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mdb: All content tagged as mdb in NoSQL databases and polyglot persistence

Your Chance to Review the FOSDEM NoSQL Event

If you haven’t been able to make it to Brussels last week for the FOSDEM NoSQL devroom, you’ll probably be happy to hear that thanks to the organizers ☞ Outerthought and ☞ you’ll still have the chance to watch all of the FOSDEM NoSQL devroom sessions.

The agenda included the following presentations:

I will be adding slides and videos as they arrive.


Tim Anglade: NoSQL for Fun & profit

Kristina Chodorow: Introduction to MongoDB

Lars George: My life with HBase

Eric Evans: The Cassandra distributed database

Benoit Chesneau: CouchDB, a database designed for the web and more

Rob Tweed: MDB and MDBX: Open Source SimpleDB Projects based on GTM

George James: GT.M and OpenStreetMap

Stéphane Combaudon: Comparing the MapReduce in CouchDB with the SQL way in a RDBMS

Evert Arckens: Designing a scalable content management system on NoSQL technologies

You can read more about the event on these posts:

and check these ☞ awesome pictures from the event.

Introducing GT.M and M/DB

It’s always good to hear about NoSQL projects I’ve missed from the first versions of MyNoSQL. Now it is the case of ☞ GT.M, but thanks to Rob Tweed, starting today, MyNoSQL will also track GT.M and M/DB.

In case you, like me, are wondering what GT.M is, a good start would be the presentation ☞ “GT.M: A Tried and Tested Open-Source NoSQL Database”, from which I have found that GT.M, like kdb+ about which I’ve learned lately, has been in production for quite a long time (1986!).

The presentation is also introducing ☞ M/DB which is an open source emulation of Amazon SimpleDB that was built on top of GT.M

According to Rob:

It’s in fact a good example of something that has been discussed in the last couple of days in the NoSQL Google Group: namely where a schemaless key/value database (in this case GT.M) can be used as the raw pallette on which another database view (in this case the SimpleDB APIs and database behaviour) can be modelled.

It turns out that the SimpleDB behaviour can be very simply modelled on top of GT.M: in fact the first version from concept to production roll-out just took me a week: it was that close a fit!

If you look at ☞ GT.M for the Python Programmer doc (page 14) you’ll see a section “M/DB: GT.M in Action” that will perhaps provide some more insight on the connection between the two.

Update: It looks like Google has some problems returning good results for searches on GT.M and M/DB.

No Relation: The Mixed Blessings of Non-Relational Databases

A paper by Ian Thomas Varley, M.S.E. covering the following aspects of non-relational databases:

  • use cases
  • pros and cons
  • design strategies

The paper in PDF format can be downloaded from ☞ here