Bug 1335366

Summary:	[RFE] Gluster RPC should have capability to support multiple PROGRAM VERSIONS
Product:	[Community] GlusterFS	Reporter:	Raghavendra Talur <rtalur>
Component:	rpc	Assignee:	Milind Changire <mchangir>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	mainline	CC:	atumball, bugs, nbalacha
Target Milestone:	---	Keywords:	RFE, Triaged
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Hardware:	Unspecified
OS:	Unspecified
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Fixed In Version:		Doc Type:	Bug Fix
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Clone Of:		Environment:
Last Closed:	2018-10-08 17:38:31 UTC	Type:	Bug
Regression:	---	Mount Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Raghavendra Talur 2016-05-12 05:16:04 UTC

Description of problem:
When new features are added, we might need to extend/change the existing RPC Procedures. This breaks backward compatibility with old clients unless there is support for versioning of rpc programs thereby allowing existence of two versions of same procedure. Clients would then be able to choose the version they would want to send requests to as part of the negotiation/handshake.

This when implemented would reduce the need to extend the features using xdata which is opaque object for RPC. The xdata method is more prone to errors because RPC can't impose checks on xdata.

Comment 1 Amar Tumballi 2018-10-08 17:38:31 UTC

This feature is already available with RPC implementation in glusterfs.

For better reading: https://github.com/gluster/glusterfs/blob/master/doc/developer-guide/rpc-for-glusterfs.new-versions.md