[libvirt] Raising limits for our RPC messages

[Vasiliy Tolstov]

2017-05-04 14:49 GMT+03:00 Daniel P. Berrange <berrange at redhat.com>:
>
> So I think it is reasonable to simply increase the buffer size as
> we have done before.
>
> That said, we should bear this problem in mind before adding more
> "bulk query" APIs, as it isn't sensible to carry on increasing
> RPC message size forever. As somepoint we have to consider that
> serializing 100's of MB of data into an RPC message is an
> inherantly inefficient design, and consider alternative API
> designs without this.
>
> For bulk stats query we could do something totally radical and
> have the facility  for the client to send us a shared memory
> region which we asynchronously populate with stats, avoiding the
> RPC layer entirely. Obviously only works for local connections,
> but I get the impression that most mgmt apps have a node-local
> agent talking to libvirtd anyway.


Does it possible to compress/uncompress data before/after transmission?
I think that stats data can be efficient compressed...

-- 
Vasiliy Tolstov,
e-mail: v.tolstov at selfip.ru