Everything our consultants learn while running databases for customers: Oracle, PostgreSQL, SQL Server, MySQL, MariaDB, MongoDB and Delphix. Expect hands-on posts about installation, day-to-day administration, backup and recovery, performance tuning, replication and upgrades.
In the first and second post in this series we did the basic pgpool setup including the watchdog configuration and then did a simple setup for automatically failover from a PostgreSQL master instance in case it goes down for any reason. In addition we told pgpool how an old master instance can be reconfigured as a new standby instance that…
By Franck Pachot . If you have to create a new database now (I’m writing this in March 2017) for a migration of OLTP database with minimal risks of regression, I would recommend: The latest patchset of Oracle Database 12cR1 The latest Proactive Bundle Patch The two patches to get full control over Adaptive statistics This post gives more detail…
In the first post of this little series we did the basic setup of pgpool and configured the watchdog. So, as of now, pgpool uses a VIP which is active on one of the pgpool nodes and failovers to the other node in case the node where the VIP currently runs on goes down for any reason. This provides the…
I wonder how works Dynamic Data Masking (DDM) with these two commands INSERT INTO and SELECT INTO. First, I create a table and add some “sensitive data”: USE [DDM_TEST] GO CREATE TABLE [dbo].[Confidential]( [ID] [int] IDENTITY(1,1) NOT NULL PRIMARY KEY CLUSTERED, [Name] [nvarchar](70)NULL, [CreditCard] [nvarchar](16)NULL, [Salary] [int] NULL, [Email] [nvarchar](60)NULL) insert into [dbo].[Confidential]([Name],[CreditCard],[Salary],[Email]) values (N’Stephane’,N’3546748598467584′,113459,N’[email protected]’) insert into [dbo].[Confidential]([Name],[CreditCard],[Salary],[Email]) values (N’David’,N’3546746598450989′,143576,’[email protected]’)…
By Franck Pachot . A good thing from 12.2 is that the implementation of Unified Audit Trail has changed a little. It was stored in a weird CLI_SWP$ table but now we have a normal partitioned table named AUD$UNIFIED. In a previous post I traced the two purge method: purge all before a timestamp, or purge all. Here is the…
By Franck Pachot . I see lot of databases with two members for redo logs and also two members for standby redo logs. Why not, but when asking I realized that there are some mis-comprehension about it. And what was recommended 10 years ago may be different today. Online and Stanbdy redo logs Your transactions happen on the primary database…
By Franck Pachot . Oracle Database 12.2.0.1 is released for Windows, just 2 weeks after the Linux release, and this is a very good news. Let’s see something new you will encounter in the first screens of Oracle 12.2 installer. Don’t worry, the default choice is the right one. But better understand it. SYSTEM On Linux, you don’t install Oracle…
I have written some posts on how you can make your PostgreSQL deployment high available by using PostgreSQL’s streaming replication feature in the past ( 1, 2 ). The main issue you’ll have to resolve with such a setup is how the application can be made aware of a new master when a fail over happened. You could use EDB…
By William Sescu Yesterday (15th of March), the 10th Switzerland Exadata Community Meeting took place. It was not a meeting only about Exadata, but also about the Oracle Database Appliances which became more and more popular. It is interesting, how many companies in Switzerland already use Exadata’s or ODA’s. A big topic was the Exadata 12.2.1.1.0 software release which includes…
As PostgreSQL is more and more present in our client’s infrastructure, I wanted to describe you the barman installation and configuration. Barman is the backup and recovery tool for PostgreSQL, I configured it using DMK out tool for infrastructure administrators on Oracle, MySQL, and PostgreSQL. I used two virtual severs running under RedHat Enterprise Libux 7.1, one for PostgreSQL database…
Since the new Oracle 12.2.0 version is released, I decided to test the Transparent Data Encryption as new features are available. The following tests have been made in a multitenant environment, DB1 and two pluggable databases DB1PDB1 and DB1PDB2. The first step consists in creating a software keystore. A software keystore is a container that stores the Transparent Data Encryption…
In the last IT Tagen 2016, I presented the Dynamic Data Masking (DDM) and how it worked. To add a little fun, I applied the DDM to a temporal table to see if the history table inherits also from DDM’s rules. In this blog, I explain all the different steps to reproduce my last demo. Step 1: Create the table…
