In computer networking and computer science, bandwidth, network bandwidth, data bandwidth, or digital bandwidth is a measure of available or consumed data communication resources expressed in bits/second or multiples of it (kilobits/s, megabits/s etc.).

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38 views

What to do when an open source tool requires massive bandwidth?

I've written a real-time socket API that communicates with a data provider and emits data models to connections subscribed to model events. Imagine the provider is StackExchange and the model is a ...
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20 views

RTMP load-balancing via HAProxy

I've got a little problem to solve: I need to find a way to load balance, bandwidth-wise, the incoming RTMP streams on my servers. I have 2 RTMP servers (nginx-rtmp), let's call them S1 and S2. The ...
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16 views

Bandwidth Policing on Linux gateway - not QoS

I have a linux server providing NAT to a large subnet (/16) using iptables to-destination + multiple external ip's to survive port exhaustion. I've looked at using tc / htb such as here Limiting ...
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35 views

How to troubleshoot network bandwidth limitation

Using a dedicated server with 3gbps connection streaming, server crashes at 1Gbps. Pings go from 20ms to 100-500ms, server is slow or unresponsive, streams start buffering or drop. dmesg |grep eth0 [ ...
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1answer
35 views

GPO limited by system version (Windows Server 2012)?

Windows Server 2012 I want to enable this local GPO: Where it says "Supported on: Windows 7 or computers with BITS 3.5 installed" got me confused, because Windows Server 2012 has BITS 7.6 ...
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2answers
199 views

raid controller data transfer rate

I'm going to buy an 8-port raid controller for which the declared data trasfer rate is "Up to 6Gb/s per port". The declared connectors are "Two mini-SAS SFF8088". The maximum number of supported ...
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9 views

turn server hardware configuration [duplicate]

I want to deploy TURN server on CentOS 6.0 which can handle 5000 audio video connections at a time. Can any buddy give me minimum hardware requirement for it? Specifically number of CPU, RAM and ...
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1answer
41 views

Locating bandwidth bottleneck

I am using FFMPEG to encode a video stream that is sent to a server at EC2 through ELB. I was only able to get about 2Mbps/15fps throughput to the EC2 instance. Through process of elimination, I ...
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49 views

How to limit bandwidth from inside OpenVZ container without tc?

As the title says I would like to know if it is possible to limit bandwidth (download and upload) of OpenVZ container (from inside it) without use of tc or any additional kernel driver (VPS provider ...
0
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1answer
59 views

What's the catch for unlimited bandwidth for VPS? [closed]

I need to choose some VPS packages, so I started to google a lot of VPS companies. Typically, a VPS package should have a limited bandwidth(or say traffic, data transfer), such as 2TB, 3TB, etc. Then ...
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1answer
81 views

Squid delay pools delay_parameters bandwidth

I can not understand the documentation about delay_parameters params in squid. delay_pools 1 delay_class 1 4 delay_parameters 1 -1/-1 -1/-1 -1/-1 600/8000 What is the difference between the first ...
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1answer
36 views

Troubleshooting poor point to point (over internet) bandwidth between two machines

My problem started out as poor bandwidth between a 64 bit Win 7 Home OpenVPN server in location A (Northern Europe) and a Win 7 or Linux Client in location B (Southern Europe). Location A has FTTC ...
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1answer
53 views

NFS Server “outbound” bandwidth consumption

I need to understand about something in NFS (Server). Let say i have: Two Different Clouds (One Server on each) One NFS Server One Apache Server (as the NFS Client) with a NFS Mounted Directory ...
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2answers
87 views

Why does a traceroute from one location to another and vice versa show different paths?

I have recently be plagued by low download speeds from my server and was curious, so I ran a traceroute. (I have removed the end IP and the start IP). I achieve a download speed of 220Kb/s when I am ...
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1answer
111 views

Firewall throughput [closed]

I saw on multiple site vendor sites about firewall throughput in 1518/512/64 bytes UDP packet and each result from 1518/512/64 bytes UDP packet is 1xxx/smaler than 1xxx/significantly smaller than ...
0
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1answer
15 views

VMwaree Workstation. Estimate bandwidth between guest and host systems [closed]

How can be measured the bandwidth speed between Windows 8.1 as host OS and Turnkey LAMP (Debian I guess) stack as guest?
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1answer
35 views

How to check the bandwith that is used by each connection on Apache?

