Re: ECMODE on in every user directory entry
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Mark, ? Historically the answer is ¡°it depends¡±. The tendency was to leave ECMODE off because it can have a performance impact, so on a big system where you had lots of users, you left it off where possible. However, several products need to have ECMODE ON so you sometimes didn¡¯t have any choice¡. ? I suppose, simplistically with ECMODE OFF CP simulates a ¡°360¡± except of course its not a 360 as there is no ASCII bit¡ When you SET ECMODE ON or have the OPTION ECMODE in the directory, which sets it on at logon, then roughly speaking CP simulates an S/370. Which is why you get a reset when changing the setting¡ It¡¯s the classical function <=> performance trade-off. ? I also understand that the overhead depends on the processor. It may be that on machines with VMA or ECPS it may be less¡. ? Also note that what ECMODE ON does is to change the hardware being emulated by CP. ?CMS itself will still only load BCMODE PSWs¡.. ¡ Finally I would set ECMODE ON via an OPTIONS entry in the directory for IDs used by general users¡.. At some point in the future we will need it. ? Dave ? ? ? ?
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From: [email protected] <[email protected]> On Behalf Of Mark A. Stevens via groups.io
Sent: 30 April 2022 17:44
To: [email protected]
Subject: Re: [h390-vm] ECMODE on in every user directory entry? On Sat, Apr 30, 2022 at 09:44 AM, Mark Waterbury wrote: True, but, CMS normally runs in BC mode.? Just saying ...
So I am confused ... Surprise! It would seem "most" userids don't have the OPTION record, much less the ECMODE parm, but when it is specified, ECMODE is set ON at logon. Hence, if you need ECMODE on, it would be best to have it set in USER DIRECT??
Userid MAINT from USER DIRECT ... and no you can't know my password ;-) I have my own userid (XMAS) which mimics MAINT, and it behaves the same.
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