It depends on the supportedENGINEs which getVdsCaps will return. Generally, VDSM for 3.x should keep supporting its 3.x previous minor versions. Regards, Maor ----- Original Message ----- From: "David cano bailen" <davidcano92@gmail.com> To: "Maor Lipchuk" <mlipchuk@redhat.com> Sent: Thursday, August 14, 2014 6:02:17 PM Subject: Re: [ovirt-users] Some questions hi, my concern is that we have some critical MV. If the node enters into non -operational state after upgrading the engine. Will be machines up? I've been searching and upgrading should be progressive, 3.0 to 3.1, 3.1 to 3.2 .... I guess if the nodes VDSM update to the latest version, and later I'll update the engine version by version nodes wouldnt enter on non-operational state and not suffer any court in MV. Am I right? Thank you very much for your help 2014-08-14 11:10 GMT+02:00 Maor Lipchuk <mlipchuk@redhat.com>:

Hi David,

See my answers inline

Regards, Maor

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From: "David cano bailen" <davidcano92@gmail.com> To: users@ovirt.org Sent: Wednesday, August 13, 2014 2:04:10 PM Subject: [ovirt-users] Some questions

Hi, i installed Engine 3.0 and Node Ovirt 2.6, but it seems very unestable. Sometimes machines doesnt starts, nodes doesnt vinculate or UI doesnt work fine. I have only 2 nodes and storage its on the same physical machine

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engine.

-¿Does Node Ovirt 3.4 work with Engine 3.0? Engine 3.0 should support backward compatibility for ovirt 3.4. You can verify that on the node be executing the following command : "vdsClient -s 0 getVdsCaps" (-s for secure), There, you should see a supportedENGINEs list. -¿Its necessary shutdown Nodes to do engine upgrade? no, but take in consideration that after upgrade, those hosts might get into non-operational state, in case VDSM version should be upgraded also. -¿Are there any problem having the same physical machine for engine and storage? ¿what are advantages have on diferents machines? There is no limitation of doing that, it's simply a question of the architecture you want to support. Separating the engine from the Storage server, might be useful to make it more high available.

Thank you

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