I am trying to get stats on how much of a bandwidth each connection uses on Apache? I have Apache 2.4 installed on Windows Server 2008 R2. I would like to know how many users more I can add on my ...
0
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1answer
55 views

Monitor bandwidth consumption for all connected PC over wifi

We have two internet connection connected to individual wifi router (beetel) in our office, lately i am experiencing very slow internet connection or frequent connection drops, when complained to ISP, ...
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2answers
69 views

Individuals able to hit our bandwidth cap… Only a recent phenomenon?

We have a 10Mbps (synchronous) connection with our ISP. Recently we have discovered that if a single user is watching Netflix, or if I run Windows Update on a PC, we will totally saturate that 10Mbps ...
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54 views

Poor memory performance on intel avoton?

I have 12 of these supermicro A1SA2-2750F boards that I'm playing around with in order to compare them to Dell's C5220s but I'm seeing consistent poor memory performance. Just curious if anyone's ...
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1answer
119 views

iptables connlimit: exclude multiple IP addresses

I have currently this IPTABLES command: iptables -A INPUT -s ! 192.168.0.2 -p tcp --syn -m connlimit [...] -j DROP As far as I know, such rule limit some number of connections following various ...
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1answer
8 views

vnstats // stats showing large tx amount

I have installed vnstat 2 days ago; the site got something like 20k+ visits in this time frame. I can read a rx value of 2.16Gb but a tx value of 61.2Gb. Feels like something's going wrong. How ...
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1answer
41 views

Linux Traffic Shaping: ceil rate never reached

My application run on port 8080. I have this iptables command: iptables -A OUTPUT -t mangle -p tcp --sport 8080 -j MARK --set-mark 10 I have also theses TC rules: tc qdisc add dev eth0 root handle ...
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1answer
44 views

How can identify and quantify physical plant (network capacity) in my local area? [closed]

I am interested in identifying physical plant and network capacity in my local area, which happens to be Boston, but could be anywhere. For example, I understand that in Boston there is something ...
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2answers
116 views

How to measure and monitor available network bandwidth without stealing network bandwidth?

Please note that I am not asking for well known usual bandwidth monitoring tools like ntop, iperf, vnstat etc. I would like to measure periodically and reliably the max. available bandwidth of a ...
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2answers
56 views

Is it possible to test throughput without server cooperation?

To measure throughput between two points in a network using iperf, you have to run iperf at one point in server mode. My question is, is there a tool I can use to measure this bandwidth without ...
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78 views

wondershaper doesn't work for redirected traffic

I'm trying to prioritize my network so small packages get through quicker so latency-dependent applications don't get unusable when downloading/watching videos. I want to use one pc(with one nic) ...
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1answer
122 views

rsync using only spare bandwidth?

My scenario: Several rural schools Every school: One linux server Limited bandwidth (shared with all school PCs) Electricity not guaranteed (last to leave the school could cut all electricity) ...
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213 views

Mac OS X > pfctl > How to limit Bandwidth for a specific port?

I need to limit the Bandwidth of our Apache Server (which runs on port 80 by default). It was easy with ipfw as follows: sudo ipfw pipe 1 config bw 100Kbytes/s sudo ipfw add 1 pipe 1 src-port 80 ...
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2answers
1k views

When reading SSD drive specs, what's the difference between MB/s and IOPS?

I'm trying to find a suitable SSD drive for my database server (postgres on debian 7 amd-64), and I find that for some SSD drives, while read speed is specified in MB/s, write speed is in IOPS. To ...
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4answers
366 views

Simulate slow connection between two ubuntu server machines

I want to simulate the following scenario: given that I have 4 ubuntu server machines A,B,C and D. I want to reduce the network bandwidth by 20% between machine A and machine C and 10% between A and ...
4
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1answer
108 views

psping to localhost - improve throughput

I'm using following psping command to measure the bandwith throughput for localhost on a physical server psping -4 -b -l 8k -n 20000 localhost:1234 The throughput is around 150MB/s wich isn't all ...
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1answer
33 views

Keep showing old processes in nethogs

Nethogs stops showing idle processes after a while. How can I make it keep showing them? I want to have a complete history of processes for long time. Is there any alternative to nethogs?
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1answer
94 views

