[Gluster-devel] [Qusetions]How to upgrade glusterfs from 3.6.7 to 3.8 online？

[hujianfei at cmss.chinamobile.com]

Hi all

We have an old cluster using glusterfs-3.6.7,  and for some
reason we want to upgrade it to glusterfs-3.8. It has runned
for some days with about 3T datas written. It has 6 nodes, AFR 
replica 2  mode, OS CentOS 6.5. The directory quota function
and NFS IP seqerate function (configed by nfs.export-dir option) 
have been enabled and used.

Is it possible to upgrade glusterfs online in the condition I described
above? If positive, are there any  upgrade steps or suggestions can be 
provided?

--
Thanks
     Hu Jianfei
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