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Best Linux Distro For Cluster - Page 5

post #41 of 44
Quote:
Originally Posted by zflamewing View Post

That's a really good breakdown of the inner workings of a web farm and a lot of optimization paths. I'd love to have a write up like that to pass along to my peers at work to help understand what we're supporting....I work in an operations center for a .com. would it be possible to use that as such?

Be my guest smile.gif
post #42 of 44
@Plan9

Thank you for that, that was a very good breakdown. smile.gif You're absolutely correct, there are far bigger bottlenecks to worry about, but I remember watching a talk by one of the YouTube guys concerning the tweaking they had to do to the Linux kernel (especially with the swap mechanism) to get it to perform properly under load - this is before they were acquired by Google). Admittedly this was with kernel 2.4, so things may have changed drastically since then. I was really trying to say that in an apples-to-apples scenario, there would be a noticeable difference between say a vanilla kernel and (for example) an RHEL kernel.


@dushan24

Didn't know that. I assumed the Ubuntu Server kernel didn't have stuff compiled in like the graphics and audio drivers and the pre-emptive stuff (which was developed for better desktop responsiveness).
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post #43 of 44
Quote:
Originally Posted by parityboy View Post

@Plan9

Thank you for that, that was a very good breakdown. smile.gif You're absolutely correct, there are far bigger bottlenecks to worry about, but I remember watching a talk by one of the YouTube guys concerning the tweaking they had to do to the Linux kernel (especially with the swap mechanism) to get it to perform properly under load - this is before they were acquired by Google). Admittedly this was with kernel 2.4, so things may have changed drastically since then. I was really trying to say that in an apples-to-apples scenario, there would be a noticeable difference between say a vanilla kernel and (for example) an RHEL kernel.


@dushan24

Didn't know that. I assumed the Ubuntu Server kernel didn't have stuff compiled in like the graphics and audio drivers and the pre-emptive stuff (which was developed for better desktop responsiveness).

gfx modules are separate anyway in most minimal installs of any distro
post #44 of 44
Quote:
Originally Posted by parityboy View Post

@Plan9
Thank you for that, that was a very good breakdown. smile.gif You're absolutely correct, there are far bigger bottlenecks to worry about, but I remember watching a talk by one of the YouTube guys concerning the tweaking they had to do to the Linux kernel (especially with the swap mechanism) to get it to perform properly under load - this is before they were acquired by Google). Admittedly this was with kernel 2.4, so things may have changed drastically since then. I was really trying to say that in an apples-to-apples scenario, there would be a noticeable difference between say a vanilla kernel and (for example) an RHEL kernel.

If you can find that video then I'd be very interested in watching it. I know most of the techniques wouldn't be applicable any more, but there would hopefully be some theory I could still learn from it smile.gif
Quote:
Originally Posted by parityboy View Post

Didn't know that. I assumed the Ubuntu Server kernel didn't have stuff compiled in like the graphics and audio drivers and the pre-emptive stuff (which was developed for better desktop responsiveness).
Graphics and audio drivers wouldn't be compiled into the kernel these days. It's all external kernel objects (.ko). I'm not sure how things work with systemd, but in the days of udev (et al) you could have either the start up daemon auto detect hardware and load the appropriate kernel objects, and/or hardcode which modules to load.
Edited by Plan9 - 11/14/12 at 12:48pm
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