At 01:14 PM 6/13/2007, you wrote: >On a side tangent. > >At WAVV, one of the speakers said you never want to do software encryption.= > The performance impact will eat you up. > >Of course, I disagree. > >In my book, it all depends on how much you want to encrypt. >I'll do it with spare cycles now, and pay for a hardware solution when = >there is a payback. >Your mileage and experiences may differ. > >So, when you do software encryption (such as for DDR), how much more = >processor time do you see? (over a standard DDR disk to tape) >Double? Tripple? 10X?
My guess is s/w encryption will take several times more processor. Remember that the data has to be compressed first before it is encrypted. Encrypted data does not compress well it at all... Try turning on VSAM compression on an IDCAMS backup and see how much more cpu is used just to compress the data... >Tom Duerbusch >THD Consulting Eric Schadow Mainframe Technical Support www.davisvision.com ------------------------------------------------------------------------ The information contained in this communication is intended only for the use of the recipient(s) named above. It may contain information that is privileged or confidential, and may be protected by State and/or Federal Regulations. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication, or any of its contents, is strictly prohibited. If you have received this communication in error, please return it to the sender immediately and delete the original message and any copy of it from your computer system. If you have any questions concerning this message, please contact the sender. ------------------------------------------------------------------------
