> The libceph API is not yet very well tested. > Can you simply mount the filesystem from both hosts using the kernel > client and have your application open/access the single file with the > standard system call interface? Hi Brian, There are three reasons for using libceph API: 1. My application could use non-posix API, like libceph and librbd, very conveniently and flexible. 2. If using the kernel client, performance will reduce because of the VFS layer. I have done some test for a comparison two weeks ago. 3. If error or exception appear int the kernel client, the whole machine may be not able to work. Thx! Simon -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html