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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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How to split a website's traffic into discrete chunks of bandwidth?

I'm running a website, which has several separate services available for users, like file storage, some sort of current financial data analysis download, and, of course, there's the website itself. ...
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1answer
39 views

How can I limit bandwidth on a public network? [closed]

Our workplace has a public network where people often connect with their personal laptops. A sizeable number of users are torrenting which is killing bandwidth for the rest of the network's users. At ...
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34 views

Nginx dynamically limit bandwidth per IP

I'm trying to set up a Nginx web server for serving file downloads. Let's say that my server has the capability to upload at maximum 1Gbps, is there any way I could make Nginx spread the bandwidth ...
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1answer
55 views

Fixing 70% transfer speed slowdown over VPN compared as compared to SSH? (Tested OpenVPN, IPSec/L2TP, OpenSSH, SoftEther)

I'm currently configuring a site-to-site VPN between two VPSes that requires both outgoing and incoming connections. It will be used by a high bandwidth application so I require the maximum amount of ...
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23 views

Reserving bandwidth in order to reduze packet loss rate

Consider a network, in which one Client is sending UDP packets to a remote server and another Client is uploading a file via FTP to a different remote server. These packets are forwarded to the same ...
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1answer
27 views

How to determine if a link is appropriately dimensioned

Consider the following network: Access Point <--> Ethernet (100 Mbit/s) <--> Router 1 Router 1 <--> 50 Mbit/s Point to Point <--> Router 2 Router 2 <--> ...
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1answer
79 views

Is it possible to use powerline adapters behind UPS's? [closed]

Currently i have my router connected in the 1st floor (with some switches), which is also connected with a 1200Mbps (real bandwith is about 600Mbps) powerline adapter. Another powerline adapter is in ...
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1answer
51 views

openvpn optimizations for Low bandwidth (250mb a month)

I am using openwrt lede with a lte stick 250-300mb a month depending on the unit so preferably hitting 250 or lower would be better for the entire system these are the clients the server doesn't have ...
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1answer
23 views

Monitoring - Calculate bandwidth usage of images

Is there a way to find out the bandwidth usage of a certain mime-type on Windows Server? Eg. How much GB of images is my server serving each month?
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1answer
32 views

Limiting network activity on a server

I have a network with couple of servers running Windows Server 2008 R2. I am being ask to find out a way to limit the network activity per actions. So far i couldn't find if it's even of the realm of ...
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1answer
59 views

Bandwidth: How many nodes can a 15Mbps connection serve? [duplicate]

I have looked for an answer but can't seem to find what I'm looking for so thought I'd ask here. We have decided to get a connection from a local ISP offering an upload speed of 15Mbps to serve a ...
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2answers
110 views

What bandwidth values should I set?

Edit 1: I gave the used bandwidth in DigitalOcean and CloudFlare in details. We could assume that other factors (like CPU, memory) remain the same. My question is about to ask the interpretation of ...
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1answer
100 views

Squid bandwidth control with both source and destination

let's say I have three subnets: 192.168.0.0/24 with 100 mbps uplink 192.168.1.0/24 with 100 mbps uplink 192.168.2.0/24 with 500 mbps unlink I need to limit the bandwith against example.com so they ...
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1answer
330 views

memory bandwidth bottle neck

I have a python pandas program. When I run on AWS Ec2 with 8 cores. I got 100% CPU utilization and program finished in 8 minutes. Then if I go 16 cores, I can only get 50% CPU utilization and program ...
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AWS, Bandwidth and SSD

I am using AWS T2.large instance for my rails application which has both API and CMS. I would like to change the instance type as it is consuming more memory. so which instance is suitable for my ...
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0answers
46 views

Mitigate rsync's burstiness

We use rsync as backup on a NFS share we have on our VPN network. The ISP's modem is awful and it stops responding when we ask too much upload bandwidth to it. We have 150Mbps down / 20 Mbps up ...
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176 views

Idle bandwidth usage of SSH connection

What is the idle bandwidth usage of a SSH connection? For example, if I establish a SSH tunnel (i.e. autossh) to a machine via a metered connection, how much bandwidth can I expect to be used on an ...
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0answers
48 views

How to calculate approximate wifi-bandwith when repeater is used?

