Re: set rbd metadata 'conf_rbd_qos_bps_limit', make 'mkfs.xfs /dev/nbdX ' blocked - ceph-users

16 Nov 2020

(CCing ceph-users since that is the appropriate forum).

On Mon, Nov 16, 2020 at 4:44 AM liugangbiao(a)cmss.chinamobile.com <
liugangbiao(a)cmss.chinamobile.com&gt; 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