| Re: Slow Live Migration (prlctl migrate) [message #53490 is a reply to message #53487] |
Wed, 20 March 2019 19:19  |
alenco
Messages: 10
Registered: August 2014
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Junior Member |
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Thanks for your reply, really much appreciated.
Well for example, i just tried to migrate a 25GB disk CT, with 8GB RAM. The copying static data stops after 5,5GB. Then starts the Live Migration stage. Always at 18MegaByte per second. Not slower, not faster. Like its a cap or something.
Looking at the server, there is at least 20GB of disk space in use (90% is static content like images). You would expect to get more data trough the first stage. Looking at the private folder on source node, its 27GB.
So if the slow speed happens when working with dirty data, i have no issue with it, but when i have to move 1TB of CT than it takes a very long time.
Is there a way to do export a debug log on this, that i can read and check myself for logical explanations.
This happens for all servers that i try on whatever node, if its small or big. All nodes are upgraded to latest versions of Virtuozzo 7 and kernel.
Even when i do this on 2 nodes, that does not have any load on it at all, it does not make a difference. Both nodes, when at the live migration stage, are not using any io / memory or cpu at all. So no bottleneck in there.
Thanks in advance.
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