[Engine-devel] DC Compat Version Vs Storage Format Version

Deepak C Shetty deepakcs at linux.vnet.ibm.com
Fri Mar 1 07:04:45 UTC 2013


Hi All,
    I am seeing an error while testing the WIP engine patches  for 
supporting GLUSTERFS_DOMAIN @

http://gerrit.ovirt.org/#/q/project:ovirt-engine+branch:master+topic:glusterfs,n,z

(Copyign Sharad, who is the author for the patch series)
Note my VDSM host has VDSM running which  has support for 
GLUSTERFS_DOMAIN (its already upstream in VDSM)

I get the below error in GUI while trying to create a new Storage Domain 
of type Data/GlusterFS
*Error: Cannot add Storage. Storage format V3 is not supported on the 
selected host version." *

I cannot change storgae format in the GUI, its fixed at V3
DC is of type GlusterFS and so is cluster, compat version is 3.3

I have few questions ...

1) How are compat version and storage format related ?

2) What does 'host version' in the above error msg mean. It doesn't tell 
clearly why/what the incompatibility is about

3) What needs to be done in the engine to make this work ?

thanx,
deepak

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