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Bug 1083763 - PRD35 - [RFE] replace XML-RPC communication (engine-vdsm) with json-rpc based on bidirectional transport
Summary: PRD35 - [RFE] replace XML-RPC communication (engine-vdsm) with json-rpc based...
Alias: None
Product: Red Hat Enterprise Virtualization Manager
Classification: Red Hat
Component: RFEs
Version: 3.5.0
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
: 3.5.0
Assignee: Piotr Kliczewski
QA Contact: Pavel Stehlik
Whiteboard: infra
Depends On: 1081049 1136876 1140175
Blocks: 1124129 rhev3.5beta 1156165
TreeView+ depends on / blocked
Reported: 2014-04-02 22:19 UTC by Barak
Modified: 2016-02-10 19:23 UTC (History)
12 users (show)

Fixed In Version: vt2.2
Doc Type: Enhancement
Doc Text:
Clone Of: 1081049
Last Closed: 2015-02-11 17:58:36 UTC
oVirt Team: Infra
Target Upstream Version:

Attachments (Terms of Use)

System ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:0158 normal SHIPPED_LIVE Important: Red Hat Enterprise Virtualization Manager 3.5.0 2015-02-11 22:38:50 UTC

Description Barak 2014-04-02 22:19:13 UTC
+++ This bug was initially created as a clone of Bug #1081049 +++

The current communication between engine and vdsm is done using XML-RPC, where the engine actually acts as client and each vdsm is the server.
This pauses a few issues that when it comes to scale effect drastically:
- XML is expensive to parse
- This mechanism forces the engine to poll each vdsm frequently for information

The intent for this phase is to:
- move to json-rpc (same API)
- change transport to a real bidirectional transport to enable vdsm->engine events in the future

Comment 1 Tareq Alayan 2014-05-27 13:56:35 UTC
Hi Kliczewski

This feature looks like a wide infrastructure change. 
Can you please provide a URL to the spec page so we can design a test plan for this?

Comment 2 Piotr Kliczewski 2014-05-27 14:03:20 UTC
Here is a link [1] to design spec.


Comment 4 Eyal Edri 2014-09-04 16:01:23 UTC
still not fixed on vt2.2, should come with next respin.

Comment 5 Oved Ourfali 2014-09-08 16:23:55 UTC
Feature can be tested... if it has bugs it doesn't mean it can't be tested.

Comment 8 errata-xmlrpc 2015-02-11 17:58:36 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

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