Oracle 20c Data Guard : Standardization of Client-Side Broker Files
In an Oracle 20c Data Guard environment with a broker configured we can have following files called client-side broker files -The observer configuration file : observer.ora -The observer log file -The...
View ArticlePostgreSQL 13 and Patroni 2.0 – when parameters change
Starting with PostgreSQL 13 there is a name and value change of one of the parameters used for the streaming replication of a replica server. Some may already know which parameter I am talking about....
View ArticleIncrease your PostgreSQL databases security by checking a few settings Part 2
Continuing from my first blog we will check some more access and authentication configurations. Focusing on removing unnecessary database privileges. After that we will configure the backend parameters...
View ArticleAmazon DynamoDB: a r(el)ational Glossary
By Franck Pachot . There are many NoSQL databases. And, because SQL is an ISO standard, “No SQL” also means “No Standard”. Many have a similar API and similar objects, but with completely different...
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What is Object Storage?
By Franck Pachot . I’ve always been working with databases. Before the cloud era, the most abstract term was “data”. A variable in memory is data. A file is data. A block of disk contains data. We...
View ArticleDuplicate Database on ODA X4
The ODA X4 is still in use for some customers. The last time I was asked to validate the backups . Let me explain the context. Actually the backups are done via RMAN on local in a NFS share. After...
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Amazon or AWS services?
By Franck Pachot . When I’m writing about a product I like to be precise about the name, the upper and lower case, and even more: do you know that was taking special care of writing Oracle 12cR2 before...
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Amazon Aurora Serverless (PostgreSQL compatibility)
By Franck Pachot . I’ve written a blog post about serverless databases and here is an example of Amazon RDS Aurora PostgreSQL in serverless mode: When I’ve created the instance (15:55 – CloudWatch is...
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VirtualBox issue E_FAIL (0x80004005)
Hi everybody, I get an issue on my VM today , so that I can’t open it anymore. When trying a system restore I get the same state. I was really embarrassed to fail to restore my VM (as a huge work was...
View ArticleUsing PostgreSQL’s adminpack extension to write files
In PostgreSQL you have several ways of working with files and you can find quite some examples here on our blog, e.g. Modifying pg_hba.conf from inside PostgreSQL, Can I do it with PostgreSQL? – 4 –...
View ArticleInstant PostgreSQL Cloning with SUSE and Btrfs
What if you could clone a PostgreSQL database instantly without affecting the original source database, without impacting performance, without any external tool but using your linux Btrfs storage...
View ArticlePostgreSQL 13: Trusted extensions
PostgreSQL 13 is just around the corner and one little, but important feature that was added are trusted extensions. When you want to add an extension to a database you need to be superuser for most of...
View ArticleOracle DML (DELETE) and the Index Clustering Factor
As a consultant working for customers, I’m often in the situation that I have an answer to a problem, but the recommended solution cannot be implemented due to some restrictions. E.g. the...
View ArticleAzure Database for PostgreSQL
This Blog is about some findings on Microsoft’s Azure service for PostgreSQL which I think needed to be noted. Findings about the infrastructure The Microsoft Azure Service for PostgreSQL is using...
View ArticleHow to synchronize the appliance registry metadata on an ODA?
Databases administration on a Bare Metal ODA will be done as root user by running odacli commands : odacli create-database to create a database odacli upgrade-database to upgrade a database between...
View ArticleHow to migrate High Availability databases on an ODA?
Through this blog, I would like to show, with a real customer case, how I have been migrating databases in High Availability environment on an ODA. High Availability using Data Guard for Oracle...
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ODA appliance creation error and cleanup.pl with option force
I had recently faced an interesting issue deploying ODA X8-2-HA. I would like to share my experience here hoping it could help some of you. Error in creating the appliance After reimaging both node0...
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Oracle MAA reference architecture and HA, DR, RTO, RPO
By Franck Pachot . I may have mentioned in some previous blog post that, in my opinion, the names of Oracle Database features make sense on the vendor product management context more than in a user...
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Getting started with Exasol – Setting up an environment
Exasol is an in memory database with parallel processing, or shorter MPP(Massively Parallel Processing) database. I got in touch with some people from Exasol at the DOAG 2019 in Nuremberg but never had...
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Getting started with Exasol – Loading data from PostgreSQL
In the first post of this series we brought up an Exasol test system to have something to play with. Because playing without data is a bit boring this post is about loading data from PostgreSQL to...
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