Database Reference
In-Depth Information
Figure 7-6
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The Titan ecosystem
Basic Concepts
In this section, we'll introduce some basic concepts that are important for understand-
ing Titan graph databases.
Vertex-Centric Indices
A vertex-centric index is specific to a vertex. Most traversal among referencing or non-
referencing vertices would be via edges or their properties. Indexing such properties or
edge labels can avoid performance overhead. Such indices can also be referred to as
local indices. The purpose of vertex-centric indices is to sort and index adjoining edges
of a vertex based on an edge's properties and labels.
Titan also provides support for Elasticsearch, which can be run in standalone or
embedded mode with Titan. With Elasticsearch it is also possible to perform full text
