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Tivoli Field Guide - ITM Heartbeat Mechanism: ITM Heartbeat Process and Related Processes
 White paper
 
Abstract
The ITM Middle Layer (DMML) provides a number of ITM applications; e.g. Data Collector,
Heartbeat, and Web Health Console, access to data. All of these depend on ITM DMML knowing
which Framework Endpoints have a working ITM engine on them. This is done by ITM
maintaining a Middle Layer endpoint cache on each Managed Node, which has a Gateway
installed on it, referred to as the epcache.db. This epcache.db is used by the ITM applications to
access ITM engines on their Framework Endpoint correctly; this is done via the DMML Request
Manager process, and in the case of the ITM Heartbeat, which Endpoints are to be monitor for
their health from that Managed Node.
The purpose of this paper is to provide a detail understanding of how the ITM Heartbeat
Mechanism works. In doing this the paper will describe aspect of ITM which have a bearing on
this mechanism and also cover processes and CLI that influence the way in which the Heartbeat
Mechanism behaves.
Therefore the paper will cover the epcache.db, what affects it (events, processes and CLIs), the
DMML Request Manager process, and the DMML Heartbeat process, which contains the
Heartbeat Mechanism amongst other functions.
All descriptions and trace examples provided are for 5.1.2 ITM FP05 level of the Product, and can
not be guaranteed to reflect the Product in future versions, as these may change how aspect of
the Product work to resolve issues, which may include necessary design changes.
 
 
tfg_ITM_heartbeat_mechanism.1.0.pdf
 
 

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Document information
 Product categories:
 Software
 Systems and Asset Management
 Application Performance & Availability
 IBM Tivoli Monitoring
 Operating system(s):
  Platform Independent
 Software version:
  5.1.2
 Reference #:
  7006597
 IBM Group:
 Software Group
 Modified date:
 2005-09-12

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