is Grid Computing?
Computing, a user doesn’t care where computing occurs. Users request
information or computation and have it delivered.
They don’t care where or how the request was given. This is, of
course, a “client-side” view. On the other hand, from the
“server-side,” the Oracle Grid is about resource allocation, information
sharing, and high availability.
is Oracle Ecosystem?
are integrated communities of related Oracle components such as application
All Oracle Application servers, Oracle Databases, and Oracle collaboration
Suite that they are functioning as a unit.
RAC stands for
Real Application Clusters. It distributes database workload among multiple
ASM stands for
Automatic Storage Management. It manages disk I/O to easily accessed and
balanced across disk groups. It is like a Volume Manager.
ASLM stands for
Application Service Level Monitoring. It monitors the overall health of an
application server and Oracle database.
is Oracle Enterprise Manager 10g Grid Control?
It monitors and
manages farm/cluster, application server, Oracle WebCache, Oracle HTTP Server,
Oracle Containers for J2EE, Single Sign-On, Portal, Wireless, Business
Intelligence, and host targets.
are the Grid Control Components?
The following are
the Oracle Enterprise manager Grid Control components:
Oracle Management Repository (OMR) – It is a container. It is
a collection of schema objects within an Oracle database. It contains
SYSMAN’s schema objects. The OMR database listener monitors port 1521 by
default for any incoming connection requests.
Oracle Management Service (OMS) – It receives information from
OMA and passes them to OMR. It provides the Grid Control console Web pages
from information within the OMR. It includes Oracle HTTP Server (OHS), Oracle
Application Server containers for J2EE (OC4J), and OracleAS Web Cache.
OracleAS Web Cache is configured to listen on port 7777 and OHS listens on
port 7778 for connection by default.
Oracle Management Agent (OMA) – You need one OMA for each host
server. It must be in its own ORACLE_HOME. It
collects information about target availability, configuration, and performance
and passes that information to OMS. In most installation, the OHS listens to
OMA traffic on port 4889 by default.
to access the Grid Control console?
You use Web
browser. (http://<oms host>.<domain>:<port>/em) For example:
are the Grid Control Console components?
Home – It shows a big picture
of system availability, alerts, jobs, and status of targets.
Targets – It shows the status
of targets such as hosts, databases, applications servers, Web
applications, groups, and a global view called “all targets.”
Deployments – It shows the
software and hardware deployments including their patches. It manages
configuration policies to ensure that you comply with generally accepted
It shows and monitors the status of targets.
Jobs – It shows, schedules
and executes user’s or administrator’s jobs.
Management System – It shows
an overview of performance of your ecosystem.
It is a wireless
device for Oracle database administrators to perform their task remotely.
can I customize my Grid Control posts by using a static ports file?
You can use the
staticports.ini file to customize your ports when you install OEM.
Numbers and Ranges (Grouped by Component)
can I install the Oracle OMA component?
The OMA –
Oracle management Agent connects the OMS to managed targets. We should install
the OMA on every managed target host.
There are three
ways to install the OMA.
Using the Oracle Product CDs (Interactively). It is the same is
regular Oracle installation. $ /stage/Disk1/runInstaller.
Using the batch process (Silent Installation).
It is the same as above but in silence no interaction. $ /stage/Disk1/runInstaller
–responseFile ./agent.rsp –silent doDiscovery=True startAgent=TRUE (you
can find the sample response file in the $ORALCE_HOME/install directory.
Using the OMS process (On Demand). You don’t need the Oracle
product CDs. Go to each server and use its browser and type:
http://oms-servername:4889/agent_download and then select the OMA. Make sure
that the wget utilize is in /usr/local/bin/wget. If not, then make a link for
it. For example: $ ln –s /usr/bin/wget /usr/local/bin/wget.
You should make a new directory for the OMA before doing anything. Then
are the Key Configuration files for the OMA?
configuration files for the OMA are:
OMA log and trace files)
to start and stop the OMA?
to start: # $AGENT_HOME/bin/emctl start agent
to stop: # $AGENT_HOME/bin/emctl stop agent
It is command
line utility to control the OMS. It stands for Oracle Process Monitor and
Notification control. The following are some of examples of how to manipulate
the OMS components.
startall -- starts
all components of OMS.
