MySQL Architecture.


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How to create database manually in oracle 11g R2

step.1.go to the cat /etc/oratab and edit it. vi /etc/oratab pankaj:/u01/app/oracle/product/11.2.0/dbhome_1:N step.2.login to oracle user [oracle@servera ~]$ . oraenv ORACLE_SID = [orcl] ? pankaj The Oracle base for ORACLE_HOME=/u01/app/oracle/product/11.2.0/dbhome_1 is /u01/app/oracle note:-. oraenv command hit for oratab and pankaj is name of the database. step.3.copy pfile cd /u01/app/oracle/product/11.2.0/dbhome_1/dbs [oracle@servera dbs]$ cp initorcl.ora initpankaj.ora step.4.edit pfile current pfile orcl.__db_cache_size=289406976 orcl.__java_pool_size=4194304 orcl.__large_pool_size=4194304 orcl.__oracle_base='/u01/app/oracle'#ORACLE_BASE set from environment orcl.__pga_aggregate_target=310378496 orcl.__sga_target=457179136 orcl.__shared_io_pool_size=0 orcl.__shared_pool_size=150994944 orcl.__streams_pool_size=0 *.audit_file_dest='/u01/app/oracle/admin/orcl/adump' *.audit_trail='db' *.compatible='11.2.0.0.0' *.con...
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MySQL Replication Switchover: Step-by-Step Guide

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 MySQL Replication Switchover: Step-by-Step Guide MySQL replication is a powerful feature that allows you to create redundant copies of your database for improved availability and scalability. In certain scenarios, it becomes necessary to switch the roles of the master and slave servers in a replication setup. This article will guide you through the process of performing a MySQL replication switchover, ensuring a smooth transition without any data loss. Let’s dive into the step-by-step instructions. I have tow node one is master node and another is slave node.Given below details:- Current Master: 192.168.70.10 Current Slave : 192.168.70.11 Verifying the Replication:- Before initiating the switchover, it’s important to verify that replication is functioning correctly on the current Slave server (192.168.70.11). Execute the following queries to ensure the replication status: mysql> show slave status\G This command displays the slave’s status, including information such as replicat...
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MongoDB Architecture

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  MongoDB Architecture MongoDB is a popular NoSQL document-oriented database management system, known for its flexibility, high performance, high availability, and multi-storage engines. The term NoSQL means non-relational. It means that MongoDB isn’t based on a table-like relational database structure. It is used by Adobe, Uber, IBM, and Google. In this article, we will delve into the MongoDB architecture, exploring its key components and how they work together. Key Features of MongoDB:- Document-oriented Database Stores data in BSON-like documents. Schema Less database. It provides horizontal scalability with the help of sharding. It provides high availability and redundancy with the help of replication. It allows one to perform operations on the grouped data and get a single result or computed result. It has very high performance. MongoDB Architecture and its Components:- MongoDB’s architecture design involves several important parts that work together to create a strong and fle...
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