Weblogic 14c Installation prerequisites

 Verify the Requirements of the Certification:

The certification document should be used to verify that the requirements of the certification are met. For example, if the certification document indicates that your product is certified for installation on Oracle Linux 7, this document should be used to verify that your Oracle Linux 7 system has met the required minimum specifications, such as disk space, available memory, specific platform packages and patches, and other operating system-specific items.

https://www.oracle.com/middleware/technologies/fusion-certification.html

Processor Requirements:

Oracle WebLogic Server and Coherence requires a minimum 1-GHz CPU.

Java Development Kit (JDK) Requirements:

To run installers in the 14c (14.1.1.0.0), you must have a certified JDK already installed on your system. For Example JDK 8 or JDK 11 for weblogic 14c

General Memory and Disk Space Requirements:

Memory requirements fall into two categories: physical memory (the amount of physical RAM installed on host) and the minimum available memory, which includes swap space in addition to the physical memory.

Note:Oracle recommends that for the performance of well-scaled production environments, the total Java heap memory allocations for all the Managed Servers per host add up to no more than 50% of the total physical memory on the host. If larger JVM heap sizes are required, or more managed servers are needed, physical memory should be increased accordingly.

Operating System	Minimum Physical Memory Required	Minimum Available Memory Required
Linux	4 GB	8 GB
UNIX	4 GB	8 GB
Windows	4 GB	8 GB

Considering the Impact of Open File and Process Limits on Memory Requirements:

When determining the memory requirements for a production environment, you should also take into account other operating system settings, including the number of file descriptors (open files) allowed per process and the number of processes required for each product or service that is targeted to a Managed Server.

You can see how many files are open with the following command

/usr/sbin/lsof | wc -l

563

To check your open file limits, use the commands below.

ulimit -n

1024

Setting the Operating System Open File and Processes Limit

1)Log in as root and edit the following file:

/etc/security/limits.conf

2)Add the following lines to the limits.conf file.

Copy* soft  nofile  4096

* hard  nofile  65536

* soft  nproc   2047

* hard  nproc   16384

The nofiles values represent the open file limit; the nproc values represent the number of processes limit.

3)Save the changes, close the limits.conf file.

If you are running Oracle Enterprise Linux 6 or Red Hat Linux 6, locate the following operating system configuration file:

4)Copy/etc/security/limits.d/90-nproc.conf

Make sure the same values are added to the 90-nproc.conf file; otherwise, the values in the 90-nproc.conf file can override the values in the limits.conf file.

5)Reboot the host computer.

Temporary Disk Space Requirements:

The installation program uses a temporary directory into which it extracts the files that are needed to install the software on the target system. During the installation process, your temporary directory must contain sufficient space to accommodate the compressed Java Run-time Environment (JRE) bundled with the installation program and an uncompressed copy of the JRE that is expanded into the temporary directory. The extracted files are deleted from the temporary directory after the installation process. The files in the temporary directory require approximately 2.5 times the space that is ultimately required for the installation.

While running the Oracle WebLogic Server installer for Windows, run the following command incase if you want to change the tmp location

java -Djava.io.tmpdir=<tmpdirpath> -jar fmw_14.1.1.0.0_wls.jar

Oracle WebLogic Server and Coherence Disk Space Requirements:

A Oracle WebLogic Server and Coherence installation using the Oracle WebLogic Server generic installer requires approximately 1.1 GB of disk space. The amount may vary by operating system. Installation size may be reduced by using the Oracle WebLogic Server lite, quick, or slim installers, or by using Coherence-only installers.

Network Requirements:

Typically, the computer on which you want to install Oracle WebLogic Server and Coherence is connected to the network.

Guidelines for a Correct Format of Entries in the /etc/hosts File:

To ensure that both forward lookup (find the IP address given the hostname) and reverse lookup (finding the hostname given the IP address) return the same results, make sure your /etc/hosts file is formatted correctly using the following guidelines:

1) The host name may contain only alphanumeric characters, hyphen, and period. The name must begin with an alphabetic character and end with an alphanumeric character.

2) Host names should be specified as fully qualified host names (host name with the appended domain name).

3) Lines cannot start with a blank space or tab character, but fields may be separated by any number of space or tab characters.

4) Comments are allowed and designated by a pound sign (#) preceding the comment text.

5) Trailing blank and tab characters are allowed.

6) Blank line entries are allowed.

7) Only one host entry per line is allowed.

Understanding IPv6 and Oracle Weblogic Server and Coherence:

Oracle Weblogic Server and Coherence support Internet Protocol Version 4 (IPv4) and Internet Protocol Version 6 (IPv6.) Among other features, IPv6 supports a larger address space (128 bits) than IPv4 (32 bits), providing an exponential increase in the number of computers that can be addressable on the Web.

An IPv6 address is expressed as 8 groups of 4 hexadecimal digits. For example:

2001:0db8:85a3:08d3:1319:8a2e:0370:7334

OS Requirements:

check the oracle support guidelines for Operating system requirements

DataBase Requrirements:

Find a certified Database from oracle support documentation

https://www.oracle.com/middleware/technologies/fusion-certification.html