Abstract: The disclosure is directed to a data publishing service that provides a low-latency read access to data. Some applications store data in a format that is not suitable or efficient for retrieving the data in real-time or near real-time. The data publishing service converts the data into a format, e.g., key-value pairs, that provides a low-latency read access to the data. A low-latency read access is a feature that enables retrieval of data in real-time, near real-time, or within a specified read latency. The data publishing service also provides an application programming interface (API), which can be used by a client for accessing the data. The data publishing service can be used to provide low-latency read access to data stored in data sources of various storage formats, e.g., data stored in relational database, log files, or as objects in object-oriented databases.