Hi,

Has anyone had any experience with using the internal coupling channels on a 
z13.  "supposedly" IBM has removed the active wait problems (where the CF lpar 
would try to use 100% of whatever it gets from PR/SM), but I was wondering if 
it's ready for prime time yet.  I have a z13s (single CPU) with 3 LPARs on it, 
they are fairly low use, but I think it'a about time the started to use GRS 
since they share DASD (it was small, but now more and more as time goes on).  
They have been lucky so far, but I would rather not rely on luck.  They don't 
have the cash to add a specialty processor, and if IBM has really reduced the 
overhead of ICF, then it might be a good fit for them.

Anyone using the microcode ICF on a z13 or z14?  If so, does it play well with 
everyone else?

Brian

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