speedup live migration

P

PointPubMedia

Active Member
Aug 3, 2017
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Hey folks..

We are having a 6 nodes cluster right now, using a 4ports NIC using LACP for VM traffics and also a virtual interface for the corosync traffic and another 4 ports NIC for the iSCSI traffic.

Am I right to say that the migration traffic is using the "LACP" traffic and not the corosync interface?

How can we speedup drastically the speed of live migration ?
 
Hi,

PointPubMedia said:
How can we speedup drastically the speed of live migration ?
Click to expand...
with a faster nic.

LACP is not able to increase the bandwidth for single connections.
If your switch would support RoundRobin this would increase the bandwidth.
But do this only if the switch supports it. If, not you get problems with the packed order.
 
It could be done with:

migrate_set_capability multifd on
migrate_set_parameter multifd-channels 4 (number of links)

on source guest.

(I just need to check how it's work with proxmox ssh tunnel, or with socat with ssh is disabled)
 
spirit said:
It could be done with:

migrate_set_capability multifd on
migrate_set_parameter multifd-channels 4 (number of links)

on source guest.

(I just need to check how it's work with proxmox ssh tunnel, or with socat with ssh is disabled)
Click to expand...
Hey man, sorry to re-vive a dead post, where do you put those settings?
 
Hi,
adirburke said:
Hey man, sorry to re-vive a dead post, where do you put those settings?
Click to expand...
this is currently not implemented and requires changes to the Proxmox VE source code. I've evaluated multifd migration a while ago, and it worked fine, but requires a bit restructuring of the current migration code. In particular, we'd need to use -incoming defer when starting the target instance and set the multifd parameters on the source and target before starting the actual migration.
 
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