Change in vdsm[master]: Introduce a maximum time limit a migration may take
lyarwood at redhat.com
lyarwood at redhat.com
Tue Nov 26 17:15:45 UTC 2013
Lee Yarwood has posted comments on this change.
Change subject: Introduce a maximum time limit a migration may take
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Patch Set 1:
(1 comment)
After discussing this issue with Vinzenz and Tomas at length today I've suggested that for now we base the overall timeout value on a simple calculation using a percentage of the migration bandwidth.
In the longer term I really think we should move the logic for both calculating this timeout and monitoring migration progression to the engine.
I've created the following RFEs requesting this :
[RFE] Allow migration configuration values to be set per VM from engine
https://bugzilla.redhat.com/show_bug.cgi?id=1034871
[RFE] Engine should apply a sensible overall timeout to the live migration of guests.
https://bugzilla.redhat.com/show_bug.cgi?id=1034893
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File lib/vdsm/config.py.in
Line 54: 'Maximum time the destination waits since migration is stalled. '
Line 55: 'Please note, that this is not overall migration timeout. '
Line 56: 'Source waits twice as long (to avoid races).'),
Line 57:
Line 58: ('migration_max_time', '21600',
I've suggested that this value is based on the time taken to transfer the memory of a guest given a certain percentage of migration bandwidth.
For example for a 4GB guest allowing for 50% of the default 32MiB/s migration bandwidth we would set the timeout to 281.
Line 59: 'The maximum time in seconds a migration may take before the '
Line 60: 'migration will be aborted.'),
Line 61:
Line 62: ('migration_listener_timeout', '30',
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Gerrit-MessageType: comment
Gerrit-Change-Id: Ifd2f76b9334fcb7d2db24c081cccae15e8fd0b0c
Gerrit-PatchSet: 1
Gerrit-Project: vdsm
Gerrit-Branch: master
Gerrit-Owner: Vinzenz Feenstra <vfeenstr at redhat.com>
Gerrit-Reviewer: Dan Kenigsberg <danken at redhat.com>
Gerrit-Reviewer: Lee Yarwood <lyarwood at redhat.com>
Gerrit-Reviewer: Michal Skrivanek <michal.skrivanek at redhat.com>
Gerrit-Reviewer: Tomáš Došek <tdosek at redhat.com>
Gerrit-Reviewer: oVirt Jenkins CI Server
Gerrit-HasComments: Yes
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