Questions tagged [bandwidth]
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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Is there a linux terminal command that lets you see the amount of data coming in to your tcp connections in real time?
It would be something similar to top, where you see your cpu processes in real time. I'm not looking for a GUI like Wireshark to do it.
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Bandwidth limits for Amazon EC2
I have a micro instance on Amazon EC2 cloud.
Also the instance is small and it has vary low CPU and EAM usage but it
generates a lot of content, so it can be considered like a web server
serving ...
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how can I limit per user bandwidth?
To summarise:
I have a dedicated server with a few friends running a torrent client with web gui. Each user is running a client under their username on the server so downloads go in their user dir, ...
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Technologies that allow YouTube scale distribution?
Youtube as we know, is massive. It has thousand of concurrent users streaming at least 2 megabytes per video. Obviously, that gets to be a lot of traffic... far too much for any one server.
What ...
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AWS, Bandwidth and content delivery
My question is about Virtual Machines and delivering their content over the servers connection to the internet.
I have an Ec2 windows instance, and its network connection appears to be 100mbps
If I ...
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How can I buy end-user bandwidth for my customers? [closed]
I sell a product to customers, and as part of this product I have a website where customers can upload data for processing. The data is of considerable size (gigabytes).
I am looking to buy extra ...
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How can I see how much bandwidth each Apache Virtual Host is using?
I have Apache set up to serve several Virtual Hosts, and I would like to see how much bandwidth each site uses. I can see how much the entire server uses, but I would like more detailed reports.
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Dynamically blocking excessive HTTP bandwidth use?
We were a little surprised to see this on our Cacti graphs for June 4 web traffic:
We ran Log Parser on our IIS logs and it turns out this was a perfect storm of Yahoo and Google bots indexing us.. ...
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Connecting two desktop switches with more than one cable?
I was hoping to find a way to increase bandwidth between two desktop switches I have, and I wondered if connecting them with two cables (or perhaps three) instead of just one might increase ...
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What is the best way to transfer a single large file over a high-speed, high-latency WAN link?
This looks related to this one, but it's somewhat different.
There is this WAN link between two company sites, and we need to transfer a single very large file (Oracle dump, ~160 GB).
We've got full ...
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Network Traffic Monitoring
What is the best tool to monitor/analyze network traffic on an entire network (several subnets)?
I'm looking for something that will help me toubleshoot bandwidth problems when, for instance, users ...
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How to test real network throughput between two points?
What are some of the better tools/utilities for testing real bandwidth across a link? In my case I am testing the real throughput across a wifi bridge.
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Limit incoming and outgoing bandwidth and latency in linux
I realise many similar questions have already been asked, but so far I've yet to find a solution to my problem.
I have a virtual linux server (running Debian Squeeze) that I use for testing of ...
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Who's using our bandwidth?
I can see from our ISP stats that a large amount of bandwidth is being used throughout the day, I suspect it's someone using our wireless router although I'm not definite. Our PC's all run various ...
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What are the different classes of Internet Connection and how do they differ?
I'm looking for the technical differences between consumer and professional Internet connections. By "professional" I mean:
The kind you can get at a datacenter
The kind you can get at an office that ...
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How to Monitor Bandwidth usage in real terms
I have a small (windows) network with a few people on it.
We have internet access via a BT router
Generally things are all fine, but occasionally, we seem to experience a dramatic loss of bandwidth....
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Apache: Limit the Number of Requests/Traffic per IP?
I would like to only allow one IP to use up to, say 1GB, of traffic per day, and if that limit is exceeded, all requests from that IP are then dropped until the next day. However, a more simple ...
Ian Kern
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What does limit performance of scp?
I've two Debian Linux machine connected via 1 Gbit LAN. I can measure this with a raw HTTP file transfer with wget which gets around 100MB/s in either direction.
When I now use scp, the maximum ...
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Rate-limiting incoming traffic
I've never quite understood whether or not it's possible to rate-limit incoming traffic. I realize that there is no direct method whereby to control the remote server's rate of sending packets (unless ...
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Are network switch data transfer speed limits per port or per device?
When network switches report speeds of say 100 Mbit or 1 Gbit, are they referring to the maximum speed per Ethernet port or is this the physical limit of the switch on all ports? Say for example two ...
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Limit SSH traffic?
I would like to be able to limit SSH bandwidth on my server. I.e. each sshd process should be limited to 200Kb/s or something like that.
scp has this functionality, but ssh, being more designed for ...
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Counting bandwidth from a Docker container
I'm trying to figure out how to track bandwidth coming from a Docker container.
Normally I use --uid-owner as mark to keep track of bandwidth usage for a given user. However, even when I run all the ...
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If I send data to my computer using its public hostname, does it actually go over the internet?
To clarify:
I'm using my public hostname to connect to a MySQL database. The hostname resolves to my server's external IP (e.g. 1.2.3.4). Is the data I'm sending/receiving via the MySQL connection ...
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CentOS 6 router/firewall seems to be throttling throughput
TL;DR
CentOS6 NAT router/firewall behind a 120Mbps cable modem connection
seems to be capping throughput at 30Mbps after recent updates and
security "hardening".
