Re: [ceph-users] krbd exclusive-lock

2017-03-21 Thread Jason Dillaman
The exclusive-lock feature does, by default, automatically transition the lock between clients that are attempting to use the image. Only one client will be able to issue writes to the image at a time. If you ran "dd" against both mappings concurrently, I'd expect you'd see a vastly decreased throu

[ceph-users] krbd exclusive-lock

2017-03-21 Thread Mikaƫl Cluseau
Hi, There's something I don't understand about the exclusive-lock feature. I created an image: $ ssh host-3 Container Linux by CoreOS stable (1298.6.0) Update Strategy: No Reboots host-3 ~ # uname -a Linux host-3 4.9.9-coreos-r1 #1 SMP Tue Mar 14 21:09:42 UTC 2017 x86_64 Intel(R) Xeon(R) CPU E5