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Single Node Architecture
A single node instance, as its name suggests, contains only one node and that node can be accessed directly.
As a supplement to the cluster and replica set architectures, the single-node architecture is useful for R&D, testing, and non-core data storage of enterprises. While not as robust as replica sets, single node architecture can be a less expensive way to visualize O&M and provide elastic scaling.
Figure 1 Single node architecture
Parent topic: System Architecture
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