Saturday, December 21, 2013

How-to: Manage Permissions in Hue

Hue is a web interface for Apache Hadoop that makes common Hadoop tasks such as running MapReduce jobs, browsing HDFS, and creating Apache Oozie workflows, easier. (To learn more about the integration of Oozie and Hue, see this blog post.) In this post, we’re going to focus on how one of the fundamental components in Hue, Useradmin, has matured.

New User and Permission Features

User and permission management in Hue has changed drastically over the past year. Oozie workflows, Apache Hivequeries, and MapReduce jobs can be shared with other users or kept private. Permissions exist at the app level. Access to particular apps can be restricted, as well as certain sections of the apps. For instance, access to the shell app can be restricted, as well as access to the Apache HBaseApache Pig, and Apache Flume shells themselves. Access privileges are defined for groups and users can be members of one or more groups.

Changes to Users, Groups, and Permissions

Hue now supports authentication against PAM, Spnego, and an LDAP server. Users and groups can be imported from LDAP and be treated like their non-external counterparts. The import is manual and is on a per user/group basis. Users can authenticate using different backends such as LDAP. Using the LDAP authentication backend will allow users to login using their LDAP password. This can be configured in /etc/hue/hue.ini by changing the ‘desktop.auth.backend’ setting to ‘desktop.auth.backend.LdapBackend’. The LDAP server to authenticate against can be configured through the settings under ‘desktop.ldap’.
How-to: Manage Permissions in Hue >>

Welcome, KijiMR

The following guest post is provided by Aaron Kimball, CTO of WibiData.
The Kiji ecosystem has grown with the addition of a new module, KijiMR. The Kiji framework is a collection of components that offer developers a handle on building Big Data Applications. In addition to the first release,KijiSchema, we are now proud to announce the availability of a second component: KijiMR. KijiMR allows KijiSchema users to use MapReduce techniques including machine-learning algorithms and complex analytics to develop many kinds of applications using data in KijiSchema. Read on to learn more about the major features included in KijiMR and how you can use them.
KijiMR offers developers a set of new processing primitives explicitly designed for interacting with complex table-oriented data. The low-level batch interfaces available in MapReduce include basic InputFormat and OutputFormat implementations. The raw APIs are designed for processing key-value pairs stored in flat files in HDFS. Integrating MapReduce with HBase via InputFormat and OutputFormat APIs is hard to do from scratch in every algorithm. In KijiMR, we have extended the available MapReduce APIs to include

Read complete post: Welcome, KijiMR

How Apache Hadoop Helps Scan the Internet for Security Risks

How Apache Hadoop Helps Scan the Internet for Security Risks

Saturday, February 2, 2013

Best Cloud Storage Service: Google Drive versus SkyDrive

The days of cloud computing has come to stay and that is very much evident. With so many players around, including Dropbox, Amazon Cloud Drive, Google Docs and SkyDrive, users could not have asked for more. The advantages of using cloud drives are not difficult to see. You can access your files anytime you want, anywhere you want, keep it safe from your computer’s hard disk failure and collaborate with users over long distances. But not all these cloud services are equal and that is not what was intended either. Each had its own reasons to stay ahead of the crowd.

Google Drive was certainly among the best that you could have wanted in an iCloud environment, but Google choose to take the competition ahead against SkyDrive. They are not made equal and each has its own pros and cons, mostly pros. Here are some comparisons that you may want to consider before signing up for one or the other. That there are differences between the two services don’t necessarily mean that the other two from outside lack in features. In fact, besides the Google Drive and SkyDrive, Dropbox and Amazon Cloud Drive too seem to be performing well.
Here is how Google Drive and SkyDrive compare against each other.

Interface Differences Mean Lots to Users
At least on the interface front both don’t seem to have much differences, but then that they have a lot in common with Dropbox, is something to note. Both sync well and everything is plain and simple. If you still want a result for the competition, there is nothing to say what makes one better over the other.

What is the future of cloud computing in 2013 and beyond?


Over the past several years, the introduction of cloud computing has made room for many advancements in computer technology and has changed the way many companies do their business. It has created opportunities for work to be done remotely with greater ease, has helped with sharing files, and has taken pressure off the finite memory of computers and smart devices by allowing information to be stored in servers elsewhere. The year 2013 is likely to see many advancements and opportunities as the technology continues to progress. Here are just a few predictions for the upcoming year.

It is likely that the different technologies and functions will consolidate
The quick rise and diversification of cloud technology has led to a wide range of types of cloud services and related platform as a service (PaaS) technology. The year 2013 and subsequent years are likely to see a convergence of the different technologies to a more user friendly system combined with a consolidation of various cloud technologies. This would enable users to use more of cloud technology brokerage models, which can serve for a variety of functions.

Sunday, January 20, 2013

HP Envy 23-d060qd TouchSmart Review

While this all-in-one desktop model might not have the easiest name to memorize, it certainly makes up for it with cutting-edge features. The HP Envy 23-d060qd is the latest in touchscreen desktop exploration.
Coming with Windows 8, the touchscreen feature allows you to enjoy clicking on the tiles that the new OS has made so popular.
Here’s a quick rundown of why you should consider spending $1600+ on this desktop.
The Screen
The 23-inch touchscreen display is perfect for online browsing, Blu-Ray movies and gaming, as well. It’s not always that you get a screen that can handle all of the three with aplomb.
The 1080p full HD screen has a brilliant resolution of 1920x1080. This makes images and videos a joy to witness on this HP model. The screen is extremely responsive, thanks to the 10 finger capacitive feature.
To top it off, the edge to edge glass finish gives the desktop a classy look. With a firm stand, touchscreen activity doesn’t result in too much shaking of the display.
Performance
With a DDR3 RAM of 12 GB, which can be upgraded to 16 GB, this desktop should handle all your entertainment and work needs quite easily.
Storage isn’t a problem as you have tons of it with the 3TB SATA hard drive that runs at 7,200rpm. This is a huge boost and something heavy duty users will find reassuring.
The powerful Intel Core i7 -3770S processor ensures that machine sluggishness is a thing of the past. Smooth operation is all you will get while using the HP Envy 23-d060qd.
Let’s not forget the graphics card that is an NVIDIA GeForce GT 630M. This allows you to have a mind-blowing entertainment experience. Gamers too will find this card up their expectations when loading heavy duty titles.