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Category Archives: Hardware & Storage

David Hueber

ODA 12.2.1.2.0: Some curious password management rules

By | Database Administration & Monitoring, Hardware & Storage | One Comment

While deploying an ODA based on the DCS stack (odacli), it is mandatory to provide a “master” password at appliance creation. The web GUI provides for that a small tooltip which describes the rules applied on password management. However it looks like there is some flexibility with those rules. Lets try to check this out with some basics tests.  

 
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Nicolas Penot

Migrate Oracle Database(s) and ASM diskgroups from VMWARE to Oracle VM

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

This is a step by step demonstration on how to migrate any ASM disk groups from a cluster to another. May be use, with or without virtualization and may be used with storage layer snapshot for fast environment provisioning. Step 01 – Shutdown source database(s) on VMWARE servers Shutdown all databases hosted in the targeted Disk groups for which you want consistency. Then unmount the disk groups. $ORACLE_HOME/bin/srvctl stop database -db cdb001 $ORACLE_HOME/bin/asmcmd umount FRA…

 
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David Hueber

ODA X7-2S/M 12.2.1.2.0: update-repository fails after re-image

By | Database Administration & Monitoring, Hardware & Storage | 5 Comments

While playing with a brand new ODA X7-2M, I faced a strange behaviour after re-imaging the ODA with the latest version 12.2.1.2.0. Basically after re-imaging and doing the configure-firstnet the next step is to import the GI clone in the repository before creating the appliance. Unfortunately this command fails with an error DCS-10001:Internal error encountered: Fail to start hand shake to localhost:7070. Why not having a look on how to fix it…  

 
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Nicolas Penot

Automate OVM deployment for a production ready Oracle RAC 12.2 architecture – (part 02)

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

In this post we are going to deploy a R.A.C system ready to run production load with near-zero knowledge with R.A.C, Oracle cluster nor Oracle database. We are going to use the “Deploy Cluster Tool” which is provide by Oracle to perform Oracle deployment of many kind of database architectures you may need like Oracle single instance, Oracle Restart or Oracle R.A.C. This tool permits you to choose if you want an Enterprise Edition or…

 
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Nicolas Penot

Automate OVM deployment for a production ready Oracle RAC 12.2 architecture – (part 01)

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

After having worked with OVM on various architectures I can say that it is a good technology to easily build virtualized environments for production applications. Because it is based on XEN and has simple ways to deal with existing storage (FC, ISCSI, NFS, …) and networking solution (bond, lacp, …) it is a robust and convenient way to virtualized IT infrastructures keeping “bare-metal” performance. Besides, it is an hard partitioning technology which is compliant with…

 
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Clemens Bleile

Recommended DB Parameters on the Oracle Database Appliance (ODA)

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

When creating a DB on the ODA using # oakcli create database -db <db-name> a template is used to set a couple of DB parameters like e.g. _datafile_write_errors_crash_instance=FALSE _db_writer_coalesce_area_size=16777216 _disable_interface_checking=TRUE _ENABLE_NUMA_SUPPORT=FALSE _FILE_SIZE_INCREASE_INCREMENT=2143289344 _gc_policy_time=0 _gc_undo_affinity=FALSE db_block_checking=’FULL’ db_block_checksum=’FULL’ db_lost_write_protect=’TYPICAL’ filesystemio_options=’setall’ parallel_adaptive_multi_user=FALSE parallel_execution_message_size=16384 parallel_threads_per_cpu=2 use_large_pages=’ONLY’ In recent projects I saw a couple of DBs running on ODA, which did not have (all) those parameters set, because the DBs were migrated from a non-ODA-platform and the customer took over…

 
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David Hueber

ODA – 32GB template but got a database with 16GB SGA???

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

I got an interesting question today from a customer which created a database on ODA. He selected the template odb-04 which shows 32GB Memory but got a database with a 16GB SGA… Is it due to the PGA size, a limitation in the system, the huge pages usage which is reached or even a bug?  

 
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Nathan Courtine

Manage Azure in PowerShell (RM)

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

Azure offers two deployment models for cloud components: Resource Manager (RM) and Classic deployment model. Newer and more easier to manage, Microsoft recommends to use the Resource Manager. Even if these two models can exist at the same time in Azure, they are different and managed differently: in PowerShell cmdlets are specific to RM. In order to be able to communicate with Azure from On-Premises in PowerShell, you need to download and install the Azure…

 
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