Thanks. I also found a couple of good articles. One on theory http://www.securityfocus.com/infocus/1673 And one with good bonnie++ results: (This took an hour of googling to find) http://vware.hypermart.net/howto_filesystem_encryption.htm >From the last one: Based on a Pentium 3 800 MHz - 60 GB IDE drive -- UDMA (66) Crypto Write speed % Loss Read speed % Loss Unencrypted 24619 kB/s -- 25273 kB/s -- AES-128bit 20880 kB/s 15.2% 8054 kB/s 68.1% AES-256bit 17699 kB/s 28.1% 8031 kB/s 68.2% 3DES-64bit 4846 kB/s 80.3% 3334 kB/s 86.8% 3DES-192bit 4869 kB/s 80.2% 3334 kB/s 86.8% BLOWFISH-128bit 19769 kB/s 19.7% 8029 kB/s 68.2% BLOWFISH-256bit 19755 kB/s 19.8% 8047 kB/s 68.2% That agrees with your slowdown estimates. Greg >> On Wed, Mar 12, 2003 at 05:08:49PM -0500, Greg Freemyer wrote: >> > All, >> > >> > I know this is off-topic, but does anyone know where I can find info on >> the CPU hit from using a software encrypting FS. >> well, i'll quickly bring in some LVM stuff, as i run encryption both under >> and ontop of a LVM-system. (different cihper though). >> > In particular I would like to see a comparison between None, Microsoft >> EFS, and Linux loopback encryption. >> well, isnt EFS a FS encryption? loopback is a block encryption, there is a >> difference. My experience is that i with loop-AES or PPDD, (blowfish as >> cipher) gets about 1/4 to 1/3 of the performance of raw. >> JonB >> _______________________________________________ >> linux-lvm mailing list >> linux-lvm@sistina.com >> http://lists.sistina.com/mailman/listinfo/linux-lvm >> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
