[IMPALA-6666] Impala 2.12 & 3.0 Docs: Use AES-GCM for spill-to-disk encryption when CLMUL instruction is present and performant

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: Impala 3.0, Impala 2.12.0
• Fix Version/s: Impala 3.0
• Component/s: Docs
• Epic Color: ghx-label-7
• Assignee: Alex Rodoni
• Reporter: Alex Rodoni
• Created: 14/Mar/18 20:32
• Updated: 05/Apr/18 22:12
• Resolved: 05/Apr/18 22:12

Description

This is a performance optimization for spill-to-disk when encryption is enabled. If running with an OpenSSL version with AES-GCM support on a CPU that supports the CLMUL instruction, this faster encryption mode will be used.