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  2           ‘4ذ5 ن7A90q9ً5ô‌=إ‌=ن7إîî¶¶¶¶ظLogging

The CIMOM infrastructure components will use the Logging Interface to log messages.

Messages will be logged to a standard CIM log file. The location of the log file can be specified using the Configuration framework.

Log Levels
Log messages have an associated Log Level. The Level gives a rough indication about the importance of a log message. The following are the log levels.

CRITICALCritical conditions, such as hard errorsERRORErrorsWARNINGWarning messagesNOTICEConditions that are not error conditions, but should possibly be handled speciallyINFOInformational messages
Logging levels can be activated using the Configuration framework. The Log levels CRITICAL, ERROR and WARNING will be enabled by default.

Configuration Properties for Logging
LOG_LEVEL [ CRITICAL|ERROR|WARNING|NOTICE | INFO ]
LOG_FILE_MAX_SIZE [ in KB ]
LOG_FILE_LOCATION

General Format for Log Messages
Timestamp
Log Level
Detailed Description
Log Message ID

Log Interface

log ( int logLevel, int logMsgID, char* formatString, …)
Tracing

The CIMOM infrastructure components will use the Tracing Interface to provide trace messages that will be helpful in investigating a problem cause.

Tracing can be enabled on a per component basis, E.g. Repository, Configuration framework, Query processor etc.

Trace Levels
Trace messages can be associated with the following levels.

Level 0Error/Exception trace messagesLevel 1Warning trace messagesLevel 2Basic logic flow trace messages (Function Entry/Exit) and minimal data detailLevel 3Intra function logic flow and moderate data detailLevel 4High data detail
Tracing for components and levels can be activated using the Configuration framework.
Configuration Properties for Tracing
TRACE=[ON/OFF]
TRACE_COMPONENT=Components
TRACE_LEVEL=[0|1|2|3|4]
TRACE_FILE

General Format for Trace Messages
Timestamp
Component
Level
Process Name
PID
Thread ID
Detailed Information 

Trace Interface

trace ( int traceComponent, int traceLevel, char* formatString,…)
Issues

How will the CLIs (E.g. WbemExec), Client API, IPC Providers perform Tracing and Logging? Will they log to the same file as CIMOM? Will they log to different files? If they log to the same file, how will the Write operations be synchronized?

How to control IPC Provider Tracing?

How to correlate CIMOM and Provider trace messages? Will MSGID be useful for this purpose?

Will Class name and Method name be part of the Trace Messages? 


Logging and Tracing Infrastructure Specification                                                   Roger Kumpf (roger_kumpf@hp.com)        


Hewlett-Packard Company                       		 Page  PAGE 1               


















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