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.
ECACCESS-EVENT-GRANT(1p) User Contributed Perl Documentation ECACCESS-EVENT-GRANT(1p)NAME
ecaccess-event-grant - Grant usage of an ECaccess Event
SYNOPSIS
ecaccess-event-grant -version|-help|-manual
ecaccess-event-grant [-debug] [-subscribe] [-notify] event-id user-list
DESCRIPTION
Allow managing the Event permissions for a list of user(s).
The permissions can be either subscribe, notify, both or none. In order to remove permissions to an Event for a list of users use this
command with no -subscribe and -notify options.
ARGUMENTS
event-id
The identifier of the Event to grant.
user-list
The user(s) to give/remove the permissions. Multiple users should be separated by a column (e.g. abc,def).
OPTIONS -subscribe
The user(s) specified in the user-list will be allowed to subscribe to the event-id (e.g. with the -eventIds option of the
ecaccess-job-submit command).
-notify The user(s) specified in the user-list will be allowed to send notifications to the event-id (e.g. with the ecaccess-event-send
command).
-version
Display version number and exits.
-help Print a brief help message and exits.
-manual Prints the manual page and exits.
-debug Display the SOAP messages exchanged.
EXAMPLES
ecaccess-event-grant -subscribe 167 abc,def,jhi
Allow the users abc, def and jhi to subscribe to this Event.
ecaccess-event-grant 167 jkl
Remove all rights to the Event for the user jkl.
SEE ALSO
ecaccess-event-clear, ecaccess-event-delete, ecaccess-event-send, ecaccess-event-list, ecaccess-event-create and ecaccess.
perl v5.14.2 2012-04-16 ECACCESS-EVENT-GRANT(1p)