Yes - 120,000 combination of ESS/MSS/HR/FIN/BW/SRM/CRM ......
no idea about AIX as our implementation was based on Solaris but in terms of infrastructure a lot of it depends on your expected concurrency .... Id recommend with that number of users you use hardware based load balancing (CISCO or such)
Im not the best person to advise on the sizing of backend SAP systems but from a portal perspective you ideally need machines with at least 4 processors and at least 32Gb memory.
In our environment we had a cluster of 8 portal servers (with 3 server instances on each) and a similar number of WebDynpro servers (again WebAS with multiple server instances). As far as patch level is concerned - id recommend at least SP19 although SP21 is the latest available. We started out on SP12 but moved to SP16 before a bulk of the users were rolled out. Again JDK minimum 1.4.2_12 but SAP are currently recommending 1.4.2_16. Then follow the tuning guides very carefully - they really do make a massive difference to performance under load.
Seriously you have a very large environment looming - not something easily discussed in a few lines of forum text. You definately want SAP to QA any proposed architecture - remember that in EP6.0 the max cluster node size (dispatcher and server) is 32. What we found is that the portal / webdynpro layer was adequate for the requirements - but the initial estimate on backend sizes proved way to small - we had to scale up a lot during the project.
Haydn
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