bandwitdh limit while migrate vms : disk migration vs memory migration

J

jihere

Active Member
May 2, 2018
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hi proxmox forum team,
2 nodes cluster here, without shared storage beetween them. So vms migration involves disk migration too, and I need to limit bandwith while migrating disks because with full speed, hosts and vms become erraticly unresponsive because of hosts disks poor performance. If set "disk move" limit, It does not affect moving disk operations while migrating vms. Setting migration limit is effective, but affect vm RAM move too, which I don't want.
Is there a way to just set disk migration speed limit and let memory migration at full speed ?

best regards
julien
 
You can use "Migration Settings" to set which network used for transfer migrate data, and in the "Bandwidth Limits" you can set the maximum bandwidth used during migration task executing. Both settings you can found in "Options" field under "Datacenter"
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Hi David,
Thank you for your answer.
However, it seems when I set "disk move" bandwidth limit, it does not affect disk migration operations.
When I set "migration" bandwidth, it does affect the disk move between hosts, but also the memory move. I was wondering if there is a way to limit migration disk move bandwidth without limiting memory migration, because I think limiting memory migration increase the vm downtime in migration operations.
best regards
julien
 
Yes, in my experience the migration limit will affect both "Disk Move" and VM "Migrate" tasks, I comforted myself by saying "safety > quickly done". But if I want to limit "Disk Move" only, then maybe I will setup the limitation before doing "Disk Move" and then remove the limitation before doing VM "Migrate". But to be honest, it's a bit troublesome! Maybe someone will provide a batter solution.
 
Yes but to do so you need some kind of shared storage between hosts; as far as I know, it seems that local storage disk move is doable only trough vm migration, not on move only disk action.
best regards
julien
 
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