# opmnctl stopall
-- stops all components of OMS.
startproc ias-component=OC4J --
starts OC4J component
stopproc ias-component=OC4J --
stops OC4J component
# opmnctl status
– l – show OMS status components.
It is the
Enterprise Manger Control Utility (emctl). Like opmnctl, it starts and stops
the OMS components. Notice that emctl does not start or stop OracleAS Web
If OracleAS Web
Cache is on then you can access to OEM by: http://oms-server:7777/em and with
no OracleAS Web Cache, you need to directly connect to the OHS:
The following are
some of examples of how to manipulate the OMS components using emctl.
# emctl start oms
-- start oms components except web cache.
# emctl stop oms
-- stop …
# emctl status
oms -- show the status of oms
# emctl start
iasconsole – starts an individual component
# emctl stop
iasconsole -- stop and …
We use blackouts
to suspend target monitoring, schedule maintenance periods for these targets.
This will prevents unnecessary alerts from being sent while a target is down
are the differences between Application Server Control and Grid Control?
Grid control needs to be installed separately but Application
Server control will be installed the same time that you install OracleAS.
Grid has the OMS and the Oracle Application Server control has
Grid has may target type but the Oracle Server Control only has
With the Oracle Application Server Control, you can do server
configuration but you can not do this with the Grid Control.
Both can do application configuration.
The application server control is Farm/cluster aware but not
With Grid control you can do Group, Historical Monitoring and
Alerts, Application Service Level management, Job system, Configuration
management, Mobil access via EM2GO. But you can not do any of the above
function by Application Server Control.
do we access to Grid control and Application Server control?
to access to Grid control: http://oms-server:7777/em
to access to Application Server control:
are J2EE and OC4J?
Think of J2EE as
an application and OC4J as an instance. You deploy the J2EE applications to
the OC4J instance.
are the Oracle configurations Infrastructure Services?
Identity Management: It provides Internet Directory (OID) and
Single Sign-On capabilities.
Central Management: It centrally manages an application server
instance with a separately installed Oracle management Agent (OMA).
Oracle Application Server Clusters: It manages multiple
instances using one database repository. You can configure a J2EE and Web
Cache instance to use a metadata repository.
can I access to the Oracle Application Server Topology?
- or -
can I deploy an OC4J Application?
Create an OC4J instance: On the Application Server Control Home
page, click create OC4J instance. Then enter instance name, and click Create.
Add a data source: Select the create instance. Click the
Administration tab; and under Application Defaults, select Data Sources and
click Create. Enter the application data source information, and then click
Deploy a J2EE application: Click Application, from the created
instance. Click Deploy EAR file. Click browse and select the .ear file of the
application you want to deploy. Enter an application name and then click
Now, we can monitor the OC4J application from the Application
is ASLM – Application Service Level Management?
With ASLM, you
manage application availability, monitor application performance, and diagnose
application response-time issues.
Beacons are a
function of the Management Agent. It has responsibility of replaying
transactions at specified time and measure the performance and response times
of the transaction. To create it, click Management system, agents, and select
the agent you want to configure as a beacon.
Select it from the drop-down and then click Go. Once you give it a name
and proxy information, click OK.
to configure Web Applications for monitoring an application?
Do the following
steps to configure Web application for monitoring.
Create the Web application.
Create and assign beacons to Web applications.
Configure end-user response-time monitoring.
Configure middle-tier performance monitoring.
commands an Oracle Database Administrator must know (using default port).
Use the http://<oms
host>:7777 URL with your Web browser to connect to HTTP Server.
Use the ias_admin username to
connect to the OMS.
Use the iSQL*Plus tool if was
installed by using the http://<database host>:5560/isqlpus URL to
connect iSQL*Plus. Make sure that you have started the iSQL*Plus on the
database server (# isqlplusctl start).