Items tagged google, appengine
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App Engine at Google I/O 2010. OpenID and OAuth are now baked in to the AppEngine users API. They’re also demoing two very exciting new features—a mapper API for doing map/reduce style queries against the data store, and a Channel API for building comet applications. # 20th May 2010, 3:30 pm
App Engine outage postmortem. Interesting peek behind the scenes. The primary cause of the error was a bug in a GFS (Google File System) Master server caused by a MapReduce process sending a malformed filehandle, reminiscent of the error which took down S3 last year. # 9th July 2009, 12:49 pm
Offline Processing on App Engine: a Look Ahead. A session at IO next week: “App Engine was designed to run request-driven web applications, although this will change in the coming year with the release of a number of offline computing components. In this session, we’ll explore the task queue/executor model of computation and some of the more interesting applications.” # 20th May 2009, 12:40 pm
Running Rhino and Helma NG on Google App Engine. Helma NG is a JavaScript web app framework, which now works on App Engine out of the box. # 12th April 2009, 12:52 pm
Using Scala with Google App Engine. Scala works, but I haven’t seen confirmation on actors yet (which are likely to break due to their dependency on threads). # 11th April 2009, 3:28 pm
Dynamic languages on Google App Engine—an overview. Ola Bini’s notes on exploring the new Java support for App Engine with the aim of getting JVM dynamic languages such as JRuby running. Restrictions include a complete lack of threads (which will make it hard to get Scala up and running), but JRuby trunk now works without modification. # 8th April 2009, 2:08 pm
App Engine: Scheduled Tasks With Cron. Cron tasks simply hit a URL on your application, and can be run as frequently as once a minute. They made up their own syntax, which much nicer than traditional unix cron. # 8th April 2009, 2:04 pm
django-gae2django. An implementation of the Google App Engine API (datastore, memcache, urlfetch, users and mail) that runs on Django, allowing you to take an existing application written for App Engine and deploy it on your own server on top of Django. # 9th March 2009, 3:37 pm
Google App Engine 1.1.9 boosts capacity and compatibility. Niall summarises the recent changes to App Engine. urllib and urllib2 support plus massively increased upload limits and request duration quotas will make it a whole lot easier to deploy serious projects on the platform. # 16th February 2009, 8:35 pm
Yahoo! Query Language thoughts. An engineer on Google’s App Engine provides an expert review of Yahoo!’s YQL. I found this more useful than the official documentation. # 9th February 2009, 10:29 pm
Google App Engine: A roadmap update! Receiving e-mail, background tasks and XMPP. I predict a bunch of sites will start building small parts of their overall functionality on App Engine when some of these features land (much easier than hosting your own custom XMPP server). # 9th February 2009, 7 pm
Sharding Counters on Google App Engine. “While the datastore for App Engine scales to support a huge number of entities it is important to note that you can only expect to update any single entity, or entity-group, about five times a second”. This article explains a technique for sharding writes across multiple counters in detail, including a way to keep a memcache counter updated at the same time for faster reads. # 27th January 2009, 8:27 pm
Why Google App Engine is broken and what Google must do to fix it. Aral Balkan describes a number of critical issues with App Engine. If you’re considering building something serious on it you need to read this article; I’ve run in to several of these problems myself just running toy projects on the platform. Here’s hoping they get addressed in the near future. # 3rd October 2008, 10 pm
We haven’t changed the name of the conference to “Over Quota”. Aral is having intermittent App Engine quota problems, which are proving impossible to debug. I had a similar problem with an App Engine app a while ago—the quota / debugging story really needs fixing. # 3rd September 2008, 1:37 pm