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October 2013

OTN Nordic Tour 2013 – Oslo

We got on the plane from Copenhagen to Oslo and met up with the OUGN folks for some food in the hotel. We spent a long time talking about non-Oracle stuff, like science and religion. It was fun.

The morning started with a long breakfast, which included me nearly throwing orange juice over Mike Dietrich and him succeeding in throwing tea over me. We both blamed the table, but in reality it was our secret desire for a food fight that caused it. :)

Ohio Oracle User Group last week

 

 


 

 

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Had a great time last week presenting to the Ohio Oracle User Group (OOUG). I’m generally use to presenting a single presentation but for this day at OOUG, I was the guest speaker and presented 4 back to back presentations.

OOUG members picked me up at the airport, whisked me to my hotel, then picked me up in the morning to take me to the conference venue, then arranged for my transport back to the airport. All in all super smoothly run.

WordPress 3.7

WordPress 3.7 has been released. The downloads are in the usual place.

I updated 5 blogs with not hassles.

It’s worth having a read of this, which mentions the automatic updates that could happen without your intervention… Sounds kind of scary to me. :)

Happy upgrading, possibly for the last time…

Cheers

Tim…

My Strata + Hadoop World Schedule

Next week is Strata + Hadoop World which is bound to be exciting for those who deal with big data on a daily basis.  I’ll be spending my time talking about Cloudera Impala at various places so I’m posting my schedule for those interesting in catching about fast SQL on Hadoop.  Hope to see you there!

Office Hour with Greg Rahn @ the Cloudera Booth
10/29/2013 11:00am – 11:30am EDT (30 minutes)
Room: 3rd Floor, Mercury Ballroom, Booth #403
http://www.cloudera.com/content/cloudera/en/new/strata-hadoop-world.html

Exadata: measuring IO latencies experienced by the cell server

Exadata is about doing IO. I think if there’s one thing people know about Exadata, that’s it. Exadata brings (part of the) processing potentially closer to the storage media, which will be rotating disks for most (Exadata) users, and optionally can be flash.

Hadoop Streaming, Hue, Oozie Workflows, and Hive

Elephant Painting

MapReduce with Hadoop Streaming in bash – Bonus!

OTN Nordic Tour 2013 – Copenhagen

I spent the first two sessions of the DOUG event watching Mike Dietrich presenting on 12c upgrades, pluggable databases and new features. I’ve seen some of his stuff already during the LAOTN Tour (Southern Leg), but his presentations have changed a little since I last saw them. To quote Noons,

“Mike’s talk is superb. No bull, just down to facts…”

I think that sums it up nicely. :)

Exadata: what kind of IO requests has a cell been receiving?

When you are administering an Exadata or more Exadata’s, you probably have multiple databases running on different database or “computing” nodes. In order to understand what kind of IO you are doing, you can look inside the statistics of your database, and look in the data dictionary what that instance or instances (in case of RAC) have been doing. When using Exadata there is a near 100% chance you are using either normal redundancy or high redundancy, of which most people know the impact of the “write amplification” of both normal and high redundancy of ASM (the write statistics in the Oracle data dictionary do not reflect the additional writes needed to satisfy normal (#IO times 2) or high (#IO times 3) redundancy). This means there might be difference in IOs between what you measure or think for your database is doing, and actually is done at the storage level.

OTN Nordic Tour 2013 – Stockholm

I didn’t sleep too well the night before the Stockholm event, so I woke up feeling extremely groggy. I think it was just the combination of excitement and adrenalin you get before starting a tour. I met Lonneke and Sten for breakfast, then headed on to the conference venue.

I watched Lonneke presenting on SOA for the first two sessions of the day. This is completely not my area of expertise, but I learnt a lot in these sessions. I now understand a lot of the buzzwords and a lot of the common pitfalls for the first time ever. I’ll never be a SOA guy, but it’s nice to know a little more, so that I can understand when people are leading me astray. You don’t have to know how to swim to recognise when someone is drowning. :)