Correct any errors noted by the report. For each system that will write to the logrec log stream, do the following calculation:. Target system hardware requirements: You can find the tool at Coupling Facility sizer. Determine if any structures remain in the CF that is being removed from service. Table 1 provides more details about this migration action. Make physical coupling facility LPAR storage changes if necessary to accommodate this.
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Updated structure sizes are necessary to ensure that a performance problem does not occur due to a structure space constraint. If you are migrating to a new CFCC level, do the following: Reference information For more information about coupling facility code levels and the processors that support those levels, see http: In any configuration, the amount of fixed storage required for the coupling facility is based on configuration-dependent factors.
Understanding the coupling facility level (CFLEVEL)
Or, an application might have a requirement for a particular CFLEVEL, but if a coupling facility of that level is not available, might allow its connectors to connect and run, bypassing the architected function provided by the higher CFLEVEL that was unavailable. General Page Alternative methods for calculating required structure sizes based on existing structure sizes.
If you are upgrading your CFCC microcode on one or more CFs, you are confident that your existing structures are adequately sized, and you simply want to know how much they may need to grow to accommodate the same workload at the new CFCC level, you may be able to use the current structure sizes to calculate the new sizes. Report this problem cfsize the system programmer. Other system coexistence or fallback requirements: For other system logger applications, cfsizerr the desired residency time from the documentation for the application.
Structure Strname is too small for full signalling connectivity.
How do I size a Coupling Facility structure for one or more IMS products?
For product help, click on the help link provided on each product page. Disruptive CF Upgrade Use the procedure in Table 1 when the coupling facility image must be reactivated, but the CPC on which the coupling facility resides will remain operational across the reactivation process.
Update the CFRM policy with the new coupling facility size, activate the cfdizer, and then have the operator initiate a rebuild of the structure. Activate the updated CFRM policy so that it becomes the active policy governing structure allocation in the sysplex.
NumberSystems The number of systems active in the sysplex.
The system continues processing. SIZER is useful when you are already confident that your existing structures are adequately sized for their current workload and you simply want to know how csfizer they may need to grow to accommodate the same workload at the new CFCC level. Gather information about the coupling facility structure. Is the migration action required? CFSIZER is useful when you introduce a new workload or application, change an existing workload in cfxizer way, or wish to revalidate your current structure sizes.
Then, verify that no structures remain on the coupling facility about to be upgraded. To use it for that purpose, you must sequence your CF migration so that you have at least one CF cfsiser the current CFCC level and one CF at the new level installed and operational at the same time.
CFSizer Alternate Sizing Techniques
Note that CFSizer calculates 20 list entries required for each list, which is why 20 is the default parameter value for this cfskzer. The command must be issued from all systems in the sysplex; path numbers may be different for each system. Table 1 provides more details about this migration action. Cfskzer, if you are migrating to a new CFCC level. Structure size changes will be pending after the new or modified policy is activated.
Reverify that no structures in the CF and no systems have connectivity to CF.
Also, the updated structure cfsizwr will ensure that there is no issue restarting an application in the future due to invalid structure sizes. General migration action not tied to a specific release.
If the correct CF was selected, consider reviewing the structures still allocated in the CF and seek to move them out of the CF. If you are using cfsiezr facility structures for your log streams, you must specify in the CFRM policy the size of each structure you define.
XCF_SIG_STR_SIZE
Be careful to re-plan so that: To size a structure, click on one of the product links in the drop-down menu e.
You can find the tool at Coupling Facility sizer. For this procedure, pick the value that represents the average size of log blocks generated by cfsize the log streams writing to this coupling facility structure.
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