32 IBM Tivoli Monitoring: Implementation and Performance Optimization for Large Scale Environments
Availability
Availability takes two forms: availability of the platform itself, and availability of the
hub monitoring server as an application running on it.
z/OS is generally viewed as highly available, but with higher exploitation of
Parallel Sysplex®, availability of any single LPAR is less guaranteed than that of
the sysplex. At the limit, any LPAR is expendable because its workload can freely
move to any other LPAR. The risk of viruses and attacks and the frequent
distribution of patches can make Windows platforms less attractive.
ASCII/EBCDIC data conversion
Data conversion refers to the need to convert data moving between ASCII and
EBCDIC machines. If the hub monitoring server and a component sending data
to it are on different platforms, the receiving end of any transmission will need to
convert the data stream to the local character format. Depending on the amount
of traffic, this could become significant.
Note that the entire presentation layer of IBM Tivoli Monitoring runs on ASCII
platforms, so data will eventually have to be converted to ASCII if it is to be
viewed by end users. Data conversion is often overlooked in deciding where to
place the IBM Tivoli Monitoring hub monitoring server.
Event Forwarding
Event Forwarding is intended to simplify the integration between IBM Tivoli
Monitoring and other Tivoli products, specifically the Event Management
components of IBM Tivoli Enterprise Console, Netcool/Omnibus and IBM Tivoli
Business Systems Manager. It is part of a larger integration called Event
Synchronization. This feature is currently not available when running the hub
monitoring server on z/OS.
Although it is possible to forward events to IBM Tivoli Enterprise Console,
Netcool/Omnibus and IBM Tivoli Business Systems Manager from a z/OS hub
monitoring server, the process is more complicated and may require the use of
Workflow Automation (Policies) and additional products such as z/NetView or the
Universal Agent.
Note: For z/OS hub high availability considerations, you can refer to the
"High-Availability HUB TEMS on z/OS" whiteaper at
http://catalog.lotus.com/wps/poral/topal/details?cataog.label=1TW10T
M61.