Re: xenstore - Suggestion of batching watch events

[Christian Lindig <christian.lindig@xxxxxxxxx>]

> On 24 Jun 2025, at 16:43, Andriy Sultanov <sultanovandriy@xxxxxxxxx> wrote:
> 
> But I think this only covers part of the problem. Looking at the concrete 
> case of
> xenopsd and Windows VMs, xenopsd cares about most of the nodes it receives
> watch events from, the issue is that it doesn't know when these are grouped
> together in one way or another.

Is the common case that a client wants to observe the changes rather than just 
knowing that a change occurred? If so, it seems transmitting changes as part of 
a watch event (rather than forcing the client to traverse the tree) would be a 
better protocol. That would suggest to introduce a new kind of watch that 
reports changes at the end of a transaction. The size of the event would depend 
on the size of the change.

— C