Re: User spaces still limited to 16MB?

The discussion is interesting, but I think to remember from a long time
ago that the entire OS (CPF38,OS400,I5/OS) is build on spaces of maximum
16MB... the space object is the basic object that stores permanent data
to the DASD... and it is brought in MS by pages of 4K... any other
higher level object (*PGM, *FILE, etc...) holds a directory to one or more
internal spaces...
the *USRSPC object gives very fast access to one space with space
pointers..

IMHO, changing the size of the basic user space would mean to entirely
rewrite the OS...
there could be another way, ... changing the *ÜSRSPC object to an higher
level object that would be a directory to the basic space object... but
the disadvantage would be to slow down significantly the access to *USRSPC
and that would change the performance of many products like (BRMS, Power
HA, MIMIX, etc.. that are intensively using user spaces...)

SQL is certainly an alternative to interface with the OS, but I guess the
SQL function uses the user space API (or the list API when available)
under the cover...

so I'd like to ear IBM reacting on this thread ...

Paul




From: Darren Strong <darren@xxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Date: 10/10/2018 15:26
Subject: Re: [SUSPECTED SPAM] Re: User spaces still limited to
16MB?
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



It appears to me that IBM's strategic direction is to move toward SQL
functions that provide the same functionality to APIs, so I suspect that
userspaces may be considered legacy.




From: "Dan" <dan27649@xxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Date: 10/09/2018 04:58 PM
Subject: [SUSPECTED SPAM] Re: User spaces still limited to
16MB?Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



I guess I'm baffled why IBM hasn't addressed this 16MB limitation by now.
It seems that plenty of its APIs have plenty of potential to exceed this
limit. And RPG is no longer limited to 16MB with the teraspace
enhancements from how many releases ago? Has no one ever submitted an RFE
for this?

- Dan