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Home/Magazine Archive/November 2020 (Vol. 63, No. 11)/Data on the Outside versus Data on the Inside/Abstract

Practice

Data on the Outside versus Data on the Inside

By Pat Helland
Communications of the ACM, November 2020, Vol. 63 No. 11, Pages 111-118
10.1145/3410623
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digital code moving through open door, illustration — Credit: Getty Images

Recently, there has been a lot of interest in services. These can be microservices or just services. In each case, the service provides a function with its own code and data and operates independently of partners. This article argues that there are a number of seminal differences between data encapsulated inside a service and data sent into the space outside of the service boundary.

SQL data is encapsulated within a service to ensure it is protected by application code. When sending data across services, it is outside that trust boundary.

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