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July 2014

SAP deployed with Delphix

How does Delphix benefit a SAP project?

  • Speed up time to delivery for ASAP implementation methodology
  • Enable adoption of “Continuous Application Delivery” methodology
  • Reduce infrastructure overhead
  • Deliver higher quality projects

ASAP methodology is a framework for delivering large IT projects. SAP professionals are familiar with this, however given the size and complexity of SAP projects, many fail to fully adopt it. Delphix helps customers adopt and use ASAP methodology.

SAP Projects today are big, hairy beasts. They are 18 months + and it is extremely difficult to do more than one project at a time. Delphix helps SAP customers move to a continuous development model where they are no longer delivering one or two massive projects a year, but are delivering smaller, more nimble projects on an on-going basis.

Once we’ve establish what Delphix does for projects, we want to give a few examples.

Oracle Midlands : Event #4 – Summary

What a cracking Oracle Midlands event!

The evening started with a session on “Designing Efficient SQL” by Jonathan Lewis. The first few slides prompted this tweet.


When someone asks me a question about SQL tuning my heart sinks. It’s part of my job and I can do it, but I find it really hard to communicate what I’m doing. Jonathan’s explanation during this session was probably the best one I’ve ever heard. Rather than trying to explain a million and one optimizer features, it’s very much focussed on a “What are you actually trying to achieve?” approach. It should be mandatory viewing for all Oracle folks.

After the break, where I stuffed myself with samosas, it was on to the lightning talks (10 mins each).

Presenting at UKOUG Tech14 Conference (Ian Fish, U K Heir)

I’ve been lucky enough to present at various conferences, seminars and user group events over the years in some 20 odd countries. But somewhere I’ve never quite managed to present at before is the place of my birth, the UK. Well this year, I’ve decided end my drought and submitted a number of papers for the UKOUG Tech14 Conference and […]

What books by what authors should I read?

I’ve been asked the same question by multiple people, around what books by what authors are good to have, so let me answer it once here. :)

The answer is easy – it depends! Are you interested in database administration? Application development against an Oracle database? Technical apps? Functional apps? High Availability? Enterprise Manager? No single author covers all of those – unless you count the Oracle documentation set as a single author.

Orion I/O calibration tool bug

I use fio for all my I/O testing. Why not Orion from Oracle since almost all of my I/O testing and benchmarking has been geared toward Oracle? Several reasons

fio is

  • super flexible – able to configure it for almost all types of test
  • active community – updates almost every week, many by Jens Axobe (who wrote much of the Linux I/O layer)
  • reliable – if there are problems, it’s open source and one can discuss on the fio commuity email list
  • easy to distribute – just one executable, doesn’t require getting for example a full Oracle distribution

Orion on the other hand unfortunately has had some problems that have made it too undependable for me to trust.

Associative arrays and Nested tables

A common criticism of PLSQL is that the "original" array datatype, now called associative arrays are perfect for passing stuff back and forth to 3GL environments (for example .Net),  but canno be used within SQL natively, for example:

Deferrable RI – 2

A question came up on Oracle-L recently about possible locking anomalies with deferrable referential integrity constraints.

Exadata storage indexes and DML

Last week I’ve gotten a question on how storage indexes (SI) behave when the table for which the SI is holding data is changed. Based on logical reasoning, it can be two things: the SI is invalidated because the data it’s holding is changed, or the SI is updated to reflect the change. Think about this for yourself, and pick a choice. I would love to hear if you did choose the correct one.

First let’s do a step back and lay some groundwork first. The tests done in this blogpost are done on an actual Exadata (V2 hardware), with Oracle version (meaning bundle patch 6). The Exadata “cellos” (Cell O/S) version is on both the compute nodes and the storage nodes.

Downloading VirtualBox VM “Oracle Enterprise Manager 12cR4″

Strangely enough those cool VirtualBox VM machine downloads are nowadays a bit scattered on different Oracle places on and others. So in all that...
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Swimming Progress

While I was at BGOUG I went for swim each morning before the conference. That got me to thinking, perhaps I should start swimming again…

It’s been 4 weeks since I got back from the conference and I’ve been swimming very morning. It was a bit of a struggle at first. I think it took me 2-3 days to work up to a mile (1600M – about 9M short of a real mile). Since then I’ve been doing a mile each day and it’s going pretty well.