On Thursday, 12/17/2009 at 12:32 EST, "Schuh, Richard" <rsc...@visa.com> wrote: > I have been asked (cut-and-paste from orig. note), "Is there any drawback to > having the Crypto engines active on a processor even if they won?t be used > there?" This was in relation to a z10 that will be installed in January. Being > as naive in the care and feeding of the Crypto facilities as the one who asked > the question, I thought it best to ask those who might know the answer or, at > least, the questions that I should ask in return. My first guess is that if a > crypto card is installed but unused, it will not have a deleterious affect on > the performance of the system, but will affect the pocketbook.
An unused crypto domain (queue) is a quiet crypto domain. Aside from the control blocks that describe an assigned crypto domain, there is no impact to the system. Alan Altmark z/VM Development IBM Endicott
