Tags » Sysctl

Tuning TCP Application Performance

There are some good articles online about overriding the default Linux TCP receive and send window buffer sizes; but I want to extend this topic into more in depth analysis. 634 more words

Linux Ubuntu

Runtime configuring printk - stop kernel printk from flooding the console

Sometimes while debugging kernel/module, unnecessary kernel messages keeps flooding console such that you are not able to have access of console in useful manner to check output of a command or do some task. 232 more words


Changing the server hostname permanently

Yes, Changing the Server hostname. How to do it?

Is it by using hostname command?
sms@test ~]# hostname server.hostname.com

Do you think this will change the hostname permanently? 192 more words


Note for sysctl interface in Linux

It is easy to access sysctl variables in shell script. To set the value of sysctl variable in C code, you can do it like a file access. 60 more words

Study Notes

OpenBSD | isakmpd


net.inet.esp.enable=1 # Enable the ESP IPsec protocol
net.inet.ah.enable=1 # Enable the AH IPsec protocol
net.inet.ip.forwarding=1 # Enable IP forwarding for the host.
net.inet.ipcomp.enable=1 # Optional: compress IP datagrams… 15 more words


Configuring the Kernel with Sysctl


View parameters:

$sudo sysctl -a

Example change that is not persistant.

$sudo sysctl -w net.ipv4.tcp_timestamps=1


To make a persistant change.

$sudo vi /etc/sysctl.conf…

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Customizing Eucalyptus Load Balancer for Eucalyptus 4.0


For the Elastic Load Balancing service, Eucalyptus utilizes an HAProxy instance.  The load balancer image contains the following version of haproxy (as of Eucalyptus 4.0.0): 1,800 more words

Private Cloud Computing