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Phil (aka MP3Monster)'s Blog

~ from Technology to Music

Phil (aka MP3Monster)'s Blog

Monthly Archives: August 2018

Oracle Developer Podcast – Developer Evolution

19 Sunday Aug 2018

Posted by mp3monster in development, General, Oracle, Technology

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developer, Oracle, podcast

podcast-356-dev-evolutionLast month I was fortunate enough to have been invited to participate in another Oracle Developer Podcast.  Rather than focusing on specific technologies, this focused on more how the thew job market is changing for IT and what might be driving change, and how things may change in the future. Check it out here.

As ever thanks to Bob Rhubart of the invitation, and putting together these excellent recordings.

Blue Notebooks

19 Sunday Aug 2018

Posted by mp3monster in General, Music, Music Reviews

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"Blue Notebooks", "Max Richter", Music, review, Sonos, Spotify

Whilst Sonos might be great for convenience, and Spotify for freedom and trying music out you still can’t beat well produced physical media (those round silver or black things) on some separates HiFi. I don’t have an extravagant setup, but what I can do with Max Richter’s The Blue Notebooks Anniversary Edition makes the hairs on your arms standup.

Take On The Nature Of Daylight and the violins float over the Cellos and eventually resolve together. It sounds so elegiac and so sad it can take you to tears. Then Iconography sounds almost other worldly with a base notes so deep that you physically feel as much as hear them.

The piano of Vladimir’s Blues each note is distinct and you can hear the decay of each and every note, so very blue.

Old Song comes on incredibly cinematic, as if you are sat listening to someone in another room playing the piano with your window open. You hear ambient background of a plane flying past and a train in the distance, a wood pigeon in the garden cooing.

The Trees brings together strings and piano, a wonderfully written and performed piece as the melody seems to move between the different instruments he other parts take terms to propel the music along or provide notes emphasising the melody. As the piece progresses the momentum gains and the the dynamic range expands with greater deeper notes and the experience becomes ever more physical as an experience.

The album closes with Written In The Sky, which whilst still in a minor key, seems to evoke a small sense of hope. When it comes to an end, you sit wanting more, but routed to your seat not wanting to move away from centre of an amazing performance.

If you go to a proper separates HiFi shop, which has listening rooms to try out audio setups, I think this would apart from the musical beauty would help show you see if the kit being tried magic of the kit being tried.

GraalVM – why a different VM?

09 Thursday Aug 2018

Posted by mp3monster in development, General, Oracle, Technology

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container, GraalVM, java, Oracle, polyglot

If you read press around Java you’ll have come across references to GraalVM. So what is it and why would I use it?

There is an excellent podcast from Software Engineering Daily that digs into the subject and can be found here and here. But let draw out some of the reasons as to why GraalVM is interesting.

Whilst multiple languages on top of the JVM is nothing new, such as Scala , Kotlin, and Groovy to name a few, GraalVM through the use of its Truffle framework takes it a new level. Truffle provides an Abstract Syntax Tree (AST) which describes the language syntax (more here about AST). The net result is any language can be described and therefore executed using the GraalVM. To this end the GraalVM team have got Node and JavaScript ported in addition to defining existing languages using this approach. Not all of this is proven robustly in production, but some of the languages VM certainly is, for example Twitter have been using the Scala port.

Because the languages are described through the same framework this means the work to optimise the VM performance becomes a lot easier.

It would be easy to assume that using the framework would mean the execution of languages using this mechanism would slow be slower. But, Truffle works by translating the code to standard byte code before execution, so ‘ported’ languages are now no less efficient than Java come runtime.

There is an interesting bi-product of this model, that at runtime with the right object exposures it is possible for multiple languages to interact with the same object easily, no JNI or dropping to the lowest common denominator such as a JSON+REST. This does raise interesting possibilities for thick client solutions or polyglot monoliths!

Probably one of the biggest pay offs for using GraalVM and its ability to run multiple languages is that the base Container images can be simplified as you don’t need different container images. This makes the work of patching and testing configurations of these container a lot simpler as the permutations will drop, particularly for organisations that have wholehearted embraced polyglot micro-service ideas.

One common reason for changing implementations of the JVM particularly at the more performance sensitive use cases (checkout Azul as an example) is how the JVM is optimised and the JIT algorithms and processes particularly the Garbage Collector work (checkout this list of JVMs. For example GraalVM will provide better performance for processes that less heap hungry than Oracle’s JVM.

It is interesting that Oracle are investing in a new VM when it wasn’t that long ago that JRockit was wound down. Given the legal dispute between Oracle and Google (see here) the new VM would give Google a means to escape from the copyright breaches and retain support for Java.

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