HR Application
The
Environment
A
Human Resource (HR) group application consists of a stand-alone application on a PC, an authentication server
and a database server. End users launch the application
on the PC to start this application. In order to use
this application the user will have to be authenticated
by the AUTH server. Once this is successful then they
get the next screen in which they can enter the staff
information.
The
Problem
All
the users complained that they are not able to use the
application. Since this application was very old, nobody
really knew the interaction between various components.
This resulted in the server group to start investigating if
anything was wrong with the server and the Oracle group
to start working
on the instance. The actual problem was that the
AUTH server (which is used for various authentication
purposes) was down due to a hardware problem and hence
users were not able to login.
How
VCM can help
In
the VCM environment, this problem could have been detected
very easily provided all the servers have VCM
agents running and the HR application rules were
defined to the system. In simple form, the
application can be defined as follows:
HR
Application
authserv:auth process
oraserv:listener process
oraserv:oracle instance HR
Once
the above is defined and configured, any non-availability of
the resource will be detected and notified.
In the
above problem scenario VCM would have flagged the HR
application down due to the non-availability of the
server.
Staff Information System
The
Environment
Staff
information application consists of a web server, an
authentication server and a database server where all the
information of the staff is kept. End users use the
browser to get authentication from the AUTH server and
then they will be able to see their appointment and
pay related information. The web server uses the
IIS ODBC connection pool to connect to the oracle
server and get the information.
The
Problem
Users
complained that they get disconnected intermittently
while working with their information. After weeks of
investigation it was found out that this is caused by
the network switch card . The faulty card on the
switch dropped packets during heavy load. Due to
this the default transaction time exceeded the set
limit, causing the user to get the timeout errors
while working on the application.
How
VCM can help
In the
VCM environment this problem could have been detected if
the application monitoring is configured with the response
time clause between web1 and the Oracle server.
The
definition will be as follows:
Staff
Application
Once
the definition is in place, any abnormal response time
between the web1 and the oraserv would have been
notified to the application admin. In the above case the
response time during the high load on the switch
was very high (due to re-transmissions).
Application Availability
The
Problem
As
a Manager, System Administrator or Application Owner have you
ever wondered what the impact would be if the server is turned
off or a process is
turned off ? Sure, you might have definitely got
complaints from people who are using your server or
process from the server, if the server is down.
How
VCM can help
In
the VCM environment you could have easily found out what
applications would be affected by
shutting down the server or a process (this query can be
performed before shutting down the server or process).
From
the above 2 examples if AUTH server or AUTH process is
shut down, both HR Application and Staff
Information System will be unavailable.
If HR instance is down then
only the HR application will be down, but if oraserv is down
then both applications would be down.
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