…must maintain lists of objects of a given type. Secondary indices are a must and are trivial in a RDBMS.
Our production system in Hosted Chef started off in MySQL because we had deeper experience with MySQL on the team and already had MySQL running in our production environment. As we productized Private Chef, we realized we could not ship MySQL with Chef due to licensing issues. Using MySQL meant there would need to be an additional manual step to link Chef with the database. …
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- AkitaOnRails.com - English: Rails Podcast Brasil, QCon Special - Nick Sieger (JRuby) and Francesco Cesarini (Erlang)
- Damien Katz: Stabilizing Couchbase Server 2.0
- Plataformatec Blog: [Screencast] Elixir: Simple Object Orientation and charming syntax on top of Erlang
- Practicing Ruby: Issue #16: Interesting Ruby Hackers
- Litany Against Fear: Messaging with Ruby on Rails Notes
While certainly not in the same class as Hilarious Video: Relational Database vs NoSQL Fanbois or NSFW: Hilarious Fault-Tolerance Cartoon , this parody does have some really good moments:
- Topics: Video
On November 15th at 1PM Eastern / 10 AM Pacific, I will be giving a webinar entitled " The Hazards of Multi-writing in a Dual-Master Setup ". In my experience many people do not understand the difficulty of managing writes to RDBMS datastores in a high availability environment, especially where asynchronous replication is used (which is almost everywhere).
This talk gives an overview and concrete examples of how writing across dual-masters can and will break …
It's HighScalability Time:
1.5 Billion Pageviews : Etsy in September; 200 dedicated database servers : Tumblr
Quotable Quotes:
@ rbranson : Datadog stays available where it counts (metrics injest) by using Cassandra, combined with an RDBMS for queries. Nice.
@ jmhodges : Few engineers know what modern hw is capable of, in part, because the only people that see the numbers are in orgs that had to care or die.
The use of ephemeral storage in place of EBS volumes for Relational Database Management System ( RDBMS) data stores is still under internal discussion, and we need your feedback. If you have an opinion on the matter, head over to our docs and comment on the feature request .
What's Next?
That said, we still feel that RDBMSs are a perfect solution for 99% of the web applications that are deployed on Engine Yard Cloud. This is why we are working to offer performance gains …
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…Galera is how multi-node writing is implemented. This is highly simplified, but locking inside of an RDBMS can either be optimistic or pessimistic .
Pessimisic locking is what Innodb does as a transaction executes. All the locks it needs (or it thinks it needs) will be acquired throughout the course of the transaction. If a given statement in the transaction needs a lock, it will wait for that lock before proceeding (this is where deadlocks and lock wait timeouts can happen). By …
- MySQL Performance Blog: Understanding Multi-node writing conflict metrics in Percona XtraDB Cluster and Galera
…functionality above and beyond what traditional Relational Database Management Systems ( RDBMS) can do. Since last year, we've curated and maintained these recipes, and we QA them every time we introduce a new database version. Please let us know if there is a particular extension you'd like us to add; we're happy to help.
Want to know more?
Check out the following resources:
PostgreSQL's official Documentation .
RailsCast's fantastic series …
- Engine Yard Developer Blog: Database Stack End of Life Announcements
- giant robots smashing into other giant robots: PostgreSQL Conf East
- PeepCode Products: Meet PostgreSQL
- Trevor Turk: Links for 8-5-10
- The Curiosity Project: Backing Up Your Data With Fog
- MacRuby Posts: MacRuby 0.6
As you can see, it's pretty simple to use - a lot like a traditional RDBMS.
Hypertable
Now we move from an XML database to one designed to scale up to the biggest of jobs: Hypertable. As you'll see on the Hypertable website, it's been built for one purpose:
"... for the express purpose of solving the scalability problem, a problem that is not handled well by a traditional RDBMS ... Hypertable is based on a design developed by Google to meet their …
- High Scalability: Hypertable Routs HBase in Performance Test -- HBase Overwhelmed by Garbage Collection
- Vineet Gupta | Computer Programmer: NoSql Databases - Part 1 - Landscape
- pingles: MapReduce with Hadoop and Ruby
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…Oracle, SQLServer or MySQL. Whereas these are more of the traditional RDBMS variety, Berkeley DB is a library and consequently takes a different approach.
With Berkeley DB, you cannot access the database over a network via TCP. Instead, you have to make in process API calls and you don't have a table, row, column structure either.
Where as traditional RDBMS' place clear constraints on how you'll create the structure of your datastore and how it can be optimized, …
- paperplanes: February Reading List
- Litany Against Fear: Professional Ruby Conference Notes
- Lindsay Holmwood - auxesis' musings: Graphing collectd statistics in the browser with Visage
- High Scalability: Berkeley DB Architecture - NoSQL Before NoSQL was Cool
- Simone Carletti's Blog: Inside Ruby on Rails: Serializing Ruby objects with JSON
- processi: Parslet and JSON
…important. But strangely for web developers, the choice for data store was always made for them: an RDBMS.
The NoSQL movement introduced genuine choice in data stores for the first time in the Web era. The differences between MySQL and Postgres and Oracle started to look small when compared to the new paradigms available. The realization that a relational database isn't the only way to persist data is an epiphany.
Decades of RDBMS dominance led to dogma. Incontrovertible truths. …
- RubyLearning Blog: Clojure: A Chat with Andrew Boekhoff
- How Software is Built: Interview with Eliot Horowitz - CTO of 10gen / MongoDB
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- paperplanes: Notes on MongoDB