#ruby vm

Thanks for coming out to the October meetup.

Below you'll find the links to the slides and speakers, and also a preview of the scheduled talks for this month.

1. What happened?

1.1 Elaine Cooper's gave a Lightning Talk titled "5 Quick Switches … Improve Your Life One Easy Change At a Time."

Her slides are forthcoming. Check back here for an update later.

Links:

Connect with Elaine on Facebook: here

You can get her recipes by subscribing to her newsletter.

Here's a pic she shared from the evening. :)

1.2 Craig Lehmann and Robert Young gave a Lightning Talk on the Ruby VM titled "Ruby Under The Hood"

Links:

Slides: here

We don't have any links to connect with Craig or Robert, but feel free to get in touch if you'd like to be put in contact with them.

1.3 Zhifu Ge gave us a talk titled "TDD For Coding Practices" and did a live TDD session, working through a practice problem from Codility

Links:

Slides: here

We don't have any links to connect with Zhifu, but feel free to get in touch if you'd like to be put in contact with him.

1.4 Also, in case you missed it back in June… Ahmed Omran's talk on Working with Legacy Rails Apps

Ahmed Omran @this_ahmed gave a talk at the June meetup on Working With Legacy Rails Apps. You should check out the slides below.

Links:

Slides: here

Connect with Ahmed: @this_ahmed

Ahmed's Blog: aomran.com

Sorry for not getting this sent out sooner.

2. What's Up for November?

So far, we have two talks lined up for this month's meetup:

2.1 Lightning Talk: Nick Nikolov will be giving a talk titled "Booleans... with three possible values?"

Description: When using RoR with MySQL the boolean fields may end up having a third, unexpected value. This presentation will explain why and how this might happen and what to do if you wish to correct it.

2.2 Zhifu Ge will be giving us a talk about… something. ;)

3. Call for an Intermediate/Advanced Talk

We're looking for an Intermediate or Advanced talk for November.

Feel free to email back if you'd like to give a talk, or fill in this Talk Proposal Form.

4. Plan on coming? RSVP

You can RSVP for the meetup here:

--> http://www.meetup.com/OttawaRuby/events/224523705/

5. Thanks all!

Hope to see you at the next Ruby meetup, or at Web Project Night!

Monty Williams (VMWare/GemStone) interviewed by Werner Schuster:

MagLev VM takes full advantage of GemStone/S JIT to native code performance, distributed shared cache, fully ACID transactions, and enterprise class NoSQL data management capabilities to provide a robust and durable programming platform. It can transparently manage a much larger amount (terabytes) of data and code than will fit in memory.

I don’t think of MagLev only as a Ruby VM that has an integrated NoSQL database. I think of MagLev as a NoSQL database that uses Ruby for its data manipulation language.

The one thing I don’t think people have wrapped their heads around is MagLev provides a “single object space”. Nothing has to be sent/retrieved to/from a separate DB. All your code is executed “in the database.” You don’t even need to keep track of which objects have been modified so you can flush them to disk. MagLev handles that automatically. 

You can store any Ruby object, even procs, lambdas, threads, continuations. Here is an example of stopping, copying, saving, and restarting Threads in a different VM than they originated in. blog.bithug.org/2011/09/maglev-debug

MagLev persistence is akin to Image Persistence, i.e. objects are persisted to disk in the same format they are in shared cache. You don’t need to marshal them or convert them to JSON or another format.

MagLev transactions are ACID, which means that multiple VM’s can interact with the same repository and share state, objects, and code while maintaining referential integrity.

When you start a new MagLev VM, code loaded by another VM is likely to still be in the cache. So loading/requiring it can be quite fast.

Am I the only one confused by the mouthfullness of the above “NoSQL OODB” description?