Please join me in welcoming the Exadata product documentation to the internet. It’s been a long time coming, but glad it’s finally made an appearance!
Many people have asked me this question that how they can learn Exadata ? It starts sounding even more difficult as a lot of people don’t have access to Exadata environments. So thought about writing a small post on the same.
It actually is not as difficult as it sounds. There are a lot of really good resources available from where you can learn about Exadata architecture and the things that work differently from any non-Exadata (more...)
I’ve spent a few days playing with patching 184.108.40.206 with the so called “Database Patch for Engineered Systems and Database In-Memory”. Lets skip over why these not necessarily related feature sets should be bundled together into effectively a Bundle Patch.
First I was testing going from 220.127.116.11.1 to BP2 or 18.104.22.168.2. Then as soon as I’d done that of course BP3 was released.
I think 2 years is long enough to wait between posts!
Today I delivered a session about Oracle Exadata Database Machine Best Practices and promised to post the slides for it (though no one asked about them :). I’ve also posted them to the Tech14 agenda as well.
Direct download: UKOUG Tech14 Exadata Security slides
However, when I last looked it seemed Oracle had not discussed anything regarding the IB switches being vulnerable.
The IB switches have bash running on them and Oracle have verified the IB switches are indeed vulnerable.
[root@dm01dbadm01 ~]# ssh 10.200.131.22 email@example.com's password: Last login: Tue Sep 30 22:46:41 2014 from dm01dbadm01.e-dba.com (more...)
There has recently been a lot of news about the exploit revealed in the bash shell. While the fix is very quick to implement, there are a couple of tricks that are required to install this update on an Exadata environment. According to Oracle support note #1405320.1, Exadata storage server versions 11.2.3.x.x and 12.1.1.x.x are susceptible to the exploit. On a typical Oracle Enterprise Linux, a simple (more...)
This is based on the presentation Juan Loaiza gave regarding What’s new with Exadata. While a large part of the presentation focussed on what was already available, there are quite a few interesting new features that are coming down the road.
First of was a brief mention of the hardware. I’m less excited about this. The X4 has plenty of the hardware that you could want: CPU, memory and flash. You’d expect some or all (more...)
I’m sharing this in the hope of saving someone from an unwelcome surprise.
I recent upgraded an Exadata system from 22.214.171.124.1 to 126.96.36.199.1. Apart from what turns out to be a known bug that resulted in the patching of the InfiniBand switches “failing”, it all seemed to go without a snag. That’s until I decided to do some node failure testing…
Having forced a node (more...)
There are already a lot of blogposts and presentations done about Hybrid Columnar Compression and i am adding one more blogpost to that list. Recently i was doing some small tests one HCC and noticed that that inserts on a HCC row didn’t got compressed and yes i was using direct path loads:
DBA@TEST1> create table hcc_me (text1 varchar2(4000)) compress for archive high; Table created. KJJ@TEST1> insert /*+ append */ into hcc_me select dbms_random.string('x',100) (more...)
We have migrated a number of our databases from non-Exadata servers to the Exadata Database Machine using the “RMAN 11g Duplicate standby from Active database” method. After creating a Dataguard Database, during a narrow maintenance window, we performed a failover of the database to the one Exadata Database Machines in the cluster. Below are the […]
The post The Step-by-Step Guide to Migrating to an Exadata Database Machine appeared first on VitalSoftTech.
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/188.8.131.52/grid/bin/crsctl stop crs” to get everything down (more...)
Yes that is true, i said it, cellcli can lie to you there are some special cases were the output of cellcli is not the reality and you should double check it’s output with your standard OS tools. So this the output if dcli calling cellcli on an Exadata rack from an client:
[root@dm01db01 ~]# dcli -g cell_group -l root cellcli -e list cell attributes cellsrvStatus,msStatus,rsStatus dm01cel01: running running running dm01cel02: running running running dm01cel03: (more...)
I’ve previously written about a problem I encountered when kdump is configured to write to an NFS location with UEK (in Exadata software version 184.108.40.206.1). I’m please to report that the root cause of the problem has been identified and there is a very simple workaround.
There were some frustrating times working this particular SR, the most notable being a response that was effectively, “It works for me (and so I’ll (more...)
Recently we noticed that imageinfo was displaying the following information at a customers site. Imageinfo was not displaying data i suspected, so a quick little blogpost about what was going on there.
[root@dm01db01 ~]# dcli -g /opt/oracle.SupportTools/onecommand/dbs_group -l root "imageinfo | grep 'Image version'" dm01db01: Image version: 11.2. (more...)