We not have the agenda online for the UKOUG 2-stream London SIG, due to take place on 23rd February. There will be an RDBMS Stream and a RAC, Cloud, Infrastructure and Availability Stream.
Mark Rittman will be giving us a keynote talk, with an emphasis on kettles or eating dinner in the dark or the Hadoop cluster in his garage something.
There are some really cool other speakers too, from Oracle, Leading Consultancies and the (more...)
In my previous 2 blogposts i explained how to setup a Vagrantfile that deploys 2 virtualbox machines that can be used as a basis for a RAC cluster and how you could use Ansible to deploy RAC on those VM’s. In this post i want to dive a bit deeper into how i setup Ansible and why, keep in mind that this just one way of doing this.
The Github repository containing all the files (more...)
I have just realised that the number of posts about RAC 12c Release 1 on this blog is rather too small. And since I’m a great fan of RAC this has to change :) In this mini-series I am going to share my notes about creating a Data Guard setup on my 2 node 184.108.40.206.161018 RAC primary + identical 2 node RAC standby system in the lab.
NOTE: As always, (more...)
The time has come for me to plan the upcoming 2017 UKOUG Special Interest Groups.
I am chairman of the RAC, Cloud, Infrastructure and Availability (RAC-CIA) SIG and I’m after presentations for the 3 joint SIGs we will be putting on with the RDBMS SIG, plus the stand-alone SIG will we will having in the autumn.
A SIG is a single day one-or-two stream conference which we take around the UK to make it (more...)
Recently I finished a Grid Upgrade from 220.127.116.11 to 18.104.22.168 + PSU JUL 2016. So far so good during a check I saw that the old tfactl tool under Software Release 22.214.171.124 where up and running.
That could not be okay. So I start an Uninstall and Setup for Release 126.96.36.199.
What steps has to be done?
Check the actual tfactl installation
Tag drei auf der OpenWorld. Man hat das Gefühl, es werden von Tag zu Tag mehr Teilnehmer.
Der erste Vortrag kommt von Markus (Michalewicz). Er präsentiert die neuen Features von RAC 12.2. So wie man Ihn kennt sehr detailliert, daher spare ich mir tiefe Details, denn er kommt im November zur DOAG Konferenz 2016.
Hier ein paar Topics:
- Better Scaleout
- Singleton Services
- more Availability mit dem Health Framework
- new Node Eviction „Mode“
- News im (more...)
So this customer has an Exadata quarter rack and they have an IB listener configured on both DB nodes (for DB connections from a multi-racked Exalogic system). We were adding a new DB node to this rack. So just followed the standard procedure of creating users, directories etc on the new node, setting up ssh equivalence and running addNode.sh. All went fine but root.sh failed. Little looking into the logs revealed that it (more...)
I was doing another GI 188.8.131.52 cluster installation last month when I got really weird error.
While root.sh was running on the first node I got the following error:
2016/07/01 15:02:10 CLSRSC-343: Successfully started Oracle Clusterware stack
2016/07/01 15:02:23 CLSRSC-180: An error occurred while executing the command '/ocw/grid/bin/oifcfg setif -global eth0/10.118.144.0:public eth1/10.118.255.0:cluster_interconnect' (error code 1)
2016/07/01 15:02:24 CLSRSC-287: FirstNode configuration failed
Died at /ocw/grid/crs/install/crsinstall.pm (more...)
I ran in to a small issue while applying the July 2016 quarterly patch to a couple of Exadata racks last week. The systems were running GI 184.108.40.206, previously with the January 2016 PSU. The patches applied successfully, and we were beginning the process of running the post-patch scripts on the databases in the cluster. This process involves manually starting the database in upgrade mode, and we saw a message in SQL*Plus that the (more...)
To build Oracle Clusterware Database at Home, I believe , RAC ATTACK is the best place to learn. Its is a free curriculum and platform for hands-on learning labs related to Oracle RAC. While reviewing the article, I thought to perform 12cR1 RAC installation on OEL 7.2.
Attached is the document :- 12c_RAC_on_OEL7
The attached article is inspired by
RAC ATTACK :- https://en.wikibooks.org/wiki/RAC_Attack_-_Oracle_Cluster_Database_at_Home/RAC_Attack_12c
Tim Hall’s article :- https://oracle-base.com/articles/12c/oracle-db-12cr1-rac-installation-on-oracle-linux-7-using-virtualbox
Deploying Oracle RAC (more...)
By default on an Oracle RAC installation, the listeners are configured to allow any database to register with them. There is no security out of the box to determine which databases may register. While this makes it easy to create new databases without worrying about listener registration, this can cause potential problems in a real environment.
This can be dangerous working with RAC environments where the database registers with both a local and remote listener. The (more...)
Some time ago, I received a free review copy of Brian Peasland‘s recent book, Oracle RAC Performance Tuning.
First, a note on my RAC background: I spent 7 years on Oracle’s RAC Support team. When customers had an intractable RAC performance issue, I was on the other end of the “HELP!” line until it was resolved.
I made Brian’s acquaintance through the MOS RAC Support forum, where Brian stood out as a frequent (more...)
If you’ve run an exachk report, y0u may have seen the following message with regard to your databases:
||Database parameter CLUSTER_INTERCONNECTS is NOT set to the recommended value
This check is commonly seen when a database is created on Exadata without using the custom “Exadata” templates included with the database creation assistant. These customized templates include a multitude of recommended parameter settings found in (more...)
I have recently configured Active/Passive Failover cluster using Grid Infrastructure 12cR1 and wrote document on that subject. Now I plan to use this environment and convert "test12" database from Single-Instance to RAC database.
There are several ways to convert non-RAC database to RAC database:
- using Database Configuration Assistant (DBCA)
- Oracle Enterprise Manager
- rconfig command line utility
In this post I will describe how to perform conversion using rconfig utility
I noticed something for the first time tonight when I was playing around in the Enkitec lab – something that I have been doing wrong for a while. When working in the lab, I often rely on the crsctl command to shut down the entire cluster stack for me. It’s really easy to use “crsctl stop cluster -all” followed by “dcli -l root -g ~/dbs_group /u01/app/220.127.116.11/grid/bin/crsctl stop crs” to get everything down (more...)
Removing a service via srvctl has not historically resulted in the service being fully removed from the database and it would still be visible in DBA_SERVICES as show below in an 18.104.22.168 database:
Create the service:
$ srvctl add service -d orcl -s demo -r "ORCL1,ORCL2"
During my project work I had to tune the SOA dehydration store on more than one occasion. Through this posting I would like to share the tuning tips collected during these exercises. It is not a step-by-step guide, because with tuning there never is a 'one-size-fits-all' in my humble opinion, but I provide in general a guidance that you can use as a reference for your own situation. I will also refer to related Oracle (more...)
Original Post can be viewed at MGMTDB: Grid Infrastructure Management Repository
MGMTDB is new database instance which is used for storing Cluster Health Monitor (CHM) data. In 11g this was being stored in berkley database but starting Oracle database 12c it is configured as Oracle Database Instance. In 11g, .bdb files (more...)