I wouldn't say paging is specially optimized for 3390-3. But, simple example, if you'd need 9GB of paging space, - with 3390/3 you have 3 access paths, CP can do 3 paging operations concurrently - with 3390/9 there is only one access path, hence only 1 paging operation PAV -that assigns more than one address to a given volume- will not halp as CP doesn't se PAV on paging volumes.
So, for high paging rates, the more volumes the better. Kris Buelens 2010/6/21, Florian Bilek <[email protected]>: > Dear all, > > We are intending to migrate from a DS8100 to a new DS8700 and consider to > quit with 3390-3 DASD addresses during this migration. > > I remember that there was always the saying that paging devices should > reside on 3390-3 since the paging code was specially optimized for those > devices, I wanted to verify if this is still valid for z/VM 5.4 and 6.1. In > that case we would still need a range of 3390 devices. > > What would be your recommendation? > > Thank you very much in advance for your feedback. > > -- > Best regards > > Florian > -- Kris Buelens, IBM Belgium, VM customer support
