Hi Stijn You need to provide some more details on the type and duration of the waiters before the group can offer some advice. Bob Oesterlin Sr Principal Storage Engineer, Nuance On 6/6/17, 2:05 AM, "gpfsug-discuss-bounces at spectrumscale.org on behalf of Stijn De Weirdt" <gpfsug-discuss-bounces at spectrumscale.org on behalf of stijn.deweirdt at ugent.be> wrote: but we are wondering if and how we can cause those waiters ourself, so we can train ourself in debugging and resolving them (either on test system or in controlled environment on the production clusters). all hints welcome. stijn _______________________________________________