[openstack] how to speed up live migration?

Radosław Piliszek radoslaw.piliszek at gmail.com
Fri Aug 5 10:04:34 UTC 2022


On Fri, 5 Aug 2022 at 12:00, Ignazio Cassano <ignaziocassano at gmail.com> wrote:
>
> When the instance is migrated again from te second to the first it takes 10 seconds.
> If first node has more loads on network or memory, it should take a long time in any case.
> Keep in mind I am not using hugepages but default configuration.
>
> I am convinced that it is about how the memory of an instance is managed after it runs for a long time on a node

Just keep in mind the transfer rates you get are VERY LOW for anything
RAM-like. It's around 20 MiB/s - my old HDD could go faster than that
with mediocre fragmentation. ;-)
It's more likely it spends time waiting for something instead of doing
real work.

-yoctozepto



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