Extending an Exadata Eighth Rack to a Quarter Rack

In the past year I’ve done a lot of Exadata deployments and probably half of them were eighth racks. It’s one of those temporary things – let’s do it now but we’ll change it later. It’s the same with the upgrades – I’ve never seen anyone doing an upgrade from an eighth rack to a quarter. However, a month ago one of our customers asked me to upgrade their three X5-2 HC 4TB units from (more...)

How to resolve missing dependency on exadata-sun-computenode-minimum

I’ve been really busy last few months – except spending a lot of time on M25 I’ve been doing a lot of Exadata installations and consolidations. I haven’t posted for some time now but the good news is that I got many drafts and presentations ideas.

This is a quick post about an issue I had recently. I had to integrate AD authentication over Kerberos on the compute nodes (blog post to follow) but had (more...)

SCAN Listener Crash After Applying July 2016 PSU

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 12.1.0.2, 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...)

Redirecting ILOM Console Via SSH Tunneling With Putty

While preparing for a virtualized Exalytics upgrade, I was testing the various connection methods that would be needed.  Last on the list was to validate that I could connect to the ILOM’s web interface, launch the java console, and mount an ISO file from my laptop to the machine.   This is necessary because the Oracle VM server upgrade for a virtualized Exalytics requires you to boot from a specific ISO file in order to patch (more...)

Notes on vendor lock-in

Vendor lock-in is an important subject. Everybody knows that. But few of us realize just how complicated the subject is, nor how riddled it is with paradoxes. Truth be told, I wasn’t fully aware either. But when I set out to write this post, I found that it just kept growing longer.

1. The most basic form of lock-in is:

  • You do application development for a target set of platform technologies.
  • Your applications can’t run (more...)

How To Configure Exadata Database Machine in Enterprise Manager Cloud Control 13c (OEM13c)

I have followed the steps in Oracle Documentation link: https://docs.oracle.com/cd/E63000_01/EMXIG/ch2_deployment.htm#EMXIG215 to configure Exadata Database Machine in OEM13c. If you want to configure your Exadata in OEM13c you have to follow the above mentioned link. In this post I will share the mandatory steps for configuration, and some of the issues which I faced while configuring the Exadata…

Is Your Data Center Ready For Exadata Machines!!

Before opting to procure Exadata machines, the first thing you need to check is the readiness of your data center to hold these machines. Exadata's dimensions are similar to other normal racks i.e a 42U rack. The complete details for X5-2 physical site requirements can be found HERE. This is very important step as, for some data…

Exadata X6-2 Launched

5th April 2016, Oracle announced arrival of Exadata X6-2. Overview of all its capabilities can be found HERE. Check DataSheet for list of hardware components and capacity of each X6-2 rack. Sometimes, Oracle changes hardware specifications for its racks e.g X5-2 was released with 4TB HDD initially, but after few months the datasheet was modified and…

Planning Database Hardware Upgrade !!! Consider Oracle Exadata

Upgrading database hardware in an organization is always a cumbersome process. The most time consuming step is, planing for the upgrade, which mainly includes choosing right hardware for your Oracle databases. After deciding on the hardware type for your databases, rest will be taken care by technical teams involved. I will be discussing, how I…

Oracle Exadata X6 released

Oracle has just announced the next generation of Exadata Database Machine – X6-2 and X6-8.

Here are the changes for Exadata X6-2:
1) X6-2 Database Server: As always the hardware has been updated and the 2-socket database servers are now equip with latest twenty two-core Intel Xeon E5-2699 v4 “Broadwell” processors in comparison to X5 where we had eighteen-core Intel Xeon E5-2699 v3 processors. The memory is still DDR4 and the default configuration comes with (more...)

Collaborate 16: My sessions

I’ll be at Collaborate 16 next month and looking forward to seeing lots of good friends, learning some new things, and sharing a little experience too. For the last of those, I’ll present 3 sessions, er, more like 2.2 sessions:

  • Wed, 13-Apr, 12:45-12:55pm: Oak Table World 10-minute Lightning talk “Tools used for security and compliance on Linux”
  • Wed, 13-Apr, 3-4pm: Oak Table World session “IPv6: What You Need to Know (with Linux & Exadata references)”
  • (more...)

