(CCing ceph-users since that is the appropriate forum). On Mon, Nov 16, 2020 at 4:44 AM liugangbiao@cmss.chinamobile.com < liugangbiao@cmss.chinamobile.com> wrote:

Hi dillaman，

After I set rbd metadata 'conf_rbd_qos_bps_limit' as blow (600MB/s), the image size is 1TB

Then I use 'mkfs.xfs' to format this image, It's stuck for a long time and never return.

After unset 'conf_rbd_qos_bps_limit', 'mkfs.xfs' can return successfully, The *Ceph version is 14.2.10*, Any suggestion to reslove this porblem?

Have you tried using the "-K" option to "mkfs.xfs" to disable discard at mkfs time? Perhaps it's issuing a discard region bigger than 600MiB?

Beset Regards， LiuGangbiao

-- Jason