Friday, August 29, 2008

Tweak and maximize your bandwidth in Ubuntu/Linux via sysctl :

Here I will unleash a few hidden settings that should improve your internet speed, and work with all current linux operating systems including Ubuntu:

1. Open a Terminal via Applications->Accessories->Terminal

Type:

    sudo vim /etc/sysctl.conf    (press i for edit mode)

Then Paste the Following at the end of the file:

 ## increase TCP max buffer size setable using setsockopt()
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
## increase Linux autotuning TCP buffer limits
## min, default, and max number of bytes to use
## set max to at least 4MB, or higher if you use very high BDP paths
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65536 16777216
## don't cache ssthresh from previous connection
net.ipv4.tcp_no_metrics_save = 1
net.ipv4.tcp_moderate_rcvbuf = 1
## recommended to increase this for 1000 BT or higher
net.core.netdev_max_backlog = 2500
## for 10 GigE, use this, uncomment below
## net.core.netdev_max_backlog = 30000
## Turn off timestamps if you're on a gigabit or very busy network
## Having it off is one less thing the IP stack needs to work on
## net.ipv4.tcp_timestamps = 0
## disable tcp selective acknowledgements.
net.ipv4.tcp_sack = 0
##enable window scaling
net.ipv4.tcp_window_scaling = 1


Type :wq to exit and save.

Type in terminal

    sudo sysctl -p

to apply the settings.


You can disable all these settings by removing these lines you added via:

    sudo gedit /etc/sysctl.conf



Hey Guyz This really works.....If you don't believe ....Than check it out...And at last ...This facility is
only available at linux..haha...well Add on to my post: Check your Internet Speed
http://resources.zdnet.co.uk/speedtest/ ---->>>> start test....And know your speed..where it stands...

Swap....Does It matter??

Hey Guyz and Galz...
Lemme Clear a Doubt ( ->>Swap<<-) I installed Ubuntu 8.04 LTS Desktop Edition (64 bit) recently.Following Is my system configuration:- Intel C2D 1.67 GHZ Processor 2 GB DDR2 RAM NVIDIA graphics geforce 8400 GS Rest blah blah... Actually I had a challenge to clear my HDD and make a partition in EXT3 file format system.So I shifted few GBs to Win-drive ,few to pen and few to my fren's HARDY...newayz ...Partition was created.But Initially i had Myths of installing Open OS's is like 1>Swap is must..
2>partition shd be atleast 20 GB for linux etc..

Myth 1:But lemme tell you folks..F* the Swap.......and Juss install ubuntu without the Swap.....nothing gonna happen.Hmm....May be that could matter abt 0.01% or something.plzzzz don't waste your HDDs s in such craps.

If you have a gud configuration (basically Ram processor tuning) than neglect this swap..and if a RAM below 1 GB than you may go for SWAP.for a virtual memory allocation,and to be on the safe side.Coz we techies cant compromise with speed..speed is must...isnt it???????newayz..

Myth 2:Space of 20 GB ..dats of bakwaas...actually it depends.....How many extra packages,softies you wish to install in your Operating system.Check the following table for reference:-

i) If you are a developer : Prefer Linux ext3 partition >10 GBs. coz extra pakages needed to be installed for softwares for JAVA SDK,Python ,Ruby on rails .....nd Latest SDKs.
ii)if you are a muzik /+ movie Freak: 10 GBs>Go for Linux ext3 partition>5 GBs ...Coz minimal pakages inc. VLC and other places will do.
iii)If you are a gaming freak: go for allocating abt 20 GBs for minimum..Reason u must b knowing ...
iv)Others ...consult me...

Well At last keep checking my blog........Loads more to come......nd plz post your comments.
Thanks for reading patiently...
Nikk Signin off....