Hello, I've just started investigating Cinder volume encryption using Queens (RHOSP13) with a Ceph/RBD backend and the performance overhead is... surprising. Some naive bonnie++ numbers, comparing a plain vs encrypted volume: plain: write 1400MB/s, read 390MB/s encrypted: write 81MB/s, read 83MB/s The encryption was configured with: openstack volume type create --encryption-provider nova.volume.encryptors.luks.LuksEncryptor --encryption-cipher aes-xts-plain64 --encryption-key-size 256 --encryption-control-location front-end LuksEncryptor-Template-256 Does anyone have a similar setup, and can share their performance figures, or give me an idea of what percentage performance impact I should expect? Alternatively: is AES256 overkill, or, where should I start looking for a misconfiguration or bottleneck? Thanks in advance. Dave -- ** Dave Holland ** Systems Support -- Informatics Systems Group ** ** 01223 496923 ** Wellcome Sanger Institute, Hinxton, UK ** -- The Wellcome Sanger Institute is operated by Genome Research Limited, a charity registered in England with number 1021457 and a company registered in England with number 2742969, whose registered office is 215 Euston Road, London, NW1 2BE.