log_mf_h(3erl)						     Erlang Module Definition						    log_mf_h(3erl)

NAME

       log_mf_h - An Event Handler which Logs Events to Disk

DESCRIPTION

       The  log_mf_h is a gen_event handler module which can be installed in any gen_event process. It logs onto disk all events which are sent to
       an event manager. Each event is written as a binary which makes the logging very fast. However, a tool such as the Report Browser  (  rb  )
       must  be used in order to read the files. The events are written to multiple files. When all files have been used, the first one is re-used
       and overwritten. The directory location, the number of files, and the size of each file are configurable. The directory	will  include  one
       file called index , and report files 1, 2, .... .

EXPORTS

       init(Dir, MaxBytes, MaxFiles)
       init(Dir, MaxBytes, MaxFiles, Pred) -> Args

	      Types  Dir = string()
		     MaxBytes = integer()
		     MaxFiles = 0 < integer() < 256
		     Pred = fun(Event) -> boolean()
		     Event = term()
		     Args = args()

	      Initiates  the  event  handler.  This  function  returns	Args  ,  which should be used in a call to gen_event:add_handler(EventMgr,
	      log_mf_h, Args) .

	      Dir specifies which directory to use for the log files. MaxBytes specifies the size of each individual file. MaxFiles specifies  how
	      many  files  are used. Pred is a predicate function used to filter the events. If no predicate function is specified, all events are
	      logged.

SEE ALSO

       gen_event(3erl) , rb(3erl)

Ericsson AB							   stdlib 1.17.3						    log_mf_h(3erl)