Change in vdsm[master]: vm: migration: exponential downtime increment

fromani at redhat.com fromani at redhat.com
Mon Sep 1 07:32:12 UTC 2014


Francesco Romani has posted comments on this change.

Change subject: vm: migration: exponential downtime increment
......................................................................


Patch Set 3:

(3 comments)

http://gerrit.ovirt.org/#/c/25820/3//COMMIT_MSG
Commit Message:

Line 18: 
Line 19: d = c ** s
Line 20: 
Line 21: where d is the downtime, s is the step and c is the
Line 22: exponentiation coefficient computed in such a way
> sorry for my puritanism, but in mathematics, "c" is called the *base* of th
Your puritanism is very welcome. Will fix.
Line 23: of when s = S (number of steps to perform),
Line 24: then we will have d = D (selected downtime).
Line 25: 
Line 26: Please note that this patch still preserve an linear


Line 23: of when s = S (number of steps to perform),
Line 24: then we will have d = D (selected downtime).
Line 25: 
Line 26: Please note that this patch still preserve an linear
Line 27: increment of the wait time.
> Could you explain why a exponential growth is better than linear?
Sure, will amend the commit message.
Line 28: 
Line 29: Change-Id: I6401772f52ea28144452e67198bddff18f6703eb
Line 30: Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1004101


Line 26: Please note that this patch still preserve an linear
Line 27: increment of the wait time.
Line 28: 
Line 29: Change-Id: I6401772f52ea28144452e67198bddff18f6703eb
Line 30: Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1004101
> Why is that bug secret? Please make it public, or better explain the need f
I'll start with better explanation.


-- 
To view, visit http://gerrit.ovirt.org/25820
To unsubscribe, visit http://gerrit.ovirt.org/settings

Gerrit-MessageType: comment
Gerrit-Change-Id: I6401772f52ea28144452e67198bddff18f6703eb
Gerrit-PatchSet: 3
Gerrit-Project: vdsm
Gerrit-Branch: master
Gerrit-Owner: Francesco Romani <fromani at redhat.com>
Gerrit-Reviewer: Dan Kenigsberg <danken at redhat.com>
Gerrit-Reviewer: Francesco Romani <fromani at redhat.com>
Gerrit-Reviewer: Michal Skrivanek <michal.skrivanek at redhat.com>
Gerrit-Reviewer: Vinzenz Feenstra <vfeenstr at redhat.com>
Gerrit-Reviewer: automation at ovirt.org
Gerrit-Reviewer: oVirt Jenkins CI Server
Gerrit-HasComments: Yes


More information about the vdsm-patches mailing list