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Note that the way this option works is to make a completely clean copy of the entire webapp into a private "temp" directory whenever it detects a redeploy. This in theory will slow up deployment and chew up disk space, but in practice on modern machines the delay is barely noticeable, even when deploying bulky webapps.
Don't forget to look into $CATALINA_HOME/temp and clean it out from time to time, since the same resource locking issues prevent Tomcat from being able to delete stale versions of your webapps.
Warning | |||
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You should NOT turn this option on in production. |