Build server polling vs. event-driven builds

Posted by Daniel T. on Stack Overflow See other posts from Stack Overflow or by Daniel T.
Published on 2010-06-16T19:24:52Z Indexed on 2010/06/16 19:32 UTC
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Filed under:

svn

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build-process

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hudson

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build-server

Why do build servers poll for changes instead of SVN firing off an event (or a post-commit step) that tells the build server to start a build? It seems terribly inefficient to poll for changes, especially when the number of projects increases and the polling period is set to a very low value (for example, 30 seconds).

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