Encrypted Home Directory Performance
December 8, 2008
Thanks very much to Michael Larabel of Phoronix.
He picked up the instructions from my last blog post, Ubuntu Jaunty: Encrypted Home Directories and ran the Phoronix performance suites.
These are very early results, on a nascent Jaunty distribution still undergoing heavy development. But I must say that I’m rather pleased with the performance hit to the majority of the workloads they tested.
There was roughly a 1% hit in most tests (compilation, compression, audio/video encoding, image processing). The hit was a bit more significant when encrypting a file in userspace, on top of eCryptfs (which is really asking the kernel to encrypt already encrypted data, and compress), as well as the huge-file write. We’re looking into some optimizations we might be able to make at the kernel level to improve this.
Without further adieu…