@JamesG sure but none of those do concrete troubleshooting and digging to establish where it is and it also only seems like isolated issues and not something broad (while it is but people didnt look at it as such).
Posts made by Seneram
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RE: Epyc VM to VM networking slow
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RE: Epyc VM to VM networking slow
@JamesG this bug has not been reported for two years. This thread is 6 months and our big report is open about the same amount of time.
It has had excellent attention since day one of us reporting it .
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RE: Epyc VM to VM networking slow
@olivierlambert as @bleader mentioned. All testing shows that it is any VM networking at all. Vm to vm, vm to host, vm to external appliances are all equally affected. Just that vm to vm issue is half the bandwidth of all other usecases since i has to handle traffic to both VMs and as such is found faster. But no matter how the VM communicates there is an upper roof bandwidth limit that is VERY low.
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RE: Epyc VM to VM networking slow
@manilx @florent it would make sense since XOA vm for backups is after all an VM and should be impacted by VM network issues for epycs.
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RE: Epyc VM to VM networking slow
@Forza We have tried all the settings avail to tweak on our hardware, We have a full big twin chassi we have dedicated to vates doing testing of this issue and the first roughly month was spent going over settings together with vates and making sure everything was tweaked properly.
AMD is involved themself and if anyone knows AMD firmware settings and tweaking it would be AMD.
In all seriousness it is a very good suggestion but it has been looked into and unfortunately do minimal or no difference.
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RE: Epyc VM to VM networking slow
@nicols Hello, you are not alone in this. We have delayed the deployment of our core ISP routing as virtual routers due to this.
We have an XOA premium and xcp-ng enterprise subscription and an open case on this.
I cannot go into detail about what is being said in there but i can say that the approach @olivierlambert and vates have is very good and they have my full confidence on this one.
@manilx i can say this affects all vm traffic as we have vm out to switch over to a second hardware host into a VM there and we see the limit there aswell just the roof is twice as high as inside the same HW box
Either way. Vates is VERY well aware of how serious this is and are taking good efforts to fix it.
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RE: Epyc VM to VM networking slow
Heya!
Just chiming in that we (WDMAB) Are keeping tabs on this thread as well as our ongoing support ticket with you guys.
Saw our result up on the list.
If we can do ANYTHING further to assist then please do tell us. We are available 24/7 to solve this issue since it is very heavily impacting to our new production deployment.Regards.
Mathias W.