Hi, using 512 MByte of (nearly) random data (taken from /dev/urandom) on a server with four dual core AMD Opteron 875 processors, dd'ing to a non-encrypted partition of the SCSI-hardware-RAID5 disks (with bs=50M) returns about 320 MB/s according to dd, and so does writing to or reading from encrypted parts of the RAID5 disks (aes-cbc, keysize=256) with dm-crypt (many thanks to those who have been so kind as to develop this fine tool!). IMHO, the motherboard (Tyan S2882) plays its part in this result, and so does the SCSI controller ... Best wishes and regards, Ernst Am Donnerstag, 9. November 2006 15:52 schrieb Andreas Westin: > Gerald Hopf wrote: > > Hi, > > > > > > does anyone here have performance experience with dm-crypt running on > > dual-core vs. single-core systems? > > > > I am currently using AES-128 encryption and am able to get about 31MB/s > > sustained performance on my single-core athlon 64 3000+ (when copying > > from the encrypted volume to a fast non-encrypted volume). > > > > Since 31MB/s is will below the limits of gigabit ethernet, i would like > > to get even more performance :-) > > > > Does anyone know if the AES encryption (or any other available > > encryption, I'm willing to swap if necessary) does profit from adding a > > second cpu (core) ? > > > > Gerald > > Hello, > > I'm using luks on a dual athlon mp 1800+ and when doing large copies it > loads both cpu:s and I'm seeing similiar performance you are seeing but > with AES-256. > > /Andreas > > > --------------------------------------------------------------------- > > dm-crypt mailing list - http://www.saout.de/misc/dm-crypt/ To > > unsubscribe, e-mail: dm-crypt-unsubscribe@xxxxxxxx > > For additional commands, e-mail: dm-crypt-help@xxxxxxxx > > --------------------------------------------------------------------- > dm-crypt mailing list - http://www.saout.de/misc/dm-crypt/ > To unsubscribe, e-mail: dm-crypt-unsubscribe@xxxxxxxx > For additional commands, e-mail: dm-crypt-help@xxxxxxxx --------------------------------------------------------------------- dm-crypt mailing list - http://www.saout.de/misc/dm-crypt/ To unsubscribe, e-mail: dm-crypt-unsubscribe@xxxxxxxx For additional commands, e-mail: dm-crypt-help@xxxxxxxx
