The world's largest Raspberry Pi Cluster by Oracle

The world's largest Raspberry Pi Cluster was completed and built by Oracle. Here is an excellent blog post by Gerald Venzi Product Manager for Oracle Database.

Quick Recap on this topic:

• The world's largest Raspberry Pi Cluster by Oracle
• 5 x 2 Meter high racks
• 1 Supermicro 1U Xeon server
• 18 USB power supplies
• 22 network switches
• 49 customer 3D printed Raspberry Pi holders
• 1,060 Raspberry Pies
• Showcased at Oracle Code One 2019

Cheer.

How to upgrade to Oracle Real Application Clusters (RAC) 19c with ZERO DOWNTIME?

Here is a very useful blog post by Anil Nair Oracle Senior Principal Product Manager on How to upgrade to Oracle Real Application Clusters (RAC) 19c with ZERO DOWNTIME?

Here is a quick recap on this topic:

• Upgrade to RAC 19c requires Linux 7.
• Running ./gridSetup on OS version < Linux 7 will result in an error.
• Performing a series of Delete Node, Upgrade & Add Node Operations = Upgrade OS & Grid Infrastructure (GI) at the same time without Downtime (Pretty Cool Stuff).
• Alternative Upgrade Paths.

The entire presentation by Anil can be found here.

Cheers.

Oracle Real Application Clusters (RAC) 19c Upgrade Paths, Best Practices, Tips & Tricks

Today's post is a shout out to a very beneficial presentation by Anil Nair Oracle Senior Principal Product Manager on Oracle Real Application Clusters (RAC) 19c Upgrade Paths, Best Practices, Tips & Tricks.

Here is a brief summary of the presentation by Anil:

• Lifetime Support Policy Schedule.
• Oracle 12.2 Release Family & 19c.
• Future Projections for Upgrades.
• Oracle 19c requires Linux 7.
• How to upgrade to Linux 7 with least downtime.
• Alternative Paths to OS Upgrades.
• Latest ORAChk = ORAChk + CLUVFY + Autoupgrade.jar + Application Continuity & Security Related Checks.
• orachk -preupgrade = One Command for all Autoupgrade Checks.
• State of Grid Infrastructure Management Repository (GIMR).
• gridSetup can now be used with -dryRunForUpgrade option.
• Real Only Oracle Home (ROOH).
• Faster Patching with -SwitchHome.
• Upgrade Best Practices Summary.
• Whats New for Oracle 19c Grid Infrastructure (GI)?
• New GI Resource Modeling for PDBs (New).
• Oracle Clusterware Start Diagnostics (New).
• Auto-Diagnosis of unsuccessful startup issues (New).
• New Clusterware Monitor Thread & Processes (New).
• Private Network Interface Check (New).
• Oracle Clusterware Ciphers (New).
• Human Readable Messages in Trace Files for faster issue resolution (New).
• Whats New with Oracle Cache Fusion?
• Optimized Resource Master Placement (New).
• Zero Downtime for Planned Outages (New).
• Smart DRM (New).
• Rolling Windows to reduce reconfiguration impact (New).
• RAC Performance Automation.
• Exadata RAC Optimizations.
• Cache Fusion Optimizations on Exadata.

To summarize, upgrading to Oracle RAC 19c comes with lots of improvements, automations and optimizations to make the DBA's life easier than before. Check out Anil's presentation here.

Enjoy the new features by upgrading to Oracle RAC 19c.

Cheers.

Under the hood of Oracle RAC Scalability & High Availability - A Primer

Here is a very useful blog post by Anil Nair Oracle Senior Principal Product Manager outlining Oracle RAC Scalability & High Availability Internals.

Here is a quick recap on this topic:

• Fault Detection & Automatic Diagnosability with Oracle RAC 19c.
• Oracle Database High Availability Features Recap.
• Oracle Cluster Synchronization Services Recap.
• Oracle Clusterware CSSD Monitor & Agent Recap.
• Achieving Higher Availability with Flex ASM.
• Autonomous Database = RAC on Exadata (+ More).
• A whole lot more on Oracle RAC Scalability & High Availability.

The entire presentation by Anil can be found here.

Cheers.