AWS per connection download limit

I want to spawn a redis slave in AWS (Sydney), which needs ~20Mbit/s to catch up on the writes of the master located in germany. Problem: I get only 8Mbit/s (1MB/s). Tried bigger instance types ...
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2answers
125 views

Multilayer LACP

I have a network switch that is limited to 2x1Gb/s LACP teaming, however have a file server with a 4x1Gb/s network interface. What options do I have to aggregate all available bandwidth without ...
2
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0answers
85 views

How to monitor the bandwidth per each iptables masqueraded device [closed]

Question: Which tool could I use to monitor and break-down in real-time which bandwidth is routed by iptables to which computers? Context: I have a linux box masquerading about 15 devices to ...
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48 views

Windows Server 2008 consuming a lot of bandwidth

My Windows Server 2008 has been consuming A LOT of bandwidth in the last days (990 GB). This is a development server so it should not consume more than 100mb aprox. We noticed this after the server ...
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1answer
142 views

Apache2 Mod CBAND what happens if the limit is reached?

I setup an Apache2 server with the mod_cband to limit download speed at 512kb/s, and I was wondering what happens if I reach the limit. For example, if my server connection is 100Mb/s, I would ...
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2answers
53 views

How much traffic does a Ubuntu server cause for updates? [closed]

Does anybody have some numbers on how much traffic/month a ubuntu server causes if automatic updates are enabled (just for fetching the apt sources and the packages)? I have a small box which is ...
0
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0answers
19 views

Sonicwall 250m bandwidth

We have an nsa 250m with the SonicOS Enhanced 5.9.0.2-107o version. Is there a way to manage bandwidth by group ? I'm already able to do this this by user with this method Firewalls => Access rules ...
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1answer
65 views

Monitor bandwidth per directory [closed]

I have uploads directory and I would like to count the total downloads of files in that directory, in short, is it possible to monitor the consumed bandwidth per directory?
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78 views

Web server losing bandwidth for 6 hours a day

For the past week or so our CentOS server (that runs Apache and NGIX as a proxy) has been acting odd as its bandwidth output has been consistently dropping from around 10/11pm until 4am to around 1M ...
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3answers
564 views

What network performance is required for thin clients?

I am building a network with approx. 1000 thin clients. I intend to run them over VNC. What type of LAN bandwidth and latency are required? What type of hardware will provide that? If, instead of ...
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1answer
221 views

How Do I Limit Bandwidth For Connections On My Ubuntu VPS?

I have a VPS with Ubuntu 12.04 installed, with a 35Gb limit each month (any more than that used and I have to pay). I normally use it with Zpanel to host a Joomla website, and keep the mail ports ...
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2answers
82 views

Huge Outgoing traffic on windwos azure [closed]

I have a vm on Windows Azure running centos6 as dev node, and have recently experiencing a huge increase in outgoing traffic. VM was stopped and after started by 1 day it shows 236.63 GB on outgoing ...
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37 views

Web Hosting Bandwidth

The company that hosts my web servers mentions a 2mb/s dedicated bandwidth with a burst of up to 5mb/s using the 95th percentile ( Burstable ) billing. To me that sounds slow but I know nothing about ...
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78 views

Reduce Bandwidth on a cisco router (Cisco 877)

PS:Sorry for my english i'm french so i'll try to write the best as I can. I looking since a few weeks now for a command to reduce the bandwidth on a cisco router. I done try a lot off command and ...
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182 views

Monitor traffic on ports with Cacti

This seems like a basic question, but i haven't found any solution yet. Recently I've installed Cacti for interface traffic monitoring. That works fine, but I would like to see these graphs for used ...
10
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1answer
1k views

FreeBSD link aggregation no faster than single link

We put a 4 port Intel I340-T4 NIC in a FreeBSD 9.3 server1 and configured it for link aggregation in LACP mode in an attempt to decrease the time it takes to mirror 8 to 16 TiB of data from a master ...
0
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1answer
478 views

Extremely high bandwidth usage on Amazon EC2 instance

I have a m3.medium instance on Amazon EC2. Things are under development and my usual bandwidth usage is no more than 200 to 300 MB per day. I just noticed a spike in my EC2 bill and found out that I ...