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Issue Description: When I tried to rebuild one of the indexes I received the following error: SQL> alter index I_WRI$_OPTSTAT_H_ST rebuild; alter index I_WRI$_OPTSTAT_H_ST rebuild * ERROR at line 1: ORA-00604: error occurred at recursive SQL level 1 ORA-01502: index 'SYS.I_WRI$_OPTSTAT_IND_OBJ#_ST' or partition of such index is in unusable state.

What is Multi-tier Architecture? Multi-tier architecture means application is separated into multiple or n number of tiers. It is a client-server architecture in which presentation, application processing, and data management functions are physically separated.

The kernel was named as Linux kernel. By collaborating this kernel with the GNU applications, a complete UNIX like os was developed and that is called Linux OS.

Desktop Virtualization software VMware Workstation: - 1999, the first product launched by VMware. This software suite allows users to run multiple instances of x86 or x86-64 -compatible operating systems on a single physical PC. Latest version is Vmware Workstation Pro v12 as of 2016. VMware Fusion: - It provides similar functionality for users of the Intel Mac platform, along with full compatibility with virtual machines created by other VMware products. VMware Player: - It was a freeware for non-commercial use. It doesn't require any license purchase just like VMware Workstation or VMware Fusion. If needed Vmware player also available for commercial use with permission. Note: Vmware player doesn't have full-fledged functionality that of VMware workstation. Vmware player and Vmware workstation version are never the same. Player 7 coexisted with Workstation 11. After version 7.10, VMware Player was replaced by VMware Workstation Player version 12. It is falling short of some of the features of full Workstation Pro. Server virtualization software VMware has produced two virtualization products for servers: VMware vSphere (also called "ESXi") An enterprise-level product, can deliver greater performance than the freeware VMware Server, due to lower system overhead. VMware ESXi, as a "bare-metal" product, runs directly on the server hardware. It allows virtual servers also to use hardware more or less directly. In addition, VMware ESXi integrates into VMware vCenter, which offers extra services VMware Server (formerly called "GSX Server"; obsolete as of 2011) It was also provided free of charge for non-commercial use, like VMware Player, and can also set up virtual machines. As a "hosted" application, VMware Server runs within an existing Linux or Windows operating system. Cloud management software VMware vRealize Suite - a cloud management platform purpose-built for the hybrid cloud. VMware EVO SDDC - EVO SDD

Getting started with Cognos Framework Manager Framework Manager is a metadata modeling tool that drives query generation for IBM Cognos software. A model is a collection of metadata that includes physical information and business information for one or more data sources. Whenever we start creating a model, we need to understand the requirement first and then we can choose whether to go for star schema or snowflake schema or just a relational schema. While creating a framework manager metadata model we will come across the below terms: Project: A project contains a model, namespaces, packages, data sources, and related information for maintaining and sharing model information. The project will be saved as a .cpf file and an XML file which defines the project. Different terms associated with Framework Manager: Models: Model contains your dimension tables, fact tables, and the related join information. A framework manager model is a metadata layer between your database and the reporting applications. Using Model, we can create dimension tables, fact tables and even create filters. Namespace: A namespace uniquely identifies query items, dimensions, query subjects, and other objects. You import different databases into separate namespaces to avoid duplicate names. Packages: A package is a subset of the dimensions, query subjects, and other objects defined in the project. A package is what is actually published to the IBM Cognos BI server, and it is used to create reports, analyses, and ad hoc queries. Dimensions: A dimension is a broad grouping of data about a major aspect of a business, such as products, dates, or markets. Query Subjects: A query subject is a set of query items that have an inherent relationship. In most cases, query subjects behave like tables. Query subjects produce the same set of rows regardless of which columns were queried. There are different types of query subjects which we can learn going further. Query Items: A query it

What is Autosys? In simple terms, Autosys is an automated job control system for scheduling,monitoring and reporting jobs. The jobs can reside on an Autosys configured machine attached to a network. Before getting more details about autosys, let's try to understand some basics terms of it. Let's understand, What is meant by Job on a system? The job is nothing but a particular activity on a system. For Example, I want to copy a particular file on Unix/Windows machine from one directory to another one. This is considered as activity/task. It involves a manual process of executing a command on that machine. But using (cron job or Windows-AT) we can automate it based on time. What is Cron tab & Windows-AT? Explain about them? One may have a question why we require a third party software when this can be achieved through cron Utility in Unix. Cron indeed a feature available in Unix but still it lacks some of the functionalities like job dependencies, run window,calendar features(You will learn about these in coming sessions) Why do we need Autosys? As we have discussed above, most basic job scheduling is done using Unix - cron (or windows - AT), which is time-based. It will fire the job based on the clock. However, in real business, you need to fire jobs not just based on scheduled time, but also based on events (like an arrival of a file), and, based on the success or failure of other jobs. Autosys is a total job scheduling solution that allows you to define these events, dependencies, time schedules, alerts, etc, making it a complete data center automation tool. A reliable, easy to use the system that enables the user to completely manage their entire Job Processing requirements. This is a product from Computer Associates. What is an Autosys-job? An autosys job can be, A single command executed on a validated machine, (command, in turn, could have multiple tasks). Autosys-jobs can

