François Thiebolt Aurélien Ortiz Abdelaziz Mzoughi VisageFS Translucent Directories: Efficient Posix Consistencies for Wide-Area Workflows. 36-43 2009 PDP http://dx.doi.org/10.1109/PDP.2009.26 conf/pdp/2009 db/conf/pdp/pdp2009.html#ThieboltOM09