# Application Overview
The architecture diagram of the IoT time series database Apache IoTDB is shown above. It covers the life-cycle data management functions such as collection, storage, query, analysis, and visualization of time series data. The gray part is the IoTDB component.
# Introduction to IoTDB architecture
As shown in the following figure , IoTDB uses a client-server architecture.
The server mainly includes a query engine that processes all user requests and distributes them to the corresponding management components, including the data writing layer, data query, schema management, and administration modules.
# System Tools
IoTDB is connected with big data systems.
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