Usually the parts in a single Diag x250 request are reordered and kept in as few channel programs as possible. However, if alias devices are attached to the system, these channel programs will be issued to the first available base or alias device (for minidisk I/O).
Steve Wilkins z/VM I/O Strategy IBM VM Development |------------> | From: | |------------> >--------------------------------------------------------------------------------------------------------------------------------------------------| |Ronald van der Laan <[email protected]> | >--------------------------------------------------------------------------------------------------------------------------------------------------| |------------> | To: | |------------> >--------------------------------------------------------------------------------------------------------------------------------------------------| |[email protected] | >--------------------------------------------------------------------------------------------------------------------------------------------------| |------------> | Date: | |------------> >--------------------------------------------------------------------------------------------------------------------------------------------------| |03/30/2009 11:17 PM | >--------------------------------------------------------------------------------------------------------------------------------------------------| |------------> | Subject: | |------------> >--------------------------------------------------------------------------------------------------------------------------------------------------| |Re: Diagnose x'250' / z/VM I/O scheduling | >--------------------------------------------------------------------------------------------------------------------------------------------------| Steve, Does that mean that CP will take the Diag280 I/O apart and move the separate parts out over multiple alias devices (when available of course)? Ronald van der Laan
