Login or Register to Ask a Question and Join Our Community


Complex Event Processing RSS News

Plan-based Complex Event Detection across Distributed Sources

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Special Forums News, Links, Events and Announcements Complex Event Processing RSS News Plan-based Complex Event Detection across Distributed Sources
# 1  
Old 09-25-2008
Plan-based Complex Event Detection across Distributed Sources
Tim Bass
09-25-2008 09:49 AM
Here is an interesting 2008 paper, Plan-based Complex Event Detection across Distributed Sources.

Abstract
Complex Event Detection (CED) is emerging as a key capability for many monitoring applications such as intrusion detection, sensorbased activity & phenomena tracking, and network monitoring. Existing CED solutions commonly assume centralized availability and processing of all relevant events, and thus incur significant overhead in distributed settings. In this paper, we present and evaluate communication efficient techniques that can efficiently perform CED across distributed event sources.

Our techniques are plan-based: we generate multi-step event acquisition and processing plans that leverage temporal relationships among events and event occurrence statistics to minimize event transmission costs, while meeting application-specific latency expectations. We present an optimal but exponential-time dynamic programming algorithm and two polynomial-time heuristic algorithms, as well as their extensions for detecting multiple complex events with common sub-expressions. We characterize the behavior and performance of our solutions via extensive experimentation on synthetic and real-world data sets using our prototype implementation.

Source...
Login or Register to Ask a Question

Previous Thread | Next Thread
Login or Register to Ask a Question

LEARN ABOUT SUNOS

dat_evd_free

dat_evd_free(3DAT)				     Direct Access Transport Library Functions					dat_evd_free(3DAT)

NAME

       dat_evd_free - destroy an instance of the Event Dispatcher

SYNOPSIS

       cc [ flag... ] file... -ldat [ library... ]
       #include <dat/udat.h>

       DAT_RETURN
	   dat_evd_free (
	   IN	 DAT_EVD_HANDLE    evd_handle
	   )

PARAMETERS

       evd_handle      Handle for an instance of the Event Dispatcher.

DESCRIPTION

       The dat_evd_free() function destroys a specified instance of the Event Dispatcher.

       All  events  on	the  queue  of the specified Event Dispatcher are lost. The destruction of the Event Dispatcher instance does not have any
       effect on any DAT Objects that originated an Event Stream that had fed events to the Event Dispatcher instance. There should  be  no  event
       streams feeding the Event Dispatcher and no threads blocked on the Event Dispatcher when the EVD is being closed as at the time when it was
       created.

       Use of the handle of the destroyed Event Dispatcher in any consequent operation fails.

RETURN VALUES

       DAT_SUCCESS	       The operation was successful.

       DAT_INVALID_HANDLE      The evd_handle parameter is invalid

       DAT_INVALID_STATE       Invalid parameter. There are Event Streams associated with the Event Dispatcher feeding it.

USAGE

       Consumers are advised to destroy all Objects that originate Event Streams that feed an instance of the Event Dispatcher	before	destroying
       it. An exception to this rule is Event Dispatchers of an IA.

       Freeing an IA automatically destroys all Objects associated with it directly and indirectly, including Event Dispatchers.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard: uDAPL, 1.1, 1.2    |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Unsafe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       libdat(3LIB), attributes(5)

SunOS 5.10							    16 Jul 2004 						dat_evd_free(3DAT)