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Mouhamadou Diaw

Mouhamadou Diaw

Oracle 18c: Cluster With Oracle ASM Filter Driver

By | Uncategorized | 5 Comments

During the installation of Oracle Grid Infrastructure, you can optionally enable automated installation and configuration of Oracle ASM Filter Driver for your system with the Configure ASM Filter Driver check box on the Create ASM Disk Group wizard page. When you enable the Configure ASM Filter Driver box, an automated process for Oracle ASMFD is launched during Oracle Grid Infrastructure installation. If Oracle ASMLIB exists on your Linux system, then deinstall Oracle ASMLIB before installing…

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Mouhamadou Diaw

Dbvisit 8 Standby Daemon on Windows

By | Database Administration & Monitoring, Database management | No Comments

In this previous blog, we have installed Dbvisit standby for Windows on both servers. We suppose that the database is created and that the standby is configured (see this blog). The steps are the same that on Linux except that the command is launched on a traditional DOS terminal or a PowerShell. We will not describe these steps (see here for more details). Dbvisit by default will neither send nor apply the archived log files….

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Mouhamadou Diaw

Install Dbvisit 8 on Windows

By | Database Administration & Monitoring, Database management | No Comments

In a previous blog we described how to install dbvisit standby in a Linux box. In this article I am going to describe the installation on a Windows machine. We are using dbvisit 8 and windows server 2016. The name of my servers are winserver1 and winserver2. The first thing you will have to do is to download dbvisit standby package here . A trial key will be sent to you. Before starting the installation…

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Mouhamadou Diaw

Oracle 18c DataGuard with Nologging Mode

By | Database Administration & Monitoring | 3 Comments

With Oracle 18c database nologging has been extended with two new modes: Standby Nologging for Load Performance and Standby Nologging for Data Availability. These modes provide better support for use in an Oracle Active Data Guard environment without significantly increasing the amount of redo generated. In the documentation we can find following definitions: FORCE LOGGING mode prevents any load operation from being performed in a nonlogged manner. This can slow down the load process because…

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Mouhamadou Diaw

Oracle 18c DataGuard : Rman RECOVER STANDBY DATABASE

By | Database Administration & Monitoring | 4 Comments

With Oracle Database 18c, we can now refresh a standby database over the network using one RMAN command, RECOVER STANDBY DATABASE. The RECOVER STANDBY DATABASE command restarts the standby instance, refreshes the control file from the primary database, and automatically renames data files, temp files, and online logs. It restores new data files that were added to the primary database and recovers the standby database up to the current time. When you use the RECOVER…

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Mouhamadou Diaw

Using Oratcptest

By | Database Administration & Monitoring | No Comments

Last day I did some tests with Oratcptest. This a command line tool which can be used to measure network bandwidth and network latency between client and server. In this blog I am going to show how to use this tool in a DataGuard environment. I am using a DataGuard environment with following configuration. Configuration – PROD Protection Mode: MaxAvailability Members: PROD_SITE1 – Primary database PROD_SITE2 – Physical standby database PROD_SITE3 – Physical standby database…

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Mouhamadou Diaw

Database Vault : Rules, Rule Sets and Command Rules

By | Database Administration & Monitoring | No Comments

In a previous blog I talked about protecting data using Realms. With Database Vault we can also protect our database against some SQL statements. These statements can include SELECT, ALTER SYSTEM, database definition language (DDL), and data manipulation language (DML) statements. We can do this with Command Rules. In this blog I am demonstrating how we can use a Command Rule to prevent SYS from creating a new pluggable database in a multitenant environment. Before…

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Mouhamadou Diaw

Oracle Database Vault: Realm in a Pluggable Database

By | Database Administration & Monitoring, Oracle | No Comments

Database Vault can also be used in a multitenant environment. In a multitenant environment we must register Oracle Database Vault in the root first, then after in the PDBs. In this blog we will see how we can use realms to protect data in a pluggable database 12.1. In CDB$ROOT we have to create common accounts that will be used for the Database Vault Owner (DV_OWNER role) and Database Vault Account Manager (DV_ACCTMGR role) accounts….

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Mouhamadou Diaw

DataGuard and Transparent Data Encryption

By | Database Administration & Monitoring, Database management, Oracle | 4 Comments

Setting up a DatagGard environment for a database with Transparent Data Encryption requires some tasks concerning the encryption keys. Otherwise the steps are the same than for an environment without TDE. In this blog we will present the tasks we have to do on both primary and standby servers for the keys. We will not describe the procedure to build the standby database. We will just talk about tasks for the wallet and we will…

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Mouhamadou Diaw

Oracle Virtual Private Database

By | Database Administration & Monitoring | No Comments

Oracle Virtual Private Database (VPD) enables you to dynamically add a WHERE clause in any SQL statement that a user executes. The WHERE clause filters the data the user is allowed to access, based on the identity of a user. This feature restricts row and column level data access by creating a policy that enforces a WHERE clause for all SQL statements that query the database. The WHERE clause allows only users whose identity passes…

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