Sponsored Content
Top Forums UNIX for Advanced & Expert Users Looking for a Low-Latency TCP Congestion Avoidance Algorithm Post 302552369 by jjinno on Friday 2nd of September 2011 03:05:49 PM
Old 09-02-2011
What are you referring to as the default?
Running Kernel 2.6.8 to 2.6.18 the "default" appears to be BIC:
Quote:
BIC is used by default in Linux kernels 2.6.8 through 2.6.18.
In 2.6.19, the default changed to CUBIC:
Quote:
CUBIC is used by default in Linux kernels since version 2.6.19
However, BIC & CUBIC (just a variation on BIC) state that they are:
Quote:
an implementation of TCP with an optimized congestion control algorithm for high speed networks with high latency
So what default are you referring to?
 

7 More Discussions You Might Find Interesting

1. IP Networking

When should TCP congestion avoidance be used?

I have a Cisco small business switch and I am wondering what I will gain (or lose) by enabling "TCP congestion avoidance". I read the definition of it but how does one know when one should use it? (0 Replies)
Discussion started by: herot
0 Replies

2. IP Networking

TCP initial congestion window (slow-start)

I have noticed that the initial congestion window in my traces is 8920bytes~=6*1448. rfc3390 states the initial cwand should be max 4000 bytes(around 3*1448). At first i thought it might be because i'm running my server on mac os x, so apple might have modified the tcp stack. Therefore I tried... (2 Replies)
Discussion started by: ddayan
2 Replies

3. AIX

High Runqueue (R) LOW CPU LOW I/O Low Network Low memory usage

Hello All I have a system running AIX 61 shared uncapped partition (with 11 physical processors, 24 Virtual 72GB of Memory) . The output from NMON, vmstat show a high run queue (60+) for continous periods of time intervals, but NO paging, relatively low I/o (6000) , CPU % is 40, Low network.... (9 Replies)
Discussion started by: IL-Malti
9 Replies

4. Solaris

Change congestion protocol in Solaris 10

I have a client with a meshed Cisco backbone. 6500's on top, Nexus 7000 in the middle and 4500's in bottom. Solaris 10 servers connected to the 4500's backing up to a RedHat Linux backup server connected to the Nexus 7000's. The traffic is routed from 4500 --> Nexus 7000 --> 6500 --> Nexus 7000... (3 Replies)
Discussion started by: crusoe
3 Replies

5. AIX

Latency Test

Hi every one, we have a set up in solaris 8 and 9 and running many cshell scripts.. we are migrate to AIX . Now, i want to know the latency difference between two boxes(Solaris and AIX). Kindly help me to , how to do Latency test.. (0 Replies)
Discussion started by: Madhu Siddula
0 Replies

6. Solaris

Latency Test

Hi every one, we have a set up in solaris 8 and 9 and running many cshell scripts.. we are migrate to AIX . Now, i want to know the latency difference between two boxes(Solaris and AIX). Kindly help me to , how to do Latency test.. (2 Replies)
Discussion started by: Madhu Siddula
2 Replies

7. Solaris

Too much TCP retransmitted and TCP duplicate on server Oracle Solaris 10

I have problem with oracle solaris 10 running on oracle sparc T4-2 server. Os information: 5.10 Generic_150400-03 sun4v sparc sun4v Output from tcpstat.d script TCP bytes: out outRetrans in inDup inUnorder 6833763 7300 98884 0... (2 Replies)
Discussion started by: insatiable1610
2 Replies
httppower(8)							     powerman							      httppower(8)

NAME
httppower - communicate with HTTP based power distribution units SYNOPSIS
httppower [--url URL] DESCRIPTION
httppower is a helper program for powerman which enables it to communicate with HTTP based power distribution units. It is run interac- tively by the powerman daemon. OPTIONS
-u, --url URL Set the base URL. INTERACTIVE COMMANDS
The following commands are accepted at the httppower> prompt: auth user:pass Authenticate to the base URL with specified user and password, using ``basic'' HTTP authentication which sends the user and password over the network in plain text. seturl URL Set the base URL. Overrides the command line option. get [URL-suffix] Send an HTTP GET to the base URL with the optional URL-suffix appended. post [URL-suffix] key=val[&key=val]... Send an HTTP POST to the base URL with the optional URL-suffix appended, and key-value pairs as argument. FILES
/usr/sbin/httppower /etc/powerman/powerman.conf ORIGIN
PowerMan was originally developed by Andrew Uselton on LLNL's Linux clusters. This software is open source and distributed under the terms of the GNU GPL. SEE ALSO
powerman(1), powermand(8), httppower(8), plmpower(8), vpcd(8), powerman.conf(5), powerman.dev(5), powerman-devices(7). http://sourceforge.net/projects/powerman powerman-2.3.5 2009-02-09 httppower(8)
All times are GMT -4. The time now is 08:43 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy