Feeds

Amazon fires up worldwide Read Replicas for hosted MySQL

Write on one continent, read from replicas nearby

Build a business case: developing custom apps

Developers that use the hulking Amazon Web Services infrastructure cloud can now shift Read Replicas of data into other global data center hubs.

The new feature was announced at the web giant's re:Invent show earlier in November and has now been made available. Previously, Read Replicas could only be shifted about within available zones. Now they can be flung across continents.

Read Replicas are an Amazon creation that uses MySQL's internal replication features to brew up a special instance type that reflects changes made to a master database.

Up to five Read Replicas can be created for a single database instance, the company says. AWS admins will be charged for the data transferred out of the source region.

By allowing Read Replicas to be shifted between geophysical regions, Amazon has made it possible for developers to write into a single hosted MySQL Relational Database Service (RDS) system and then replicate elsewhere.

This saves them money, increases redundancy, and lowers latency, though the tech is not a good fit for applications that expect to efficiently handle write commands from multiple servers spread around the world.

"Cross Region Read Replicas are available for MySQL 5.6 and enable you to maintain a nearly up-to-date copy of your master database in a different AWS Region," Amazon CTO Werner Vogels wrote in a blog post that described the service.

"In case of a regional disaster, you can simply promote your read replica in a different region to a master and point your application to it to resume operations. Cross Region Read Replicas also enable you to serve read traffic for your global customer base from regions that are nearest to them."

The technology is available in all AWS regions except GovCloud, the company said.

By comparison, Google's own Compute Engine "CloudSQL" tech provides both synchronous and asynchronous replication but it does not appear to offer trans-continental copying in a relatively simple manner, as Amazon does.

Windows Azure's SQL Database is able to perform similar replication features, though it is unclear from Microsoft documentation that Redmond admins can get the granularity offered by Amazon with Read Replicas.

With the rollout of Read Replicas, Amazon has further increased the capabilities of RDS, sending a clear message to devs that if they want to get at new features they need to move off of the already deprecated AWS SimpleDB tech. ®

Boost IT visibility and business value

More from The Register

next story
Sysadmin Day 2014: Quick, there's still time to get the beers in
He walked over the broken glass, killed the thugs... and er... reconnected the cables*
Auntie remains MYSTIFIED by that weekend BBC iPlayer and website outage
Still doing 'forensics' on the caching layer – Beeb digi wonk
SHOCK and AWS: The fall of Amazon's deflationary cloud
Just as Jeff Bezos did to books and CDs, Amazon's rivals are now doing to it
VVOL update: Are any vendors NOT leaping into bed with VMware?
It's not yet been released but everyone thinks it's the dog's danglies
BlackBerry: Toss the server, mate... BES is in the CLOUD now
BlackBerry Enterprise Services takes aim at SMEs - but there's a catch
prev story

Whitepapers

Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
The Essential Guide to IT Transformation
ServiceNow discusses three IT transformations that can help CIO's automate IT services to transform IT and the enterprise.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
How modern custom applications can spur business growth
Learn how to create, deploy and manage custom applications without consuming or expanding the need for scarce, expensive IT resources.
Build a business case: developing custom apps
Learn how to maximize the value of custom applications by accelerating and simplifying their development.