Tuning global and local options in the distributed network

As explained in Step 4. Creating and customizing the work directory, when you run the EQQPCS05 sample, global and local options files are created in the end-to-end work directory on USS. Additionally, each distributed agent uses also its own globalopts and localopts files. The following tuning tips apply to some of the options defined locally on each agent.

Global options

If you plan to use the IBM Workload Scheduler time zone feature, ensure that

Timezone enable=yes

is true on every domain manager and agent of the end-to-end with fault-tolerance capabilities configuration.

Local options

Setting the following local options on every distributed agent with the values shown helps improve scheduling performance.

Table 1. Recommended localopts settings on distributed agents

Local option	Value	Notes
bm look	9	This value must be lower than bm read.
mm cache enable	yes
mm cache mailbox	yes
mm cache size	512 bytes for large workloads (250000 jobs) 32 bytes for small and medium workloads (10000-50000 jobs)	Keep the value low if the computer hosting the agent runs on low memory. Unnecessarily large values would reduce the available memory that could be allocated to other processes or applications.
mm start tomserver	yes	If you set the TOPOLOGY POSTPONE keyword to yes so that the end-to-end with fault-tolerance capabilities network is stopped gradually while the Symphony file is being distributed, you must also set this option to yes on the domain managers. The option starts an additional mailman server named server@ on the domain manager with the task to send its communication load upstream to its parent domain via the tomaster pobox. Note: When server@ gets no response from another workstation, it does not unlink from it, but tries to link every 60 seconds (the server@ retry link value is always set to 60 seconds).
wr enable compression	yes	Compress Symphony/Sinfonia if it is 4 MB or larger.
sync level	low