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Marc Wagner

oracle update-dcscomponents failure during ODA patching to 19.11

By | Oracle | No Comments

You might know that since ODA 19.10, the ODA metadata database is now stored in a MySQL database and not in the apache derby database any more. During a patching to 19.10 or 19.11 from a release earlier than 19.10, the apache derby database will be migrated to a mysql database. This is performed during the odacli update-dcscomponent command. Starting 19.10, DCS Agent will then use MySQL server to display any metadata information, as for…

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Marc Wagner

odabr tool : how to resolve efi device backup failure?

By | Oracle | No Comments

During all my ODA projects where I need to perform patching operation, I’m using odabr tool. This tool is really easy to use and well designed. It offers the possibility to create snapshot on the /, /u01 and /opt LVM file systems as well as a physical copy (rsync) of the files to an external destination storage as NFS. This is powerful in case you would like to get just one file back. The tool,…

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Jérôme Dubar

Manage ODA patching with Data Guard or Dbvisit Standby

By | Database Administration & Monitoring, Database management, Operation systems, Oracle | No Comments

Introduction Building an Oracle infrastructure today without thinking about a Disaster Recovery solution (DR) is quite rare. This became obvious that a backup or a dump will not help if you do not know where to restore or import once your production server is down. And restoring a backup is definitely not the fastest way to bring back your database to life. As a consequence, Data Guard or Dbvisit Standby, depending on which edition you’re…

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Casimir Schmid

When to secure erase storage devices? How to do it on Oracle Database Appliances?

By | Hardware & Storage, Operation systems | No Comments

TL;DR If hardware stays inside your data center, it’s ok to secure erase storage devices. If it leaves your data center (decommission, move to another location), it’s best to physically destroy (shredder) it. Storage devices are not only hard drives, solid state drives, but also the ones holding data temporarily like memory modules (RAM) and CPUs (containing caches, register, …). As a consequence, do not sell used storage devices. Main reason to follow this advice…

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Jérôme Dubar

Does it still make sense to deploy a virtualized HA ODA in 2021?

By | Database management, Hardware & Storage, Operation systems, Oracle | No Comments

Introduction Starting from version 19.11 of the Oracle Database Appliance software bundle, OLVM will definitely replace OVM server as virtualization engine. This change has quite a big impact as there will be no more virtualized specific deployment. Bare metal will come as a standard for all ODAs, and creating VMs for applications, or even databases, will be possible on top of that, for sure if you need them. And you can decide later to use…

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Jérôme Dubar

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

By | Database Administration & Monitoring, Database management, Hardware & Storage, Operation systems, Oracle | No Comments

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 – it ended at the end of 2020) some ODA features will not work with 11gR2 (odacli Data Guard feature for example) the use of ACFS filesystems is mandatory As I already told you, it’s more…

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Jérôme Dubar

Oracle Database Appliance: ODA patch 19.10 is out

By | Database Administration & Monitoring, Database management, Hardware & Storage, Operation systems, Oracle | No Comments

Introduction 4 months after the 19.9, here comes the 19.10 version of the Oracle Database Appliance patch. Let’s have a look at what’s new. Will my ODA supports this 19.10 patch? The 19.10 release will be the same for all ODAs, as usual. The oldest ODA compatible with this release is the X5-2. Don’t expect to install this version on older models. X4-2 is stuck to 18.8, X3-2 is stuck to 18.5 and V1 is…

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Jérôme Dubar

How to configure additional listeners on ODA

By | Database Administration & Monitoring, Database management, Hardware & Storage, Oracle | No Comments

Introduction Oracle Database Appliance has quite a lot of nice features, but when looking into the documentation, at least one thing is missing. How to configure multiple listeners? Odacli apparently doesn’t know what’s a listener. Let’s find out how to add new ones. odacli Everything should be done using odacli on ODA, but unfortunately odacli has no commands for configuring listeners: odacli -h | grep listener nothing! The wrong way to configure a listener One…

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Jérôme Dubar

Oracle Database Appliance: what have you missed since X3/X4/X5?

By | Database Administration & Monitoring, Database management, Hardware & Storage, Oracle | No Comments

Introduction ODA started to become popular with X3-2 and X4-2 in 2013/2014. These 2 ODAs were very similar. The X5-2 from 2015 was different with 3.5 inches disks instead of 2.5 inches and additional SSDs for small databases (FLASH diskgroup). All these 3 ODAs were running 11gR2 and 12cR1 databases and were managed by the oakcli binary. If you’re still using these old machines, you should know that there is a lot of differences compared…

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