Category: Technology

I work in technology sector. And I do round a clock, not only from 9 to 5. It is my bread and butter, it is my hobby, it is the fascination of my life. And with the current rate of change particular in information technology (IT), there is always something new to learn, to try, to talk about. I often post news, thoughts, and reviews. And when I do, this is the category I use.

Monitoring tree of Linux processes

Once in a while there is a need to see the tree of processes on a Linux system.  When such a need arises, I usually run “ps auxw –forest“, which results in something like this (partial output, top only):

/bin/ps auxw --forest

Today, via this blog post, I’ve learned that there is another way – “pstree“.  This command accepts a number of parameters, but in its simplest form, results in something like this (partial output, top only):

/usr/bin/pstree

On my Fedora box, /usr/bin/pstree is a part of the psmisc RPM, which is the one that brings /usr/bin/killall to the system.

On browser compatibility

Here is a quote for you on browser compatibility from an excellent book Diving Into HTML 5, which is available online.

The last time I tried to count, there were 5 doctypes that triggered “almost standards mode,” and 73 that triggered “quirks mode.” But I probably missed some, and I’m not even going to talk about the crazy shit that Internet Explorer 8 does to switch between its four — four! — different rendering modes. Here’s a flowchart. Kill it. Kill it with fire.

And just in the flowchart link will break anytime soon, here is a copy of the image.

On scalability of MySQL

Anyone who says that MySQL is not scalable has no idea.  Facebook is one of the examples for a large deployment of MySQL:

How big is Facebook’s Internet infrastructure? Facebook VP of Technology Jeff Rothschild provided some details in a panel at the recent MySQL user conference. Rothschild says Facebook is now running 10,000 servers, including 1,800 MySQL servers that are overseen by just two database administrators.

Facebook recently surpassed 500,000,000 users – half a billion!