# Distributed Scheduling ## About In Spring Boot, if we need to execute tasks at a scheduled time, we can use **@Scheduled** annotation. However, if there are multiple instances of the application and if we want to ensure that a scheduled task runs only once across all instances, in such case we need distributed scheduling. There are different libraries that support distributed scheduling such as **ShedLock** , **Quartz** , **Akka Scheduler** etc. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://www.pranaypourkar.co.in/the-programmers-guide/spring/spring-features/spring-scheduling/distributed-scheduling.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.