That’s sounding more likely to be the network between the clusters/DCs than your ovirt setup. Ovirt clusters are just logical groupings, they don’t manage any networking directly themselves. Some questions to ask: - Does the inter cluster link have a lower than 9000 mtu? - What’s the latency between your clusters? - What’s the bandwidth between them (ie, are you tunneling over the internet or do you have 200G of private fiber between them)? - does the carrier between clusters have a lower MTU? -Darrell
On Mar 15, 2024, at 7:48 AM, John Mortensen <jpm@b4restore.com> wrote:
Hi Jorge, We're using the VirtIO driver, the MTU is 9000 and the physical NICs are 25G. The ports are grouped in bonds. ( 2 x 25G interfaces in a bond ) After additional tests we have seen the following: * between vm's on same host - speed is as expected * between vm's on different hosts in same cluster - speed is as expected * between vm's on different hosts and in different cluster - speed is much lower than expected. I was curious why the speed drops when we go across clusters, and was wondering if there are some limitations cluster wide or some tuning cluster wide that could be tweaked. /John
/John _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/XNNYC7MXPDPD5I...