Implemented first round of issue #338 (cluster write performance)
Implemented first round of issue #338 (cluster write performance)

meteo-ubonn/meanie3D,meteo-ubonn/meanie3D,meteo-ubonn/meanie3D,meteo-ubonn/meanie3D,meteo-ubonn/meanie3D,meteo-ubonn/meanie3D