Clark Morris is entitled to have and to express his [not at all disinterested] views.
His question <begin snippet> Does i-o on system z take less cpu and memory resource than i-o on Intel servers?, p servers? <end snippet/> is, however, challenging to this entitlement. The answer to this question is yes. z/Architecture channel-based I/O is very different from that used by, for example, Intel servers. In particular it uses many fewer cp[u] cycles, and its permits many independent I/O operations to be executed concurrently and asynchronously. Can it really be the case that Mr Morris is unaware of these differences? Or was his question disingenuous? In passing, let me not that 'cpu' is/was an acronym for central processing unit; and 'unit' implies singularity. Mainframes now often, even usually, have more than one CP, (central processor) or, if a three-character acronym is required, CPE (central processing element). John Gilmore, Ashland, MA 01721 - USA ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
