[Gluster-devel] Upgrading Gluster

Anand Babu Periasamy ab at gluster.com
Wed Dec 9 12:14:51 UTC 2009

Brian Hirt wrote:
> I have a question about upgrading, but it's not really answered in http://gluster.com/community/documentation/index.php/GlusterFS_General_FAQ#Will_GlusterFS_be_upward_compatible.3F
> I have a 4 node system, with AFR/Distribute.   Can I shut down the servers one at a time,  upgrade from 2.0.6 to 2.0.8 and restart the node.  After doing this process on all four servers will everything be running okay?
> Also, a bit longer term, migrating from 2.x to the soon to be released 3.x branch, will this method work as well?  Once all servers have been upgraded, will they automatically renegotiate to the most recent protocol or does the entire cluster need to be shut down and restarted. 
Hi Brian,
You can do that between 2.0.6 to 2.0.8. All 2.0.x will be compatible to each other. Though 
I recommend upgrading all servers at once. To upgrade to 3, you need to upgrade all your 
servers and clients. Backend data layout is same. After upgrading the installation, you 
restart GlusterFS servers and remount the clients.

Dynamic volume management (to add, remove, suspend) servers without requiring re-mount is 
going to be the key focus of 3.1 release.

Anand Babu Periasamy
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