Exadata onecommand fails at cell disk creation

I was installing another Exadata last month when I got an error on create cell disks step. I’ve seen the same error before when I was extending two to three rack Exadata configuration but thought it was one-off.

The cell disk creation failed as below:

[root@exa01db01 linux-x64]# ./install.sh -cf Customer-exa01.xml -s 8

 Initializing
 Executing Create Cell Disks
 Checking physical disks for errors before creating celldisks.........................
 Restarting cell services....................................................
 ERROR:

 Stopping the RS, CELLSRV,  (more...)

Oracle as the new IBM — has a long decline started?

When I find myself making the same observation fairly frequently, that’s a good impetus to write a post based on it. And so this post is based on the thought that there are many analogies between:

  • Oracle and the Oracle DBMS.
  • IBM and the IBM mainframe.

And when you look at things that way, Oracle seems to be swimming against the tide.

Drilling down, there are basically three things that can seriously threaten Oracle’s market (more...)

Backup to ZFS Storage Appliance Best Practices for Exadata Database Machine

I made a presentation called "Best Practices for Exadata Maximum Availability" at BGOUG autumn event last week. In addition to general Exadata best practices about backup&recovery, disaster recovery, RAC&ASM, corruption detection features; i reserved half of my time to speak about integration of Exadata and ZFS storage appliance for the best performance of database backup&recovery. This topic

How to rename ASM disk groups in Exadata

Deployment of Exadata requires you to generate configuration using Oracle Exadata Deployment Assistant (OEDA). Within the same the default  ASM disk groups names are DBFS_DG, RECOC1 and DATAC1. I usually change those to RECO01 and DATA01 as others doesn’t make sense to me and the only place where I find the default ones is on Exadata.

I had an incident last year where the Exadata deployed half way through and names were left by default (more...)

Oracle SPARC M7 Processor Breaks the “Sacrifice Performance for Security” Rule and Much More

Oracle Executive Vice President John Fowler used the occasion of Open World 2015 to introduce Oracle's SPARC M7 processor, the fastest in the world. Learn more ...

The post Oracle SPARC M7 Processor Breaks the “Sacrifice Performance for Security” Rule and Much More appeared first on VitalSoftTech.

How to move OEM12c management agent to new location

While working on another Exadata project recently I found that OEM12c agents on the compute nodes were installed on different locations on each of the three Exadatas. On one of them was under /home/oracle/agent, another one had them under /opt/oracle/agent and third one had them under /oracle/agent. Obviously this was not the standard and the agents had to be moved under /u01/app/oracle/agent. The only problem with that was that the three Exadatas were already discovered (more...)

Couchbase 4.0 and related subjects

I last wrote about Couchbase in November, 2012, around the time of Couchbase 2.0. One of the many new features I mentioned then was secondary indexing. Ravi Mayuram just checked in to tell me about Couchbase 4.0. One of the important new features he mentioned was what I think he said was Couchbase’s “first version” of secondary indexing. Obviously, I’m confused.

Now that you’re duly warned, let me remind you of aspects of (more...)

OOW 2015: my presentation

I don’t have an official OOW presentation in the conference this year. However, I am presenting a session at the Oak Table World 2015 event behind held concurrently with OOW 2015. My topic is “Exadata Database Machine Security” and I plan to review some of the newest updates to security for the Exadata Database Machine engineered system.

As the website indicates, the event is completely free and there is no pre-registration or enrollment required–just show (more...)

Exadata X5 PDU – CLI already in use

Exadata X5-2 and X4-8B racks are delivered with the “Enhanced” PDU metering units connected via the Cisco switch. Although the documentation says they should have static addresses, they don’t. You need to configure them manually using serial console connection, this is described in my earlier post here.

However if you forget to exit the serial console connection to the PDU and then try to login using SSH later you’ll get the following message:

login as:  (more...)