H5P an GlusterFS

Is anyone out there successfully using H5P on Drupal 7 with GlusterFS?  The loading and saving performance of some of the more complex content types such as Course Presentation and Column are astonishingly poor for us and I would be keen to know if anyone is having success with this type of setup?

At the moment is can take over 20 seconds to load a single slide Course Presentation (with nothing on the slide) and an astounding 2+ minutes to save the node during creation/editing process. Similar figures for Column.

Simpler content type are much faster to load/save, but still much slower than any other operation in Drupal. 

We are using H5P module version 1.39 (although it is the same performance on earlier versions too).

Any help would be greatly appreciated.