Tuesday, May 12, 2020

The debate about Single Purpose Database VS Converged/Consolidated Databases: Which approach/architecture is better?

The debate about Single Purpose Database VS Converged/Consolidated Databases: Which approach/architecture is better?

Here is an excellent blog post by Maria Colgan Master Product Manager at Oracle Product Management summarizing the pros and cons of each approach. Here is a quick recap on this topic.
  • Single-Purpose Databases / Purpose Built Databases
  • Single-Purpose Databases or Purpose Built Databases are architected for a singular or small number of problems/workloads: they are rather simplistic in nature with lesser functionality.
  • It is relatively easier to start development against Single-Purpose Databases because of their simplicity.
  • Single-Purpose Databases mostly scale well because they do not offer strong consistency guarantees.
  • Single-Purpose Databases end up costing significantly more in the medium to long run due to data fragmentation and higher maintenance costs.
  • Single-Purpose Best-of-Breed Databases typically creates Vendor Lock-In.
  • Single-Purpose Databases are generally used in boutique cases which, typically require higher performance requirements e.g. transaction processing systems.
  • Converged/Consolidated Databases 
  • Converged/Consolidated Databases cater to all types of data, workloads and development protocols.
  • Eliminating data fragmentation also eliminates data contagion in Converged/Consolidated Databases enabling application logic/modules to use and reuse a shared data copy across the organization.
  • Converged/Consolidated Databases enable more synergy for data and workloads making development faster.
  • Converged/Consolidated Databases make it much simpler for developers to run stuff like Cloud, Autonomous/ML, extended SQL, spatial, blockchain, IoT etc. in one singular consolidated database rather than running them across distributed Single-Purpose databases.
  • Converged/Consolidated Databases helps the overall ecosystem to be relatively lesser complex which results in lesser maintenance and development costs in the medium to long run.
  • Summary
  • The of Single-Purpose Databases or Purpose Built Databases should be well thought out for a very limited/focused set of problems/tasks as, they come at extra maintenance/cost in the medium to long run.

This video by Juan Loaiza & Andrew Sutherland gives a good summary on this debate.


I hope you got a quick overview of the pros and cons of this ongoing debate: Single Purpose Database VS Converged/Consolidated Databases: Which approach/architecture is better?

Cheers.

Monday, May 11, 2020

Oracle Database 19c is now certified on Linux 8

Oracle Database 19c is now certified on Linux 8 - there is a very good blog post by Mike Dietrich Master Product Manager for Oracle Database Upgrade and Migrations.

Here is a quick recap on this topic.
  • Minimum Release Update is 19.7 (Or 19.6 with patches or higher.
  • Goto My Oracle Support > Certifications tab and then enter  “Oracle Database“, “19.0.0.0.0” and either “Linux x86-64 Oracle Linux 8.x” or “Linux x86-64 Red Hat Enterprise Linux 8“.
  • Reference Document: MOS Note: 1369107.1
  • Minimum Kernel Versions: 
    • Oracle Linux 8.1 with the Unbreakable Enterprise Kernel 6: 5.4.17-2011.0.7.el8uek.x86_64 or later
    • Oracle Linux 8.0 with the Red Hat Compatible kernel: 4.18.0-80.el8.x86_64 or later
Oracle Database 19c is certified on OL8 and RHEL8

Oracle Database 19c is certified on OL8 and RHEL8


Enjoy Oracle 19c on Linux 8.
Cheers.

Sunday, May 10, 2020

Oracle Standard Edition High Availability Released - A Quick Summary of New Features

Oracle released a High Availability version of Oracle Standard Edition (SE2) recently.

There is a very good blog post by Markus Michalewicz Senior Director Oracle Product Management summarizing the following new features. Here is a quick recap of what's new with SE2.
  • With SE2 Cluster-based failover using Oracle Clusterware is now available for single-instance Standard Edition Oracle Databases. 
  • With this latest release of Oracle Standard Edition, you can now use standard Oracle Clustering features such as Automatic Storage Management (ASM), ASM Cluster File System (ACFS) & Oracle Clusterware on Oracle Standard Edition.
  • Oracle Standard Edition is completed integrated with 19c RU 19.7.
  • However, Oracle Standard Edition High Availability DBs are NOT RAC enabled - to RAC enable your Oracle databases, you still do need Real Application Clusters (RAC) option enabled.
  • There is no direct upgrade path for a single instance or a pre-19c RAC Standard Edition 2 Database
  • The Standard Edition High Availability option can be failed over to an unlicensed machine for up to 10 days.
  • SE2 is available on Windows, Linux & Solaris family of Operating Systems.
Enjoy the SE2 version of Oracle.

Cheers.