When reading about repeater usage (without crossband-repeating) it is said that the bandwith is at minimum reduced by 50% because the repeater has to repeat every bit of communication. In principle i ...
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1answer
88 views

Calculate network/ethernet bandwidth usage rate in every 15 seconds [closed]

I would like to create a bash script for my centos server to monitor the bandwidth usage. Like whether eth0 or eth1 is UP, it should monitor the bandwidth rate it sends and receives in every 15 ...
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1answer
113 views

Ability to view SonicWall WAN bandwidth in real time?

We have a SuperMassive 9200 and a 100Mbit circuit, we have PRTG monitoring the connection and will error when it hits 90%, we have times where that happens and its 100% or higher. We have not found a ...
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1answer
92 views

ieprf vs iperf3 metrics does not match

I am not a network expert but I was measuring the network between to physical hosts using iperf and I got different results depending of the version I was using. Server configuration: CPU: ...
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2answers
133 views

Motherboard with 4x1GbE, can I get 4Gbit throughput? [closed]

I'm planning a home NAS/Plex server using Ubuntu/Debian and I've seen this board (Supermicro X11SSH-LN4F-O) with 4 NICs. My home network is a mix of Wifi and LAN. Lan is 1GbE, Wifi is a Linksys ...
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2answers
473 views

Limit rsync bandwidth nfs copy

We're currently forced to limit the backup bandwidth to a nfs disk outside our network (thru VPN) because it fills up the modem cache and we are forced to reboot it to regain connectivity. 0 22 * * *...
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2answers
208 views

Maximum Internet Bandwidth per User [closed]

My question pertains to network bandwidth outside our local LAN. We have a 10Mbps internet connection provided by our ISP. We need to setup a wireless connection and the plan is to add a 54Mbps ...
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1answer
66 views

Why bandwidth between two nodes is slow?

I measure the bandwidth between my server, which is hosted in a data center, and different nodes, mostly as VPS, with iperf. I am finding out that the bandwidth between some VPS and my server is ...
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2answers
187 views

How to measure bandwidth per cpu utilization [closed]

I'm trying to measure efficiency of the networking system and looking for a tool that either allows to limit max bandwidth for each test or, ideally, limit cpu utilization. At the end I need to have ...
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1answer
82 views

Total Bandwidth Usage tracking in VMWare

In VMWare vSphere, how can I set and track the monthly bandwidth usage of each guest? I need to reduce the network speed when bandwidth usage exceeds 90% or so. What are my options?
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Understanding clients-server max-concurrent-connections and TIME_WAIT state

I know there are a lot of questions and also answers around the TIME_WAIT state of a socket connection, but somehow non of them (or maybe from an experts perspective all of them) help me to understand ...
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0answers
101 views

What is best practice design for internal traffic between microservices?

I have two PHP written microservices A & B. Endpoints are a.example.com and b.example.com. Both services need to be public accessible. In addition, service B makes a lot of curl requests to a....
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1answer
201 views

How to improve bandwidth performance for a vm [closed]

I have been told to add additional nics to the VM to improve bandwidth performance. Once they are added what is the best way to team them together for best performance? I tried the Microsoft bridge ...
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0answers
40 views

Total internet data usage in a small network

We have got a small network with 20-30 Windows systems that is connected through a Fortinet Fortigate Firewall with an LTE Internet Connection that has the speed of 20 Mbps. Basically, my question ...
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1answer
41 views

Grouping multiple internet lines [closed]

I have a multiple internet lines each with a different speed. I want to Grouping them to be like a on line with all of them speed. I hear about loadbalancer, it could be possible?
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10answers
7k views

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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0answers
61 views

95%-ile calculations : Can I use “unused bandwidth” for external backups?

