Remote Journal Filtering Reduces Network Traffic

Remote Journaling has been available on IBM i for many releases. It provides an efficient way to replicate journal entries from one system to another and is often part of a high availability or disaster recovery solution. As HA and DR have become a high priority in recent years, remote journaling has become more heavily used and multiple enhancements have been made in recent releases.

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Additional Work Management Controls

The work-management team recently made available some changes with PTFs to help control the behavior of job creation for cases when a program may get in a loop submitting jobs. The change made with the PTF is to slow down the creation of new jobs when the system is approaching the limit for the maximum number of jobs (QMAXJOB system value).  This support is in the base operating system in 7.1 and later releases.

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Use Subsystems With Many Devices

For those of you with larger environments where you may have hundreds to thousands of users on a single partition, you’re probably aware of the old recommendation to spread the allocation of those devices across multiple subsystems by using workstation entries or communications device entries. The IBM-documented recommendation was no more than 250-300 devices per subsystem. The communications-device issue has generally resolved itself since fewer shops are using SNA today, and TCP/IP communications support doesn’t use communications devices.

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Remove Disk Units Without an IPL

It’s tough to make the new release highlights list. A valuable capability that will help reduce planned outages that didn’t make the cut for IBM i 7.1 announcement highlights is the capability to remove disk units from the partition without requiring an IPL or going into restricted state. While it’s documented in the Knowledge Center, you most likely wouldn’t find it if you didn’t know to go look for it. 

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