Oracle RMAN : Incremental Backups

In Previous articles we have discussed, RMAN Introduction  and started with RMAN commands and first backup. Now we will discuss more about incremental backups. For large databases taking full backup is not possible every time as...

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Oracle : Starting with RMAN Commands

In previous article we have discussed introduction to RMAN, Now will learn RMAN commands and taking backup of database and understanding its output. RMAN is very easy tool to interact with, it understand simple English language. If we want to take backup then just type backup in RMAN prompt along with whether backup of database or tablespace, so...

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ORA-00265: instance recovery required, cannot set ARCHIVELOG mode

I was trying to convert my noarchivelog database to archive log, I got below error. My database was running so I started my database in mount stage using force mount and then tried alter database archivelog, it failed with error ORA-00265 SQL> startup force mount ORACLE instance started. Total System Global Area  805306368 bytes Fixed Size ...

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Oracle : RMAN Introduction

In this article we will discuss RMAN - Recovery Manager in detail with its architecture, uses and different scenarios of RMAN backup and recovery. This is tool provided by Oracle to handle backup and recovery of databases, this is always introduced...

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Data Types in MongoDB

MongoDB supports a wide range of data types as values in documents, we will discuss those below Basic Data Types Documents in MongoDB can be thought of as "JSON-like" in that they are conceptually similar to objects in JavaScript. JSON expressive capability is limited as there are null, Boolean, numeric, string, array, and object. Although...

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