Hi all, We run glusterFS in our testing lab (since 2.0rc1). We are currently using client-side AFR (mirror) with two server and two clients over GigE. Testing is going well except one important point: How do you upgrade with minimal/zero downtime? Here I have several questions: 1. Is the wire-protocol stable during major releases? Can I mix and match all 2.0.x client/servers? If not how do find out which one are compatible? 2. Can I export one directory on the servers through multiple instances of glusterfsd (running on different ports)? This would allow to run old and new version in parallel for a short time and do a test from the client. 3. How do I restart clients without shutting down all services accessing the mountpoint? Will glusterfs re-read config via signals (HUP)? Or is it OK to kill/restart in one go? How do YOU handle upgrades, especially wrt downtime and rolling back to a known good configuration? cheers and thanks in advance Paul BTW: I have automated most of compile/install/confgen/start/stop on multiple clients/servers via bash/ssh. If someone is interested I could share it here.
