Hi, client_force_lazyio only works for ceph-fuse and libcephfs: https://github.com/ceph/ceph/pull/26976/files You can use the ioctl to enable per file with the kernel mount, but you might run into the same problem we did: https://tracker.ceph.com/issues/44166 Please share if it works for you. Cheers, Dan On Tue, Jun 8, 2021 at 8:16 AM opengers <zijian1012@gmail.com> wrote:

ceph: 14.2.x kernel: 4.15

In cephfs, due to the need for cache consistency, When a client is executing buffer IO, another client will hang when reading and writing the same file

It seems that lazyio can solve this problem, lazyio allows multiple clients to execute buffer IO at the same time(relax consistency), But I am not sure how to enable lazyio under the kernel mount, the test found that the "client_force_lazyio" parameter does not work

My final requirement is to use lazyio to implement multiple clients to read and write the same file(buffer IO mode)

Can someone explain how to enable lazyio under kcephfs, thanks _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-leave@ceph.io