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Bug 1417737

Summary: Cold Merge: Deprecate mergeSnapshots verb
Product: [oVirt] vdsm Reporter: Ala Hino <ahino>
Component: CoreAssignee: Ala Hino <ahino>
Status: CLOSED CURRENTRELEASE QA Contact: Kevin Alon Goldblatt <kgoldbla>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 4.19.0CC: ahino, bugs, ratamir, tnisan
Target Milestone: ovirt-4.1.1Keywords: CodeChange
Target Release: 4.19.5Flags: rule-engine: ovirt-4.1+
Hardware: Unspecified   
OS: Unspecified   
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Last Closed: 2017-04-21 09:45:50 UTC Type: Bug
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oVirt Team: Storage RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Ala Hino 2017-01-30 20:06:38 UTC
Description of problem:
Deprecate old cold merge verb

Comment 1 Ala Hino 2017-01-30 20:07:17 UTC
Code change only; nothing to verify

Comment 2 Yaniv Kaul 2017-01-31 10:54:24 UTC
So hosts with 4.0 VDSM would still work? What is 'old' cold merge verb? How old is it?

Comment 3 Ala Hino 2017-01-31 11:26:39 UTC
Absolutely, hosts with 4.0 Vdsm will use the 'old' flow (introduced in 3.1). The fact that we are marking the verb as deprecated doesn't mean that we are removing it, this only states that the API will be removed in a future version.

In a nutshell, the 'old' cold was done using a single SPM verb (that we are marking as deprecated now) where the data copied from base volume to top volume (hence the low performance when base is large and top is small).

Comment 4 Kevin Alon Goldblatt 2017-02-15 18:26:14 UTC
Move to VERIFIED based on comment1 and explanation in comment3
New Cold merge has been tested