linktext][/map/topicref/topicref/topicref/topicmeta/shortdesc {"- map/shortdesc "}) When you provision a new data domain, Endeca Server first determines whether it has sufficient capacity to host the data domain, and if yes, decides which nodes will host the Dgraph processes for the data domain.This topic summarizes the configuration parameters that affect these calculations, so that you, as a system administrator of the Endeca Server cluster can take them into account when configuring or administering your Endeca Server cluster. (shortdesc] (topicmeta] (topicref][/map/topicref/topicref/topicref {"- map/topicref "}) [/map/topicref/topicref/topicref/topicmeta {"- map/topicmeta "}) [/map/topicref/topicref/topicref/topicmeta/navtitle {"- topic/navtitle "}) Load balancing and routing of requests (navtitle][/map/topicref/topicref/topicref/topicmeta/linktext {"- map/linktext "}) Load balancing and routing of requests (linktext][/map/topicref/topicref/topicref/topicmeta/shortdesc {"- map/shortdesc "}) This topic discusses the load balancing and routing of external requests targeting different data domains hosted by the Endeca Server cluster. (shortdesc] (topicmeta] (topicref][/map/topicref/topicref/topicref {"- map/topicref "}) [/map/topicref/topicref/topicref/topicmeta {"- map/topicmeta "}) [/map/topicref/topicref/topicref/topicmeta/navtitle {"- topic/navtitle "}) Data domain cluster startup (navtitle][/map/topicref/topicref/topicref/topicmeta/linktext {"- map/linktext "}) Data domain cluster startup (linktext][/map/topicref/topicref/topicref/topicmeta/shortdesc {"- map/shortdesc "}) Once the Endeca Server cluster is started, it activates the Endeca data domain clusters it is hosting.This topic discusses the behavior of the data domain cluster at startup. (shortdesc] (topicmeta] (topicref][/map/topicref/topicref/topicref {"- map/topicref "}) [/map/topicref/topicref/topicref/topicmeta {"- map/topicmeta "}) [/map/topicref/topicref/topicref/topicmeta/navtitle {"- topic/navtitle "}) How updates are processed (navtitle][/map/topicref/topicref/topicref/topicmeta/linktext {"- map/linktext "}) How updates are processed (linktext][/map/topicref/topicref/topicref/topicmeta/shortdesc {"- map/shortdesc "}) In a data domain cluster, updates to the records in the index and updates to the configuration are routed to the Oracle Endeca Server that is hosting the leader node. (shortdesc] (topicmeta] (topicref][/map/topicref/topicref/topicref {"- map/topicref "}) [/map/topicref/topicref/topicref/topicmeta {"- map/topicmeta "}) [/map/topicref/topicref/topicref/topicmeta/navtitle {"- topic/navtitle "}) Role of the Cluster Coordinator (navtitle][/map/topicref/topicref/topicref/topicmeta/linktext {"- map/linktext "}) Role of the Cluster Coordinator (linktext][/map/topicref/topicref/topicref/topicmeta/shortdesc {"- map/shortdesc "}) The Cluster Coordinator provides configuration and state management and distributed coordination services to members of the Endeca Server cluster.It ensures high availability of the query processing provided by the nodes in the Endeca Server cluster and in the data domain clusters. (shortdesc] (topicmeta] (topicref][/map/topicref/topicref/topicref {"- map/topicref "}) [/map/topicref/topicref/topicref/topicmeta {"- map/topicmeta "}) [/map/topicref/topicref/topicref/topicmeta/navtitle {"- topic/navtitle "}) How enhanced availability is achieved (navtitle][/map/topicref/topicref/topicref/topicmeta/linktext {"- map/linktext "}) How enhanced availability is achieved (linktext][/map/topicref/topicref/topicref/topicmeta/shortdesc {"- map/shortdesc "}) This topic discusses how the Endeca Server cluster ensures enhanced availability of query-processing to the data domain clusters. (shortdesc] (topicmeta] (topicref] (topicref] (topicref] (map]