I'm trying to solve poor performance of my web site. My webserver root is on a glusterfs mount; I'm using jMeter to do the load testing. When I send a single request, the servers handles it in about 300ms. When doing 200 concurrent connections: - from a regular folder, the request takes between 1700 and 2000ms - from a glusterfs local mount, the request times out at 15s I've traced the php script and pin-pointed the problem to a system call "is_file()" which eats up 99.99% of the script execution. So why is reading through Glusterfs 100x slower than the local folder? is there a way to improve that? Thanks in advance greg