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Are there any performance benefits for using ESX 4.1 or ESXi 4.1 or ESXi 5?
I knew about the ESXi restrictions with replication in v5, which is why we kept ESX for our hosts, but I was curious if there was any performance benefits with one version or another.
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There are no performance differences between different host types (ESX vs. ESXi) or host versions (4.1 vs. 5).ESXi-centric processing engine. Veeam is fully committed to VMware’s strategy around vSphere, which includes focusing exclusively on the ESXi architecture with vSphere 5 and going forward. v6 supports ESX and ESXi hosts in the same manner, providing top performance and reliability regardless of hypervisor architecture.
There is some unverified information that ESXi 5 has slightly better "network" (NBD) processing performance, but I have not confirmed this myself (my quick and dirty testing did not show noticeable differences). But in all cases, most people are unlikely to use "network" processing modes anyway, so it does not really matter.
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