IBM Z Hardware and Operating Systems Ideas Portal


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BCP_IOS

Showing 51

XCF signaling I/O stalls during IODF ACTIVATION involving thousands of HW changes

XCF signaling I/O stalls during IODF activation On an z/OS image that did NOT issue the HW ACTIVATE-Customer observed that CPU usage for all MASTER address spaces was more than 10 CPs for the RMF Mon 3 interval just before the IOS502I message. Add...
over 2 years ago in z/OS / BCP_IOS 0 Planned for future release

Separate message when configuring CHPID OFFLINE or ONLINE and CHPID is already offline or online

RBC is asking for a separate message when they CONIFG a CHIPD ONLINE or OFFLINE and the CHPID is already in that desired state. Currently, all it says is CONFIG processing is complete. For example:CHPID is ONLINE... CF CHP(85),OFFLINEIEE503I CHP(8...
over 2 years ago in z/OS / BCP_IOS 0 Future consideration

Allow changing a internal MIH value set by MODULE IOSVDPDR and IOSRRRSV

There are some Japanese banking customers who issue VARY dddd,OFFLINE,FORCE command when an I/O timeout occurs on a device which have a redundancy by software (ie. IMS OLDS). As a result, these devices for being no-response are separated out and a...
almost 3 years ago in z/OS / BCP_IOS 0 Future consideration

IO Timing Facility - Page Devices Support

We previously submitted an RFE for I/O Timing Facility (IOT) Page devices support.RFE : https://www.ibm.com/developerworks/rfe/execute?use_case=viewRfe&CR_ID=49685 When we submitted this RFE, we expected the system to enter the non-restartable...
almost 3 years ago in z/OS / BCP_IOS 0 Future consideration

zEDC Authorized Services Managing Module Dynamic Area and History Buffer + Update Documentation

While testing out zEDC authorized services running in synchronous mode on a z15, we noticed pairs of STORAGE OBTAINS/RELEASES surrounding each call to FPZ4ABC, leading to increased CPU time. After opening a PMR, it was revealed that these requests...
almost 3 years ago in z/OS / BCP_IOS 1 Future consideration

Reduce CPU consumption of IOS HyperSwap API address space for a large number of addresses

When executing a reload of the GDPS GEOPARM the IOSHSAPI ( IOS HyperSwap API address space ) consumes a lot of CPU in a short period of time when there is a high number of addresses under GDPS, causing some customer applications to slowdown and ha...
over 3 years ago in z/OS / BCP_IOS 1 Future consideration

Provide a less FORCEful command to deallocate PFIDs.

We recently had an issue with zEDC, see TS004212422, where we needed to deallocate and allocate a PFID from use. As documented in sg24-8259, we had to use CF PFID(xxxx),OFFLINE,FORCE to deallocate the PFID. In my 40 year career, commands with FORC...
over 3 years ago in z/OS / BCP_IOS 0 Future consideration

GDPS Monitoring of Path Availability to Metro Mirror secondary Devices

Availability of channel paths to Metro Mirror secondary devices is crucial in the context of a GDPS HyperSwap. Currently it is possible even with a GDPS planned HyperSwap to swap from devices connected via 8 paths to devices connected via only 1 p...
almost 4 years ago in z/OS / BCP_IOS 7 Future consideration

z/OS HyperSwap and Concurrent Copy

As in RFE ID 141306 suggested by IBM Systems Developer, I'll raise a RFE also for the z/OS Hyperswap component. z/OS Hyperswap should prevent a planned HyperSwap if a concurrent copy session is active. An unplaned HyperSwap should be possible of c...
almost 4 years ago in z/OS / BCP_IOS 0 Future consideration

Health check enhancement for XCF_CDS in a zOS Hyperswap environment managed by CSM

The existing checks XCF_CDS_SPOF and XCF_CDS_SEPARATION don't check in a HyperSwap environment that primary CDSes and alternate CDSes are on separate DASD boxes of different sites. An extention should check the site information of the HyperSwap se...
almost 4 years ago in z/OS / BCP_IOS 1 Future consideration

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