Huhhh...

Its unfortunate that every google search i did for turning off rbd cache, 
specified "put it in the [client] section".
Doh.

Maybe this would make a good candidate to update the ceph rbd docs?

Speaking of which.. what is the *exact* syntax for that command please?
None of the below work:

 rbd config global set rbd_cache  false
 rbd config global set rbd cache  false
 rbd config global set conf_rbd_cache  false
 rbd config global set rbd cache  false
 rbd config global set global cache  false

and the error messages are not helpful. for example,

# rbd config global set  cache  false
rbd: invalid config entity: cache (must be global, client or client.<id>)


??? I already specified global??

but then 

# rbd config global set global cache  false
rbd: not rbd option: cache



Very frustrating.



----- Original Message -----
From: "Jason Dillaman" <jdill...@redhat.com>
To: "Eugen Block" <ebl...@nde.ag>
Cc: "ceph-users" <ceph-users@ceph.io>
Sent: Thursday, December 17, 2020 5:09:17 AM
Subject: [ceph-users] Re: bug? cant turn off rbd cache?



If you want to change global (librbd) settings, please use "rbd config
global set ..." (which is just a wrapper around "ceph config set
global ..."). The conf files only apply to the single host where they
exist.
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