While deploying an X5 Full Rack recently it happened that the Grid Infrastructure Management Repository was not created by onecommand. The GIMR database was optional in 18.104.22.168 and became mandatory in 22.214.171.124 and should be automatically installed with Oracle Grid Infrastructure 12c release 1 (126.96.36.199). For unknown reason to me that didn’t happen and I had to create it manually. I’ve checked all the log files (more...)
I’ve done several Exadata deployments in the past two months and had to upgrade the Exadata storage software on half of them. Reason for that was because units shipped before May had their Exadata storage software version of 188.8.131.52.0.
The upgrade process of the database nodes ran fine but when I ran dbnodeupdate.sh -c for completing post upgrade steps I got an error that the system wasn’t on the expected (more...)
This is just a quick post to highlight a problem I had recently on another Exadata deployment.
For the most customers the management network on Exadata is routable and the DNS servers are accessible. However in a recent deployment for a financial organization this wasn’t the case and the storage servers were NOT able to reach the DNS servers. The customer provided a different set of DNS servers within the management network which were still (more...)
I’ve done several Exadata deployments recently and I have to say of all the components PDUs were hardest to configure. Important to notice that unlike earlier generations of Exadata the PDUs in X5 are Ehnanced PDUs and not Standard.
Reading the public documentation (Configuring the Power Distribution Units) it says that on PDUs with three power input leads you need to connect the middle power lead to the power source. Well I’ve done (more...)
I was recently upgrading an Exadata 184.108.40.206 DBBP6 to DBBP7 and as usual I went for the latest opatch version which was 220.127.116.11.7 (Apr 2015) as of that time.
After running the opatchauto apply or opatchauto apply -analyze I got the following error:
System Configuration Collection failed: oracle.osysmodel.driver.sdk.productdriver.ProductDriverException: java.lang.NullPointerException Exception in thread "main" java.lang.RuntimeException: java.io.IOException: Stream closed (more...)
I’m pleased to say that I will be speaking at the UKOUG Systems Event 2015, held at Cavendish Conference Center in London, 20 May 2015. My session “Oracle Exadata Meets Elastic Configurations” starts at 10:15 in Portland Suite. Here is the agenda of the UKOUG Systems Event.
In a month time I’ll be also speaking at the Spring Conference of the Bulgarian Oracle User Group. The conference will be held from 12th to 14 (more...)
With the release of Exadata X5 Oracle introduced elastic configurations and changed the process on how the initial configuration is performed. Back before you had to run applyconfig.sh which would go across the nodes and change all the settings according to your config. This script has now evolved and it’s called applyElasticConfig.sh which is part of OEDA (onecommand). During one of the recent deployments I ran into the below problem:
[root@node8 linux-x64]# ./applyElasticConfig. (more...)
During a recent X5 installation I had to configure Link Aggregation Control Protocol (LACP) on the client network of the compute nodes. Although the ports were running at 10Gbits and default configuration of Active/Passive works perfectly fine the customer wanted even distribution of traffic and workload across their core switches.
Link Aggregation Control Protocol (LACP), also known as 802.3ad is a methods of combining multiple physical network connections into one logical connection to increase (more...)
It’s been a while since my last post but I was really busy working on a number of projects.
The purpose of this post is to highlight an issue I had while building a standby database. The environment we had – three 18.104.22.168 databases at host A (primary) and same were restored from backup on another host B (standby), both hosts were running Linux. It’s important to mention that both hosts were (more...)
I’m working on Oracle database migration project where customer have chosen commodity x86 hardware with RHEL6 and EMC storage.
I’ve done many similar installations in the past and I always used the native MPIO in Linux (DM-Multipath) to load balance and failover I/O paths. This time however I’ve got EMC PowerPath doing the load balance and failover and got the native MPIO disabled. From my point of view it’s the same, whether I’ll be using (more...)
Just a short post on a problem I encountered recently.
I had to install 11.2 GI and right after running the installer I got a message saying permission denied. Below is the exact error:
[oracle@testdb grid]$ ./runInstaller -silent -showProgress -waitforcompletion -responseFile /u01/software/grid/response/grid_install_20140114.rsp Starting Oracle Universal Installer... Checking Temp space: must be greater than 120 MB. Actual 7507 MB Passed Checking swap space: must be greater than 150 MB. Actual 8191 MB (more...)
Happy New Year!
So many things happened in the past six months, I really can’t tell how quickly the time passed. As people say the life is what happens to you while you are making plans for the future.
I wish I had the time to blog more in the past year and I plan to change this in the New Year!
2014 was really successful for me. I worked on some really interesting projects, (more...)
I’m more than happy that I will be speaking at this year’s Oracle Open World. The first and only time I attended was back in 2010 and now I’m not only attending but speaking as well!
Both with Jason Arneil will talk about what we’ve learned on our Exadata implementations with two of the biggest UK retailers so please join us:
Session ID: CON2224
Session Title: Oracle Exadata Migrations: Lessons Learned from Retail
Venue / (more...)
I’ll be speaking at the spring conference of the BGOUG held between 13th and 15th of June. I was a regular attendee of the conference for eight years in a row but since I moved to UK I had to skip the last two conferences. My session is about Oracle GoldenGate – it will cover the basics, components, usage scenarios, installation and configuration, trail files and GG records and many more.
See you there in (more...)
The following blog post continue the EMDIAG repvfy kit series and will focus on how to troubleshoot and solve the problems reported by the kit.
The repository verification kit reports number of problems with our repository which we are about to troubleshoot and solve one by one. It’s important to notice that some of the problem are related so solving one problem could also solve another one.
Here is the output I’ve got for my (more...)
On Exadata the local drives on the compute nodes are not big enough to allow larger exports and often dbfs is configured. In my case I had a 1.2 TB dbfs file system mounted under /dbfs_direct/.
While I was doing some exports yesterday I found that my dbfs wasn’t mounted, running quick crsctl command to bring it online failed:
[oracle@exadb01 ~]$ crsctl start resource dbfs_mount -n exadb01 CRS-2672: Attempting to start 'dbfs_mount' on 'exadb01' (more...)
Just a quick post regarding OEM 12c installation where recently I had to install OEM 12c and during the repository configuration step the installation fails with error:
ORA-12801: error signaled in parallel query server P151
This was caused by a known bug which requires decreasing the number of parallel queries of the repository databases and start over the installation. The database had cpu_count set to 64 and parallel_max_servers to 270. After setting the parallel_max_servers to (more...)
Not long time ago customer asked me to create new a database and refresh it from production. Nothing special here database was quickly created and then refreshed using network import for few schemas. Few weeks later I’ve been told that the database has a timestamp problem. The date and time were correct but the time zone was different from the production:
SQL> SQL> SELECT DBTIMEZONE FROM DUAL; DBTIMEZONE ------ +01:00
Looking back I tried to (more...)
I was recently configuring backup on the customers Exadata with IBM TSM Data Protection for Oracle and run into weird RMAN error. The configuration was Oracle Database 11.2, TSM client version 6.1 and TSM Server version 5.5 and this was the error:
[oracle@oraexa01 ~]$ rman target / Recovery Manager: Release 22.214.171.124.0 - Production on Wed Jan 29 16:41:54 2014 Copyright (c) 1982, 2011, Oracle and/or its affiliates. (more...)
I had quite an interesting case recently where I had to build stretch cluster for a customer using Oracle GI 12.1 and placing quorum voting disk on NFS. There is a document at OTN regarding the stretch clusters and using NFS as a third location for voting disk but it has information for 11.2 only as of the moment. Assuming there is no difference in the NFS parameters I used the Linux parameters (more...)