Fractured block found during backing up datafile

This error means that RMAN found an inconsistent block during the backup of a datafile. It is quite likely that on second attempt to read the block, RMAN is able to find a consistent image of the block, hence no further action would be required. But, if you need to perform a block recovery, this article will be worth reading. Alert log file will show message similar to the following when this error is reported.

ASM Disk not Accessible and not Appearing in V$ASM_DISK

If you are using ASMLib for your ASM storage and it is working perfectly fine; then, after adding a new ASM Disk you suddenly realize that although new disk is being listed by “oracleasm listdisks” command, it is still not appearing in V$ASM_DISK view. As a result, you are not able to add this new disk in your diskgroup because disk is not accessible to ASM instance. One reason of this could be that ASMLib configuration is not as it should be. Reasons could be: OS patching, oracleasm kernel driver update etc.

Installing Oracle 12c R2 Grid Infrastructure on Linux 6 and Linux 7

You need to install 12c R2 Grid Infrastructure (for a standalone server) software in order to use ASM and/or Oracle Restart feature. In the following I will explain how to install GI for a standalone server on Linux 6 and Linux 7. You must use at least Linux 6.4 for installation on Linux 6. For this installation, I am using Oracle Linux 7. 

There are only a couple of differences between the installation procedures on Linux 6 and Linux 7 which I will mention along the way.

Creating Weblogic Domain for Weblogic Server

After the installationof weblogic server, next step is to create a new weblogic domain. If you have installed weblogic server with examples, there will be a domain already configured during the installation and an application deployed. For the creation of other domain(s), you may follow the steps explained in this article.

Installing Weblogic Server 12.2 on Linux 6 Linux 7 and Windows

If you want to install full Fusion Middleware, this article will help you, otherwise keep reading this article if you wish to install weblogic server only. In this article I will explain how to install Weblogic and Coherence that is used to deploy Java applications. I did this installation on Linux, but same steps can be followed to install the weblogic server on Windows platform.

Starting and Stopping Weblogic Server

After you have created a weblogic domain for Fusion Middleware, or a weblogic domain for Weblogc Server, next step is to start the weblogic components that include node manager, administration server and managed server.

Starting Node Manager

First we start the node manager. Use following method to start the node manager. For this example, $DOMAIN_HOME is pointing to /home/oracle/config/domains

Creating Weblogic Domain for Fusion Middleware

After we have installed the Fusion Middleware and completed its initial configuration, next step is to configure a weblogic domain. A weblogic domain is a logically related group of weblogic resources. Once we create a domain, and Administration Server instance is also gets created that is used to manage this domain. After this, we can add Managed Servers using this Administration Server by logging into the Administration Server using an admin user account through a console. Web Applications are then deployed on to the managed server(s). We can create multiple managed servers to work as a cluster for load balancing and fault tolerance

Initial Configuration of Fusion Middleware after the Installation

After completing Fusion Middleware installation installation, next step is initial configuration of the it. If you have done Fusion Middleware Installation, you would need to configure certain schemas (this is not needed for Weblogic and Coherence installation using generic installer) before you can create domains and start using Fusion Middleware. Click here for the official documentation.
Following are the schemas that need to be created

ORA-02095: specified initialization parameter cannot be modified

This is a generic error message that may be returned while setting an initialization parameter. There are a few other error messages that we may face and in this article, I would discuss those error messages as well. The most common reason of this error message is modifying a parameter using ALTER SYSTEM command that is not dynamically modifiable. In this case, we need to set the parameter in spfile, or pfile, and then a re-bounce of the instance would set the value of this parameter in the instance.

Installing Oracle Fusion Middleware 12.2 on Linux 6, Linux 7 and Windows

Oracle Fusion Middleware contains many products, tools, and services, and provides facility of using Java EE and developer tools, integration services, identity services, business intelligence and several other Oracle products.
In this article I would demonstrate how to install Oracle Fusion Middleware 12.2 (I am using 12.2.1.2.0 for this article) on Linux 6 and Linux 7. Following is the official document that I used while writing this article.

http://docs.oracle.com/middleware/12212/lcm/WLSIG/GUID-E4241C14-42D3-4053-8F83-C748E059607A.htm#WLSIG125