I'm curious about LU-4185. To recap, when a user attempts to create a directory which exists when do they do not have permission to do so, standard behavior is to return -EEXIST - Not -ENOPERM. (I am not sure if this is POSIX, but it is standard on other file systems) Depending on the state of the client cache, Lustre will sometimes return ENOPERM. Not only is this non-standard behavior, it seems very undesirable that the value returned for an operation in a directory would change depending on whether or not you've read the directory contents recently. This was brought up some time ago, and the fix (http://review.whamcloud.com/#/c/8257/) stalled because it would harm open/create performance. It would be nice to have this addressed: Is this issue that Intel expects to fix, either in the way of the patch above, or some other way, or is this a minor divergence from POSIX that Intel's planning to keep in order to achieve better performance? Thanks, - Patrick Farrell