>Just about choked on my beer ...
>" Support is planned for up to 4 TB of real memory on a single z/OS 
image.
>This is expected to allow the use of up to 512 GB of real memory on a 
single
>z/OS image on IBM System z9T servers and up to 256 GB on z990 servers."
>Yep - definitely need that. Well, maybe ...

Yes, this will come in handy for some customers. Think of the new 
workloads here: Java (e.g. WebSphere Application Server, Java batch), DB2 
(esp. business intelligence workloads), XML parsing/generating, etc., on a 
massive scale. There are occasions when going past 128 GB could be 
helpful, even for a single image.

The 4 TB is an interesting figure. That's adding 5 bits worth of address 
range to the current 128 GB figure, and 5 bits is...odd. Maybe that's 
merely a testing limit? I have no idea.

z/TPF can also benefit from lots of memory at extreme scale transaction 
levels. (It doesn't page.) I think z/TPF already supports all the physical 
memory in the biggest System z9.

For me the new LDAP and XML features, and the Encryption Facility 
statement of direction, were the most interesting parts of the z/OS 1.8 
preview. However, there's lots of interesting stuff in there.

- - - - -
Timothy F. Sipples
Consulting Enterprise Software Architect, z9/zSeries
IBM Japan, Ltd.
E-Mail: [EMAIL PROTECTED]

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