Re: [ovirt-devel] [vdsm] Engine XML: metadata and devices from XML

On 03/16/2017 11:47 AM, Michal Skrivanek wrote: >> On 16 Mar 2017, at 09:45, Francesco Romani <fromani(a)redhat.com&gt; wrote: >> >> We talked about sending storage device purely on metadata, letting Vdsm >> rebuild them and getting the XML like today. >> >> In the other direction, Vdsm will pass through the XML (perhaps only >> parts of it, e.g. the devices subtree) like before. >> >> This way we can minimize the changes we are uncertain of, and more >> importantly, we can minimize the risky changes. >> >> >> The following is a realistic example of how the XML could look like if >> we send all but the storage devices. It is built using my pyxmlpickle >> module (see [3] below). > That’s quite verbose. How much work would it need to actually minimize it and turn it into something more simple. > Most such stuff should go away and I believe it would be beneficial to make it difficult to use to discourage using metadata as a generic junkyard It is verbose because it is generic - indeed perhaps too generic. I can try something else based on a concept from Martin Polednik. Will follow up soon.