If you a create ASM disk-group over SAN or NAS storage and that ASM disk-group disappears, then follow below steps to get those DG's remounted. login as: root email@example.com's password: [root@myasm-12cr2-node1 ~]# oracleasm listdisks ASM LUN1 LUN2 LUN3 LUN4 LUN5 LUN6 LUN7 LUN8 [root@myasm-12cr2-node1 ~]# oracleasm scandisks Reloading disk partitions: done Cleaning any stale ASM… Continue reading How to remount an unmounted ASM Diskgroup?
Here we are going to create a SWAP of 8GB in size. Run commands on your linux host in below sequence. dd if=/dev/zero of=/swapfile bs=1024 count=8388608& chmod 0600 /swapfile mkswap /swapfile -f swapon /swapfile Add below entry in /etc/fstab file and save the file. /swapfile swap swap defaults 0 0… Continue reading How to create SWAP in Linux or Increase SWAP space in Linux
Overview:- I am going to write a series of Blogs on Storage Technologies. This is going to be the introduction to Disk-Level Storage and Storage technologies and its terminology. We will be discussing basic disk and storage architectures as well as storage protocols and common fault tolerance technologies. Let's get started with Part-1 i.e., DISKS.… Continue reading Introduction to Storage Technologies; Part-1
It is important to deliver a well-tested software to ensure that all requirements are implemented and all goals are met. It requires a plan, strategy, and set of principles to be followed to make it happen. Knowledge of these 7 Software Testing Principles will help us understand the software testing process and achieve goals. Here… Continue reading Software Testing Principles; 7 testing rules which every Software Engineer Must Know
Today we are going to see and learn about starting and shutting down an Oracle Database. Pre-requisites:- There are few pre-requisites before we attempt to start or stop a database. The database should exist on the Linux host. ORACLE_SID, ORACLE_HOME, CLASS_PATH and PATH environment variables must be set. How to validate pre-requisites? run command "cat… Continue reading How start and Stop Oracle Database on a Linux host
To configure RMAN CATALOG and Register any Oracle Database to RMAN CATALOG follow below steps:- Definition:- RMANDB = RMAN CATALOG database name ORCL = Target Database we will register with RMAN CATALOG Step 1 Create tablespace, create user and grant permissions on RMANDB. SQL> create tablespace rmancatalog 2 datafile '<PATH>/rmancat.dbf'… Continue reading Configure Oracle Database RMAN Catalog and Register Database to RMAN catalog
Follow below steps to configure static Oracle Database listener. Currently, I do not have any listener configured on my setup and "lsnrctl status" is not showing any result. [grid@ib-auto-sco-asm154 ~]$ lsnrctl status LSNRCTL for Linux: Version 220.127.116.11.0 - Production on 29-AUG-2018 20:03:33 Copyright (c) 1991, 2016, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=ib-auto-sco-asm154)(PORT=1521))) STATUS of… Continue reading Configure Oracle Database Static Listener