Prior to updates and ...
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Opinions on hosting servers in-house
I've read a half-dozen threads here about the pros and cons of hosting in-house, but our situation is a little different than most, so I figured I'd just open a new question.
In short, we're a small ...
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Best way to load balance across multiple static file servers for even an bandwidth distribution?
First off, I'll explain my situation to you. I'm running a fairly popular website as a side project, so I can't really invest a ton of money into it. I currently have just one server with HAProxy in ...
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Network explanation: megabytes or megabits?
I'm getting confused with network terms.
Can you explain to me how I calculate network bandwidth?
When people say 20Gbps does it mean 2.5 G bytes?
I really need to understand what it means when a ...
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How long does it take for an iptables rule to apply?
How long does it take for an iptables rule to apply?
I use a script with the code below in an attempt to block hosts, but they don't appear to take immediately. Is there some delay, is iptables not ...
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Do multiple network connections between switches increase bandwidth?
Say I have 2 identical unmanaged gigabit switches on a network, A and B. There are computers connected to switch A, there are other computers connected to switch B. A and B are connected via 1 cable....
user13328
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How to find process which uses most bandwidth
How can I find the process which uses most bandwidth on a Linux PC?
With iftop it's possible to find which connections produce most bandwidth, but how to find the process?
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Limiting network throughput of an already launched process ? (Linux/FreeBSD)
Is there any utility to limit the network throughput of a process after it has been launched? Simple example: you note that a user takes all your upload bandwidth using scp and you'd like to limit the ...
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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 ...
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Amazon EC2 bandwidth charges in case of unwanted incoming traffic(ddos/flood)?
What happens if my EC2 instance gets ddosed/flooded, which could potentially go up to tens of gigabytes an hour(and even more) of undesired incoming traffic, will i be charged for this traffic?
My ...
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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 B....
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Monitor Internet bandwidth
We have an IPCop firewall/proxy installed in our network, and although I can use iftop to somewhat take a look at how the clients are using the Internet, is it possible to monitor it from outside the ...
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Monitor SSH-traffic per user
We have a backup application that runs once every 12 hours.
Multiple servers, desktops, and laptops connect to an EC2-instance and push a backup via SFTP using their own log-in credentials.
If they ...
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netcat throughput low but iperf high
I was testing the throughput between two pcs, connected on the same router, one with 100mbps lan, the other with 54mbps wifi.
Here is the interesting part:
using nc, I get 2.63MB/s when sending from ...
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How to find the bottleneck while transferring huge files between 2 hosts
We frequently need to transfer huge files (upwards of 50 GB) between two hosts, and the transfer rate never seems to reach the expected throughput for the network. There are several points which could ...
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Slow network speeds - what should I check?
Users are reporting that it's taking a long time to access files on the network, browse intranet sites, etc. What should I check?
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How to start iperf3 server in UDP mode?
I would like to test UDP connectivity with iperf3 but do not know how to start it in UDP server mode.
iperf3 -s only opens a TCP socket:
root@srv ~# lsof -i -P | grep iperf3
iperf3 21030 ...
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Does anyone know the bandwidth available for different EC2 Instances?
Hi I have heard that the small EC2 instances are limited to around 35mbit/s. Does anyone have any figures for the different instance types and the size of their pipes?
We will be planning on using ...
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How to estimate network data transfer volume for a mysql database
When planning to port my application (Java+Tomcat+MySql) to a cloud hosting, I've found that one important factor to consider is the volume of data transferred to/from the database, as it is limited ...
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When downloading two files, why does the second one not suddenly speed up after the first one finishes? [closed]
I have noticed that when I am downloading several files at a time, and one of them finishes, the bandwidth that it was consuming is not immediately apportioned to the others. For example, if I have ...
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Limit VMware Virtual Ethernet bandwidth
I'm looking to simulate a 56KB modem connection in a VMware Workstation virtual machine. I remember reading this was possible, but forgot how?
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How should I manage per-user bandwidth?
Users often run bandwidth intensive applications - peer-to-peer applications, video, etc. Do you monitor and/or cap per-user bandwidth?
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Measure bandwidth usage (GB's transferred) on a linux server
I have a linux email server that I am thinking about moving into "the cloud". After investigating the pricing I see that my major cost is going to be in bandwidth. How would you guys suggest measuring ...
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Monitoring Bandwidth Usage (Per Internal IP) - Cisco ASA 5505
I manage a small network with a Cisco ASA 5505 and a shared DSL connection. I would like to be able monitor the bandwidth usage of the various users/devices on my network (by IP address). Can I do ...
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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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Somebody eating all our bandwidth, what should I do?
OK, this is frustrating, my site got thousands of page views/connections in the last 3 days and finally we ran out of monthly bandwidth. We bought more bandwidth and closed the site for maintenance. ...
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Remote file copy util (like rsync) but that will take account of data already copied (in this session)?
Let's say I have a directory with 2 files, both are identical and quite large (e.g. 2GB ea.) I want to rsync that directory to a remote host. As I understand it (and I could be wrong), rsync ...
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