Step by Step Procedure for registration & download: To download Redhat Enterprise Linux Register at https://access.redhat.com/. Click the login button on the right side top corner of the window. After clicking on register enter your details and create an account for yourself.

This command is used modify the user attributes like user id, group, name etc. Syntax: Usermod [options] username The following are the list of options to modify already existing user attributes. -d this option is used to change the working directory of the user -g this option is used to change the primary group of the user -G this option is used to change the secondary group of the user -L this option is used to lock the user account. -U this option is used to unlock the user account. -s this option is used to assign shell to the user. -e this option is used to assign specific expiry date to the particular user. -u this option is used to modify the user id of the user. -l this option is used to modify the login name of the user. -c this option is used to change the comment or assign the comment to the particular user.

Create-Modify-Delete-users-in-Linux-Unix One of the day to day activity for any Linux/UNIX admin is to create new user and modify their attributes as per the end user requirements. Below is the list of Linux commands that we use for user administration. useradd ---- For adding a new user usermod---- For modifying user attributes userdel------ For removing user from Linux machine.

Introducing Visual Studio About Visual Studio: Visual Studio is nothing but the Visual IDE (Integrated Development Environment), which is needed to development applications with .NET Framework. .NET Framework is execution environment of .Net Programs where as VS.NET is just an editor tool used to write .Net code or develop applications using .net framework.

The Brocade 5100 is an enterprise-class 8 Gbps Fibre Channel switch, It is designed to handle the large-scale SAN requirements of an enterprise, and can also be used to address the SAN requirements of a small & medium level Enterprises.It runs on the inbuilt Fabric Operating System (Fabric OS) and is compatible with other devices on the network like SAN devices , hosts and hubs, which enables seamless connectivity into heterogeneous SAN environments. Because the switch is scalable through additional port activation, It calls a found be used as a Principal switch for a small storage area network (SAN) and continue to use it as a building block as the SAN grows.

MQMD generally stands for "Message Queuing Message Descriptor". It explains the characteristics of application message placed in the queue. Every message in the queue should have MQMD property associated with it. MQMD is set of attributes describing the characteristic of the message. These properties/attributes won't change, irrespective of the type of application which is putting messages. MQMD properties are filled up by either application team or generated by queue manager automatically.

Issue Description: While taking the RMAN Backup, its get failed since the database is not registered in the catalog.

Hard linking a file Let's take a case, We are working on updating particular software packages on Linux machine. And unexpectedly, a couple of important files got deleted by the administrator. During this situations, hard linked files will come handy as a backup. Note: Generally, the hard link file is used for the backup purpose of small and important configuration files like /etc/passwd, /etc/shadow etc. Command Syntax: ln actual-file hard link-file Example: [root@sys2 ~]# ln abclearn hardln [root@sys2 ~]# ls -l hardln -rw-r--r--. 2 root root 16 Jan 28 19:55 hardln [root@sys2 ~]# ls -l abclearn -rw-r--r--. 2 root root 16 Jan 28 19:55 abclearn

What is tablespace? Oracle database are logically divided into one or more tablespaces. An oracle tablespace is a logical entity that contains the physical datafiles. Tablespaces are store in all the usable data of the database and the data in the tablespace are stored in one or more datafiles. Datafiles are Oracle-formatted operating system files. Oracle creates a datafile for a tablespace when you specify the keyword DATAFILE during tablespace creation

A group is a collection of users who can share similar files, privileges, and other system resources. We can bring in users with same privileges and can manage them under one group. This practice makes managing thousands of users in an easy manner. For example, DevAPM →groups of developers for APM applications QAgrp →group of quality analysts in an organization. Wasadm →group of users for administering WAS application instances. etc.

Websphere MQ Basics Tutorial & MQ Setup : Basic components are for MQ Setup Queue Manager, Local Queue, Put Application, Get Application .

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