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SAP HANA - vMotion bottleneck
Hi,
we're planning a refresh of our existing vSphere SAP HANA cluster. VMs have up to 2 TB RAM and currently vMotion between hosts with 2 x 10G is not really possible, VMs sometimes freeze etc. and it just takes ages. I've to retest with vSphere 7.0.3 but anyway...
As we have to replace hosts we think about 100G, our current standard in DC is 25G but I hope that 100G will speed up vMotion for those large VMs even more.
Any real life experience how big the benefit for vMotion of HANAs is? Is it linear of will it slow down at xx GB? 100G will need new network equipment not only for access switches, network team told me that bandwidth of spine/leaf switch also needs to be boosted. So there are some €€ involved.
Information found here looks promising.
Thanks
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Great topic! ![]()
And do not forget the best practices for vmotion and networking!
Often the simple things and basics are forgotten to consider. ![]()
https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vcenterhost.doc/GUID-7DAD15D4-7F41-...
I do not have experience yet with SAP HANA & VMware. But in the future I will.
My resources until now were:
https://www.vmware.com/content/dam/digitalmarketing/vmware/en/pdf/whitepaper/sap_hana_on_vmware_vsph...
https://core.vmware.com/resource/sap-hana-vmware-vsphere-best-practices-and-reference-architecture-g...
https://wiki.scn.sap.com/wiki/display/VIRTUALIZATION/SAP+on+VMware+vSphere
And another blog:
https://www.stephenwagner.com/2022/06/19/optimizing-vmware-vmotion/
Greetings