How to turn off Facebook’s auto play video feature?

Recently Facebook have included a new auto play video feature which might a be problem to many users as not all countries have good internet speed or the data charges might be very high. This auto video play feature causes many people to load Facebook slower or burns their pocket with high data usage charge. So if you want to disable this feature then just simply follow the following steps. Continue reading “How to turn off Facebook’s auto play video feature?”

WhatsApp’s new privacy setting option.

1920356_560132240760544_2039082291_nAs I said in the earlier post that WhatsApp has made some changes in its privacy settings.

Now with its latest 2.11.175 version they have given some privacy setting options like to show your status, profile picture, last seen to everyone, my contacts (your personal saved contact numbers) or nobody.

You can edit the settings by going to Settings > Account > Privacy.

 

 

 

1924834_560132264093875_51722328_n

The last seen option have saved many boys from their girlfriends who keep asking them why they didn’t reply as they could see their last seen (Joke 😛 ).

At least it has helped me to ignore few annoying people as they couldn’t see now if I have seen their text or not 😉 .

But there is a disadvantage with this feature if you select nobody could see your last seen, and then you also cannot see anyone’s last seen.

1911895_560132214093880_1362486679_n

But the profile picture option has really helped most of the girls from the stalkers who use to stalk on their profile picture without their knowledge.

 

WhatsApp updated its privacy.

whatsapp logoWhatsApp have recently updated its security for profile pictures of the users. As many people use to save numbers of girls just to look into their profile pictures and stalk on them without their knowledge.

So from now stalkers stop stalking around as you cannot see anyone’s profile picture until the person have also saved your number.

So if you  don’t want any particular person to see your profile picture then just delete that number from your contact list after which he/she cannot see your picture but he/she can see your last seen or status and even can still chat with you unless you have blocked that person.

whatsapp ss2

This even works in group, if you are added into some group and you didn’t save the numbers of other group members then they won’t able to see your profile picture.

whatsapp ss

With this feature you can also find out if a person has saved your number or not.

Facebook’s new feature ‘A look back’

Facebook has completed 10 years on Tuesday, 4th Feb 2014. As Facebook is having over 1.23 billion monthly active users, so they have decided to thank their users by introducing a new feature called “A look back” on this 10th anniversary.

A look back2

This feature will show all the highlights from the past 2 years of the user and contains a compilation of most-liked photos, Shared pictures in the form of a video.

A look back

To use this feature just log on to https://www.facebook.com/lookback.

Users can also share the video.

On what platform Facebook is Build? What are the languages & tools used?

Have you ever thought how Facebook is build? On which platform or what are the languages used for coding it?

Well Facebook is written in a variety of  programming languages like C++, Java, Python, and Erlang.

Facebook uses LAMP stack with Memcached.

LAMP

LAMP is a stack of open source software Linux (operating system), Apache HTTP Server, MySQL (database software) and PHP (or sometimes Perl or Python).

In case of Facebook it uses Linux, Apache, MySQL and PHP.

Memcached

It is a distributed memory object caching system.

 

Facebook uses lot of different tools, services and languages for developer’s tool, Infrastructure, etc but we will just focus on its Infrastructure so that it does not become too big topic.

Infrastructure:

Apache Cassandra

It is a storage system for managing structured data and is designed to handle very large size of data across many servers. It’s a perfect platform for mission-critical data and highly available without compromising performance.

Apache Hive

It is a data warehouse system built on top of Hadoop that helps in easy data summarization, adhoc querying and analysis of large datasets stored in Hadoop compatible file systems.

Apache Thrift

It is a software framework for scalable cross-language services development. Thrift supports C++, PHP, Python, Perl, Java, Ruby, Erlang, Haskell, C#, Cocoa, JavaScript, Node.js, Smalltalk, OCaml and Delphi and other languages.

FlashCache

is a general purpose writeback block cache for Linux. It was developed as a loadable Linux kernel module, using the Device Mapper and sits below the filesystem and it allows caching of a drive on another drive. The module was originally written and released by Facebook
Open Compute Project
It is an open hardware project which accelerates the data center and efficient computing infrastructures at the lowest cost.

HipHop for PHP

It is a transformer of PHP source code into C++. It was developed by Facebook to save server resources and was released as open source in 2010. It is useful for those companies which are running very large PHP infrastructures who don’t want to rewrite complex logic within C or C++ and by doing this it helps them to reduce the number of people who are hired to do this work on the company’s entire codebase. It uses G++ to compile it to machine code.

Scribe

Scribe is a server for aggregating log data streamed in real time from a large number of servers from clients. It is designed to be scalable, reliable and extensible without client-side modification, and robust to failure of any specific machine or the network.

Tornado

It is an open source version of scalable, non-blocking web server framework written in Python. It handles thousands of connections at the same time.