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Displaying posts with tag: NoSQL (reset)
On PostgreSQL. Interview with Tom Kincaid.

“Application designers need to start by thinking about what level of data integrity they need, rather than what they want, and then design their technology stack around that reality. Everyone would like a database that guarantees perfect availability, perfect consistency, instantaneous response times, and infinite throughput, but it´s not possible to create a product with [...]

Exploring SAP HANA – Powering Next Generation Analytics

SAP HANA , having entered the data 2.0/3.0 space at the right time, has been getting traction lately; and there will be lot of users like me who wants to[...]

From Oracle to 10gen, The MongoDB Company

Those who are familiar with me know I've a dream.

5 years ago I decided to leave a systems integrator where I was doing great. Why? I wanted to be in a company with the same growth prospects that Oracle had in the 80s. I dreamed to be in the Oracle of 30 years ago and, as time travel wasn't affordable, I decided to join MySQL AB to help expand the business in Europe, the Middle East and Africa.
A few years later my dream came true, but in a slightly different sense. Sun acquired MySQL and was later swallowed by Oracle giving me the opportunity to join the company I wished I could have helped build.

Oracle is an amazing …

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Slides from Failover or not Failover, that is the question

Below are the slides from my last talk at this Percona Live Worldwide MySQL Conference. The idea for this talk was proposed by my co-presenter Massimo Brignoli and goes back to a debate on this topic that went through the MySQL blogosphere during last Autumn - which in itself was sparked by an outstanding retrospective published about a MySQL failure at Github.

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Percona Live - Keynote: How MySQL can thrive in the world of massive data hype

  Continuent CEO Robert Hodges says that NoSQL solutions are oversold, but this is no reason for MySQL fans to become complacent. He kicked off Day 2 of the Percona Live MySQL Conference and Expo with his keynote, "How MySQL can thrive in the world of massive data hype."He said there are new challenges in data management, and relational databases must solve them or risk becoming irrelevant. This

MySQL Cluster Tutorial: NoSQL JavaScript Connector for Node.js

This tutorial has been authored by Craig Russell and JD Duncan

The MySQL Cluster team are working on a new NoSQL JavaScript connector for MySQL. The objectives are simplicity and high performance for JavaScript users:

- allows end-to-end JavaScript development, from the browser to the server and now to the world's most popular open source database

- native "NoSQL" access to the storage layer without going first through SQL transformations and parsing.

Node.js is a complete web platform built around JavaScript designed to deliver millions of client connections on commodity hardware. With the MySQL NoSQL Connector for JavaScript, Node.js users can easily add data access and persistence to their web, cloud, social and mobile applications.

While the initial …

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MongoDB Multi-Statement Transactions? Yes We Can!

Earlier, I talked about the transactional semantics we are introducing to MongoDB. As I hinted at the end of the post, we are actually doing more. We are introducing multi-statement transactions. That’s right, multiple queries, updates, deletes, and inserts will be able to run inside of a single transaction. We are working on the details of the semantics as we develop our beta, but at a high level, think of it as having the same semantics as TokuDB and InnoDB’s multi-statement transactions in MySQL.

So how will it work? We introduce three new commands:

db.runCommand({"beginTransaction", "isolation": "mvcc"})

This begins a transaction with the isolation level of MVCC, which means queries will use a snapshot of the system. This is essentially the same as “repeatable-read” in MySQL. Isolations of …

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MongoDB Transactions? Yes

People claim that MongoDB is not transactional. It actually is, and that’s a good thing.

In MongoDB 2.2, individual operations are Atomic. By having per database locks control reads and writes to collections, write operations on collections are Consistent and Isolated. With journaling on, operations may be made Durable. Put these properties together, and you have basic ACID properties for transactions.

The shortcoming with MongoDB’s implementation is that these semantics apply to individual write operations, such as an individual insert or individual update. If a MongoDB statement updates 10 rows, and something goes wrong with the fifth row, then the statement will finish execution with four rows updated and six …

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See You at Percona Live 2013!

Percona Live 2013 is coming up fast.  This is hands-down the best MySQL conference of the year, attended by a lot of people I really respect.  Check the speaker list if you need some of their names.  I will also be doing two talks myself.

  • 9am Wednesday 24 April - Keynote:  How MySQL Can Thrive in the World of Massive Data Hype.  NoSQL solutions are oversold, but this is no reason for complacency in the MySQL community.  There are new challenges in data management, and we need to solve them or become irrelevant.   I will show some of the advances Continuent has on tap …
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They say: "Relational Databases Aren't Dead"

This is a good read, claiming: "Relational Databases Aren't Dead. Heck, They're Not Even Sleeping", http://readwrite.com/2013/03/26/relational-databases-far-from-dead. A key quote:
"While not comprehensive, the uses for NoSQL databases center around the acquisition of fast-growing data or data that does not easily fit within uniform structures."
There were 2 parts in the statement about NoSQL's uses. I'll start with the latter:


"data that does not easily fit within uniform structures" - NoSQL is probably the right choice, hmm although I always encourage thinking and architecting in advance. And also online structure changes do exist in the RDBMS world and recently in MySQL: …

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