It's a well known deficiency of most existing sampling Java profilers that their collection of stack traces has to happen at a safe point. A while back Jeremy Manson open sourced some proof of concept code where calls are made to the AsyncGetCallTrace JVMPI method which avoids the need for threads to reach a safe point in order to read their call trace. I've taken this code dump and started converting it into a usable open source project.
Beanstalkd is a simple job queue and has great PHP support in the shape of Pheanstalk. Beanstalkd is a job queue rather than a message queue, so when you put things on the queue (or "tube" as they seem to be called in Beanstalkd), they stay there until a worker comes along and processes each one successfully.
If you're looking for a practical application to help you get started with MongoDB (or Node.js, or Express.js, for that matter), you might be interested in this presentation from Karan Goel on getting started with Node.js, Express.js, and MongoDB. You can find the video below, and Goel's slides here.
Stackato micro cloud runs on VMware hypervisors, KVM, Xen, Virtualbox, naturally meaning it can run on vSphere, Openstack, or CloudStack. We keep emphasizing that you can run Stackato on any hypervisor. We wanted to show you the strength of easily moving your applications to ANY cloud environment.
Sometimes you want to set the state of your project back to a previous commit, but keep the history of all the preceding changes. You want to make a commit that reverses all the changes between your previous commit and the current HEAD.
In particular, we current have over three thousands tests, and they take hours to run. We are doing a lot of stuff there “let us insert million docs, write a map/reduce index, query on that, then do a mass update, see what happens”, etc.
The key challenges around compensation, at least for me, center around figuring out how to reward individual performance without encouraging internal competition, local optimization, or one person feeling rewarded while another feels punished. You want compensation to motivate people, not to have a negative impact on performance.
For our Underutilized iOS Feature Of The Week award, how about UITextField/UITextView’s inputView field? Probably pretty much totally overlooked it, haven’t you? Here’s a sample implementation for next time something like that strikes your fancy.
There's been a lot of discussion on the internet about the definition of Platform-as-a-Service. The interesting thing is that the sheer breadth of the discussion makes it very difficult to nail down exactly what it is. This article presents a few ideas about defining PaaS.
This article includes an original presentation about AngularJS given as a slideshare. This article includes the original 20-minute screencast about AngularJS. The slideshare shares the author's thoughts on the learning process and resources that he felt were particularly helpful.
Agile software development is not about productivity; it’s about working well. Yes, I think there are potential gains in productivity for most teams. Even then, the bulk of the gains are from “maximizing the work not done” rather than becoming more efficient programmers.
Sharding in MongoDB and TokuMX does a great job of scaling an application beyond what a single machine can do, but it also brings new challenges to the table. One of those challenges is how to deal with the impact of migrations on the running system.
The current version of Oozie (4.0.0) doesn’t build correctly when you try and target Hadoop 2.2. The Oozie team have a fix going into release 4.0.1 (see OOZIE-1551), but until then you can hack the Maven files to get it working with 4.0.0.
It’s sometimes easy to assume that the clusters of commodity servers commonly associated with big data have made high performance computing (HPC) installations a thing of the past. But Robert Clyde argues that HPC has evolved, and that the machines in HPC labs now look an awful lot like regular computers.