03-09-2001
Add more RAM, increase your network bandwidth, upgrade the CPU.
10 More Discussions You Might Find Interesting
1. HP-UX
Background;
FTP-ing a small 210K file to a HP7410 attached to a EVA500 the averaging speed 400KB/s
FTP-ing a small 210K file to a K570 the average speed is 4500KB/s
FTP-ing a 31MB file to a HP7410 attached to a EVA 5000 the average speed is 5500KB/s
FTP-ing a 31MB file to a K570 the average... (3 Replies)
Discussion started by: ottof
3 Replies
2. UNIX for Dummies Questions & Answers
Hi,
Is mv (move) command quicker than cp (copy command)?
I have large files and I want to know if mv actually copy the data to a new file then deletes the old or whether it just alters information the file system without physically moving data - Unfortuanately I don't have large files to test... (2 Replies)
Discussion started by: GMMike
2 Replies
3. Filesystems, Disks and Memory
Hello,
I have a Supermicro server with a P4SCI mother board running Debian Sarge 3.1. This is the "dmidecode" output related to RAM info:
RAM speed information is incomplete.. "Current Speed: Unknown", is there anyway/soft to get the speed of installed RAM modules? thanks!!
Regards :)... (0 Replies)
Discussion started by: Santi
0 Replies
4. Shell Programming and Scripting
How would one go about optimizing this current .sh program so it works at a more minimal time. Such as is there a better way to count what I need than what I have done or better way to match patterns in the file? Thanks,
#declare variables to be used.
help=-1
count=0
JanCount=0
FebCount=0... (3 Replies)
Discussion started by: switch
3 Replies
5. Shell Programming and Scripting
Hi
I need a command to know how many processors are available and what is their speed in UNIX.
Thanks (2 Replies)
Discussion started by: diksha2207
2 Replies
6. Filesystems, Disks and Memory
I analysed disk performance with blktrace and get some data:
read:
8,3 4 2141 2.882115217 3342 Q R 195732187 + 32
8,3 4 2142 2.882116411 3342 G R 195732187 + 32
8,3 4 2144 2.882117647 3342 I R 195732187 + 32
8,3 4 2145 ... (1 Reply)
Discussion started by: W.C.C
1 Replies
7. Shell Programming and Scripting
Hi,
Im quite new to scripting and would like a bit of assistance with trying to speed up the following script. At the moment it is quite slow....
Any way to improve it?
total=111120
while
do
total=`expr $total + 1`
INCREMENT=$total
firstline = "blablabla"
secondline = "blablabla"... (5 Replies)
Discussion started by: brunlea
5 Replies
8. Programming
Which one is faster among malloc and new?
My understanding is that since new also has to call constructors after allocating memory it must be slower than malloc.
Am I correct? (1 Reply)
Discussion started by: rupeshkp728
1 Replies
9. Shell Programming and Scripting
Hi,
I have to grep string from 20 - 30 files each carries 200 - 300 MB size and append to the
file. How to speed the
grepping time.
cat catalina.out_2012_01_01 | grep "xxxxx" >> backup.txt
PLZ, Suggest me,
Regards,
Nanthagopal A (5 Replies)
Discussion started by: nanthagopal
5 Replies
10. Shell Programming and Scripting
hey guys i have a perl script wich use to compare hashes but it tookes a long time to do that so i wich i will have the soulition to do it soo fast
he is the code
<redacted> (1 Reply)
Discussion started by: benga
1 Replies
LEARN ABOUT DEBIAN
dummynet
DUMMYNET(4) BSD Kernel Interfaces Manual DUMMYNET(4)
NAME
dummynet -- traffic shaper, bandwidth manager and delay emulator
DESCRIPTION
The dummynet system facility permits the control of traffic going through the various network interfaces, by applying bandwidth and queue
size limitations, implementing different scheduling and queue management policies, and emulating delays and losses.
The user interface for dummynet is implemented by the ipfw(8) utility, so please refer to the ipfw(8) manpage for a complete description of
the dummynet capabilities and how to use it.
Kernel Options
The following options in the kernel configuration file are related to dummynet operation:
IPFIREWALL enable ipfirewall (required for dummynet)
IPFIREWALL_VERBOSE enable firewall output
IPFIREWALL_VERBOSE_LIMIT limit firewall output
DUMMYNET enable dummynet operation
HZ set the timer granularity
Generally, the following options are required:
options IPFIREWALL
options DUMMYNET
options HZ=1000 # strongly recommended
Additionally, one may want to increase the number of mbuf clusters (used to store network packets) according to the sum of the bandwidth-
delay products and queue sizes of all configured pipes.
SEE ALSO
setsockopt(2), if_bridge(4), ip(4), ipfw(8), sysctl(8)
HISTORY
The dummynet facility was initially implemented as a testing tool for TCP congestion control by Luigi Rizzo <luigi@iet.unipi.it>, as
described on ACM Computer Communication Review, Jan.97 issue. Later it has been modified to work at the IP and bridging levels, integrated
with the ipfw(4) packet filter, and extended to support multiple queueing and scheduling policies.
BSD
October 28, 2002 BSD