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From: | Dr. David Alan Gilbert |
Subject: | Re: [Qemu-block] [Qemu-devel] [PATCH 4/6] dirty-bitmaps: clean-up bitmaps loading and migration logic |
Date: | Thu, 2 Aug 2018 10:50:57 +0100 |
User-agent: | Mutt/1.10.0 (2018-05-17) |
* Denis V. Lunev (address@hidden) wrote: > > I don't quite understand the last two paragraphs. > we are thinking right now to eliminate delay on regular IO > for migration. There is some thoughts and internal work in > progress. That is why I am worrying. What downtime are you typicaly seeing and what are you aiming for? It would be good if you could explain what you're planning to fix there so we can get a feel for it nearer the start of it rather than at the end of the reviewing! Dave > > > However, coming back to my question; it was really saying that > > normal guest IO during the end of the migration will cause > > a delay; I'm expecting that to be fairly unrelated to the size > > of the disk; more to do with workload; so I guess in your case > > the worry is the case of big large disks giving big large > > bitmaps. > > exactly! > > Den -- Dr. David Alan Gilbert / address@hidden / Manchester, UK
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