Dirty Cache

Oracle LMS response to licensing on VMware

Bart Sjerps 2016-03-21 Oracle, Virtualization

fineprint Last week I was in London to attend the UK Oracle User Group licensing event. After a number of sessions with excellent material leading to very interesting discussions (one was showing – with permission – some of my own content, with the comment that it saved this customer “a shitload of money” – thanks John for the mention :), there was a session from Oracle LMS UK (License Management Services).

A few interesting points from their presentation are worth sharing as otherwise you would not get much insight in the working methods of LMS.
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Oracle on VMware: Caging the license dragon

Bart Sjerps 2016-03-03 Oracle, Virtualization

Virtualizing databases has huge financial and operational benefits – in particular with Oracle, where physically deployed database servers are typically heavily under-utilized which leads to huge over-spending on license cost.

Of course poor efficiency on database servers leads to higher processing requirements, to higher number of CPUs purchased, and in turn to massive additional license and maintenance revenue for the software vendor.

No surprise that software vendors attempt to stop or delay efforts to reduce poor efficiency in any way they can, using all the tricks in the playbook plus a number of dirty tricks that you will never find in books on business ethics.

mouse-trap-helmet-small The latest roadblock Oracle has come up with is what we’ll refer to as the VMotion trap.

Disclaimer: I will not be liable for any false, inaccurate, inappropriate or incomplete information presented in this post. If you want to use the information in this post, verify the legal implications yourself or with advise from an independent, specialized 3rd party.

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The IOPS race is over

Bart Sjerps 2016-02-08 Oracle, Performance

emc-f1-car Infrastructure has always been a tough place to compete in. Unlike applications, databases or middleware, infrastructure components are fairly easy to replace with another make and model, and thus the vendors try to show off their product as better than the one from the competition.

In case of storage subsystems, the important metrics has always been performance related and IOPS (I/O operations per second) in particular.

I remember a period when competitors of our high-end arrays (EMC Symmetrix, these days usually just called EMC VMAX) tried to artificially boost their benchmark numbers by limiting the data access pattern to only a few megabytes per front-end IO port. This caused their array to handle all I/O in the small memory buffer cache of each I/O port – and none of the I/O’s would really be handled by either central cache memory or backend disks. This way they could boost their IOPS numbers much higher than ours. Of course no real world application would ever only store a few megabytes of data so the numbers were pure bogus – but marketing wise it was an interesting move to say the least.

With the introduction of the first Sun based Exadata (the Exadata V2) late 2009, Oracle also jumped on the IOPS race and claimed a staggering one million IOPS. Awesome! So the gold standard was now 1 million IOPS, and the other players had to play along with the “mine’s bigger than yours” vendor contest.
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Baking a cake: trading CPU for IO?

Bart Sjerps 2016-02-01 Oracle, Performance, Virtualization

Sometimes I hear people claim that by using faster storage, you can save on database licenses. True or false?

The idea is that many database servers are suffering from IO wait – which actually means that the processors are waiting for data to be transferred to or from storage – and in the meantime, no useful work can be done. Given the expensive licenses that are needed for running commercial database software, usually licensed per CPU core, this then leads to loss of efficiency.

Let’s see if we can visualise the problem here with a common world example – Baking a cake.

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Looking forward: 2016

Bart Sjerps 2016-01-13 General, Various

We’re already over one week in 2016 and I realize I haven’t done much blogging lately.

One of the things that kept me busy is development on Outrun, and the joint Oracle / EMC Solution Center (OSC) on which I intend to write a bit more going forward.

Something I did about a year ago (without mentioning it too much) is upgrade my WordPress.com account to Professional. Not that I really need the extra add-ons, but I want my readers not to be disturbed by ads – OK, there’s ad blockers, but not everyone uses them, and on some platforms you simply can’t (iOS). Dirty Cash well spent (and no, I don’t get it reimbursed by my employer if you’d think that, my blog is mine, mine only and independent).

adblockwelcome Given that the number of page views on Dirty Cache passed a quarter million last year (thanks to all my readers), can you imagine the savings in bandwidth and productivity loss by not showing ads? 😉

So what else can you expect from me this year?

Of course, more about running Oracle on EMC and why I think that’s a pretty good idea. As the competition with Oracle is heating up, I intend to write more on comparing the differences between the solutions of both companies, debunking some marketing and competitive claims, and more. I also hope to find time to maintain the wiki on the Outrun site, and in addition to Outrun documentation, it might be a good place to put Oracle / EMC related howto’s, best practices, FAQs and more.

You also might be wondering what’s going to happen around Oracle / EMC solutions during the Dell / EMC aquisition… Me too. But we can’t (and are not allowed to) comment on it until the merger is final. Until then, business as usual. When the time is ready I’ll comment on new Dell / EMC / Oracle stuff where possible.

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