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A comment on Efficient data transfer through zero copy. Parent comment
Nowadays, Smart NICs can handle encryption and IOMMU provides (some) security isolation.
The sendfile() syscall uses these if available. (https://people.kernel.org/kuba/tls-1-3-rx-improvements-in-li...)
I never used Kafka. I'd expect that using Cloud HSM for TLS/SSL offloads in any cloud should get you zero copy with encryption.
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Nowadays, Smart NICs can handle encryption and IOMMU provides (some) security isolation.
The sendfile() syscall uses these if available. (https://people.kernel.org/kuba/tls-1-3-rx-improvements-in-li...)
I never used Kafka. I'd expect that using Cloud HSM for TLS/SSL offloads in any cloud should get you zero copy with encryption.