My datacenter is charging me Mbits with 95 percentile calculations. I usually pay for 90mbits every month because of traffic spikes that I have every morning. Those traffic spikes are somewhere ...
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1answer
202 views

What is limiting bandwidth using rsync

we are running a 10Gbit server. Testing whith iperf works perfect: [ 3] 0.0-10.0 sec 10.6 GBytes 9.15 Gbits/sec But when using rsync (with ssh on another port: rsync -Pe 'ssh -p xxx') the ...
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0answers
44 views

Testing CloudFront in Europe

I'm trying to set up CloudFront so that European users can download from my S3 bucket quickly. I've already set it up and am now testing. To test, I have created a Windows EC2 instance and based it ...
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1answer
624 views

Proxmox Virtual Machine Bandwidth monitoring

I have been trying to find some tool to allow me to monitor and get stats from virtual machine network usage. I have a proxmox host with several virtual machines, and I would like to have some sort ...
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2answers
534 views

How to determine what's causing high bandwidth usage on server

I have a MySQL database server running on a VPS. The server is connected to a web server via a private network interface, and has no public services except SSH and a PHPMyAdmin installation. Some ...
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1answer
61 views

How to check if ISP has enough bandwidth for video streaming? [closed]

I have 20Mbps ethernet connection. I connect through dhcp, I have static address on the LAN. I know that 20Mbps should be enough to stream video from sites like youtube: 3 Mbps – Standard Definition ...
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0answers
306 views

iperf3 Windows bandwidth is much lower than linux

I have encountered a very strange issue. I have 2 servers, one runs redhat Linux server 7 64Bit, ahother runs Windows server 2012 64Bit. Both server hardware spec is exactly same: Xeon 2.6Ghz CPU x 2,...
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2answers
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Server bandwidth is going crazy, after reboot all ok

I have a streaming server with 10gbps card on it. I'm using ~2.5gbps. My server is running perfect for 8-9 hours / day, and after that is going crazy, and everyone is freezing. At exactly the same ...
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2answers
464 views

OpenNebula (KVM) + OpenvSwitch, high CPU load on high bandwidth use

We are running an OpenNebula 5.0.2 environment on Ubuntu 16.04, using OpenvSwitch 2.5 for bridging the virtual interfaces and LACP trunking the two Gbit ports, which is working perfectly. But when I ...
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1answer
1k views

Streaming bandwidth limitations Amazon S3 + CloudFront

I've been looking into using the Amazon Elastic Transcoder to implement a on-demand videostreaming scenario for quite some time now. The variables around the transcoding cost and restrictions are ...
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2answers
291 views

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 hardening I ...
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2answers
1k views

Where is the response size in Squid's access.log?

I need to make a program that logs bandwidth usage per-user of a squid proxy. In my access.log I see output such as... 1481377143.042 0 104.123.25.183 TCP_DENIED/407 3829 CONNECT scontent.xx....
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1answer
119 views

Can linux or vsftpd refused connection if client bandwidth is too lower

I have an ftp server to which my clients connect quietly in the morning, but the afternoon the connection is refused (not all, but only one of of them), while the clients using http normally works. ...
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1answer
447 views

How much bandwidth is used by a connection that is load-balanced with nginx?

I have 3 servers, each one having 100mbps. The first server has an nginx load balancer, configured like this: http { upstream myproject { server 127.0.0.1:8000 weight=3; server 127.0.0.1:...
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2answers
47 views

Bandwidh usage from 1 ip

I check realtime bandwidth in my server with nload command so i get upload / download in mbps But is there a way to check bandwidth from 1 ip Example ill check how much bandwidth is going to 111....
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1answer
139 views

Throughput issue in Server 2012 R2

elders of t3h interwebz! i seek your wisdom for a rather strange matter... i am working on a case: a small network involving a Window Server 2012 R2 machine configured as a router, RADIUS server for ...
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1answer
116 views

Does htaccess redirect to another domain still affect the original website's bandwidth?

I have a domain (let's call it one.com) that contains: A website A MySQL DB + a REST API service written in PHP to access the data The API service is used by a mobile platform that calls it through ...