Re: 16 Mb limit - possibly expanded in future?

[Simon Coulter <shc@xxxxxxxxxxxxxxxxx>]

On 18/12/2009, at 9:41 AM, Vern Hamberg wrote:

> User spaces are primary objects used on the iSeries - physical files,
> e.g., comprise several spaces, each of which has a maximum size of  
> 16meg
> - it's how it has been, and a change here might be difficult to work
> through all the interstices of the OS.

Umm, that implies *FILE objects are made up of user spaces which is  
incorrect. *FILE objects contain many spaces but none of them (at  
least last time I looked) are user spaces. User spaces are a  
particular sub-class of the general space object.

An object of type x'19' is a space. User spaces are type x'19' subtype  
x'34'.

A *FILE may contain (or reference) the following space objects:
	o File object (x'1901')
	o Format space (x'1951')
	o Format sharing directory (x'1950')

In addition, it may contain (or reference):
	o Cursor object (x'0D50')
	o Data space (x'0b90')
	o Data space index (x'0c90')

Note that a data space (where the records are stored) is a different  
class of object (type x'0b') from a space (type x'19').

Note also that this list is neither exhaustive or definitive.

Regards,
Simon Coulter.
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