IBM Z Hardware and Operating Systems Ideas Portal


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Provide more granular control over the maximum number of processes limits

Currently, the maximum number of processes is controlled by the MAXPROCSYS value in BPXPRMxx. There are warnings not to set this value too high as each process has the potential to consume its own address space. This means that MAXPROCSYS should n...
8 months ago in z/OS / USS 1 Not under consideration

ZFS save cpu. Provide option to stop SMF file activity, and eliminate getmain/free main for every open/close SMF record

When I was looking into Java was so slow on z/OS compared to Ubuntu, I noticed there was an SMF call for every file open ( and close) , and a getmain/freemain as well. To start z/OSMF took over 600 seconds of CPU! This needs to come down to about ...
9 months ago in z/OS / USS 1 Not under consideration

Customer needs to map up to one million shared mutex/shared condvar per shared memory segment under z/OS Unix.

Customer running an app that hit an internal limit (JRSMCMaxCntSeg 65535 decimal)) creating shared mutex and shared convars. Discussions with the customer indicate that there is a need to support one million of these type of structures. This will ...
9 months ago in z/OS / USS 0 Future consideration

Use SETOMVS SYNTAXCHECK on libraries other than the current PARMLIB

We can use the SETOMVS SYNTAXCHECK command to check our BPXPRMxx member in the current PARMLIB concatenation. However, most errors occur during IPL time with an updated version of these members, which might be on a different data set or even a dif...
10 months ago in z/OS / USS 0 Future consideration

Simplified MNTE_SYSLIST syntax as part of z/OS UNIX REXX mount command

Currently, if a user would like to include MNTE_SYSLIST as a parm in his USS REXX mount command implementation, the user must code the MNTE_SYSLIST as though they are writing assembler code using the mapping described in BPXYMNTE: MNTENTSYSLISTNUM...
10 months ago in z/OS / USS 0 Future consideration

BPXF029E return codes for failed ROOT mount when ZFS is not initialized

Recently, we were supposed to remove/comment the FILESYSTYPE TYPE(HFS) statement in our BPXPRMxx, but instead we made the following mistake: FILESYSTYPE TYPE(ZFS) /* Filesystem type ZFS */ ENTRYPOINT(GFUAINIT) /* Entrypoint for defining ZFS */ /* ...
11 months ago in z/OS / USS 1 Future consideration

BPX SYNTAXCHECK validation of FILESYSTYPE

As part of the work to migrate systems to z/OS 2.5, I believe many customers are converting HFS files to ZFS, and removing the related HFS definitions from BPXPRMxx. Recently we made a mistake of changing the FILESYSTYPE TYPE(HFS) statement to TYP...
11 months ago in z/OS / USS 0 Future consideration

Script execution entries.

It would be helpful to identify what scripts have executed in OMVS. Helps to resolve issue wrt to sript execution or failures chekcing.
about 1 year ago in z/OS / USS 1 Not under consideration

Support for include/exclude lists in automount facility

We'd like the ability to select/exclude which systems are assigned automove=Y automounted file systems in the /etc/u.map parameter file.
about 1 year ago in z/OS / USS 0 Future consideration

BPXWMIGF Swap Enhancement

I'd like the ability for the bpxwmigf migration tool to quiese the source file system at the end of the copy to target file system process so that the swap can safely be performed even if the source file system is actively being written to or read...
about 1 year ago in z/OS / USS 0 Future consideration

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