ASM

Grid Clusterware 26ai 2 node RAC upgrade from 19c rolling forward

This is third part of 26ai migration blog. We will upgrade here 2 node Clusterware with ASM in 19c. We will use newest 23.26.1 GoldImages from oracle support. This tutorial showing main steps how to perform upgrade, its not(…)

Oracle DBs and ransomware attacks

By Clemens Bleile I had a discussion with a customer recently about the risk of running into an issue with ransomware encrypting data of Oracle databases. Just to quickly recap on what ransomware is: Wikipedia: Ransomware is a type(…)

Important DBCA Parameter if you plan to use Storage Snapshot Cloning in ASM

I am currently working on a customer project to create database clones using storage snapshots. The advantages are obvious, because using a storage snapshot as a clone not only saves space, but is also extremely fast compared to a full(…)

Creating an Oracle Snapshot Copy PDB on top of ASM

Creating a snapshopt copy Pluggable Database (PDB) on top of Automatic Storage Management (ASM) is not possible, because you need to have a filesystem which supports sparse files. According the following MOS-Note sparse files are supported on Automatic Storage Management(…)

ODA: Move a DB to ASM after migrating from 11g to 19c

Introduction Modern Oracle Database Appliances still support 11gR2, but there are several drawbacks using this old version: if you want/need support for your databases, you should pay for Market Driven Support (11gR2 is even no more under extended support –(…)

Disk usage on ODA – Free MB and usable MB

Introduction Oracle Database Appliances rely on ASM to manage disk redundancy. And ASM is brilliant. Compared to RAID, redundancy is managed at the block level. For NORMAL redundancy, which is similar to RAID1, you need at least 2 disks, but(…)

6 things Oracle could do for a better ODA

Introduction With the latest ODA X8 range, at least 80% of the customers could find an ODA configuration that fits their needs. For the others, either they can’t afford it, either they are already in the(…)

Migrating from ASMLIB to ASMFD

By Mouhamadou Diaw Before Oracle 12.1 the methods used to configure ASM were • udev • asmlib Oracle 12.1 comes with a new method called Oracle ASM Filter Driver (Oracle ASMFD). In Oracle documentation we can(…)

udev rules for ASM devices on RHEL 7

Preparing the storage devices for use with ASM is one of the first tasks you should do. When you do not want to use ASMLib then udev is what you should use for this.

OTN Appreciation Day : ADVM

Tim Hall had the idea that as many people as possible would write a small blog post about their favorite Oracle feature and we all post them on the same day. Here is my favorite feature: ADVM -(…)