The current mechanism of shutting down a mini cluster through HBaseTestingUtility.shutDownMiniCluster can take a lot of time when the mini cluster almost has a lot of tables. A lot of this time is spent in closing all the user regions. It would be nice to have a mechanism where this shutdown can happen quickly without having to worry about closing these user regions. At the same time, this mechanism would need to make sure that all the critical system resources like file handles and network ports are still released so that subsequently initialized mini clusters on the same JVM or system won't run into resource issues. This would make testing using HBase mini clusters much faster and immensely help out test frameworks of dependent projects like Phoenix.