Given the incredible number of comments I received on my last blog post, and the content of those comments, it is very obvious that folks are extremely confused by what I meant by that post, as well as the comments by Mr. Garsthagen (Oracle Director Level Employee), referenced in that post.
The confusion is typified by the following comment, the most recent I have received:
Oracle does not recognize either (Vmware/DRS Affinity) as a hard partition
First, to be completely clear, I have never stated, nor do I believe, that VMware (or any other software hypervisor for that matter) (more...)
As all of my readers know, I have been a strong proponent of VMware virtualization of Oracle Database servers for license cost savings purposes. Predictably, Oracle has pushed back on this issue in the past. Well, they have now thrown in the towel.
In an online video, Richard Garsthagen, Director of Cloud Business Development EMEA for Oracle, has stated publicly that VMware host affinity rules (when combined with vMotion logging) work just fine, (more...)
As many of you have heard by now, Paul Mauritz is out as CEO of VMware, and Pat Gelsinger (formerly COO of EMC, reporting directly to Joe Tucci) is replacing him.
The relevant question for those of us who care passionately about Oracle virtualization using VMware vSphere is:
What does this mean for VMware's BCA (Business Critical Applications: stuff like Oracle) strategy (which under Maritz was somewhat lacking)?
In my view, this is very, very good news indeed. The reason is simple: Paul Maritz was former Microsoft, and thus very Microsoft-centric. Under Maritz, VMware very successfully penetrated the Microsoft (more...)
I thought it worth republishing Dave Welch's (of House of Brick) comments to my discussion on the Everything Oracle at EMC online community on the subject of Oracle licensing costs on VMware vSphere configurations. Here are Dave's comments:
Let me start by bringing all of you into the courtroom. There are three issues that you will observe me as counsel provide to the jury as part of my allowed instruction (I am not an attorney in real life).
I offer the definitions in this paragraph only to make this post as self-sufficient as possible and not with intent (more...)
VMware has put a stake in the ground with respect to Oracle licensing of VMware VMs running Oracle. The gist of this statement regarding certification, support, and licensing is that DRS host affinity rules, combined with vCenter audit trails showing where VMs have actually run, are sufficient for Oracle licensing purposes. The summary of the document states:
DRS Host Affinity rules can be used to run Oracle on a subset of the hosts within a cluster. In many cases, customers can use vSphere to achieve substantial licensing savings.
vCenter VMotion Logging
Concerning vCenter VMotion logging, the (more...)
I have received a fair number of responses to my previous post on this subject (some via comments and some via email). I thought the discussion worthwhile enough to punch it up a bit more here.
As I pointed out in the previous post, EMC can easily match NetApp's play to back up ExaData with the following:
As Geoff Rosser so correctly pointed out, this answer is incomplete. Yes, Data Domain is an awesome Oracle backup solution. Yes, it provides incredible deduplication rates for Oracle database environments. (Thanks, dynamox.) However, it is not the only viable solution from (more...)
There has been lots of material on the web recently concerning NetApp being able to backup ExaData. The purpose of this blog is to respond to that content, and state why NetApp's offering is rather lame, and actually offers nothing new.
The items on the web produced by NetApp are easy to find. I will not increase their Google hit rate by linking to them here. Suffice it to say, Neil Gerren's blog contains the principle content to which I will respond here. There is also NetApp technical report TR 4022, a 34 page tome, which I have read thoroughly. (more...)
Appliances such as microwave ovens, refrigerators, iPods, iPads and TVs are excellent examples of the ease-of-use approach. Bringing the inherently complex world of Oracle databases together with the ease-of-use approach of appliances is challenging. By definition if Oracle Exadata is an appliance then its use should be simple, require relatively little maintenance and like a refrigerator do its job which in this case is run databases at extreme performance levels. If Oracle Exadata isn’t an appliance than what is it?
I found this question (more...)
Method 2: Use new utility called NID
Steps to rename Databases using the new NID utility:
1.) Stop database
[oracle@testing1]~% srvctl status database -d test
Instance test1 is running on node testing1
Instance test2 is running on node testing2
srvctl stop database -d test
2.) startup mount the database:
[oracle@testing1]~% sqlplus / as sysdba
SQL*Plus: Release 184.108.40.206.0 Production on Thu Jul 21 00:50:44 2011
Copyright (c) 1982, 2010, Oracle. All rights reserved.
Connected to an idle instance.
There was an interesting index related performance problem on Stack Overflow recently. The problem was to check an input string against a table that holds about 2000 prefix patterns (e.g.,
LIKE 'xyz%'). A fast select is needed that returns one row if any pattern matches the input string, or no row otherwise.
I believe my solution is worth a few extra words to explain it in more detail. Even though it’s a perfect fit for Use The Index, Luke it’s a little early to put it as an exercise there. It is, however, a very good complement (more...)
This article describes the effects of a high row migration rate on the clustering factor and the optimizer’s ability to select the best execution plan.
In my previous article—Row Migration and Row Movement—I have demonstrated that the “insert empty, update everything” anti-pattern can lead to 100% row migration. This article continues the research on row migration and unveils surprising effects on the clustering factor. To be precise, the clustering factor can become completely bogus in presence of a very high row migration rate. Once the clustering factor is “wrong”, it’s just a finger exercise to construct an optimizer (more...)
This article talks about the emerging database (key/value database) and compares it to RDBMS. One of the interesting things being that you may not be able to perform JOIN operation. It is being described as the suitable model for cloud service provides (and pay-as-you-go service providers) and big players like Amazon (SimpleDB), Google (AppEngine Datastore), Microsoft (SQL Data services) have already started the offering. There are non-cloud providers too like - CouchDB (more...)