bandwidth

问题 Can we find the internet bandwidth from the time it takes to ping a server if yes how is it done 回答1: No, ping tells you nothing about the bandwidth, it just measures latency. Measuring bandwidth is best done by a dedicated test, i.e. transferring a bunch of bits and measuring how long time it takes. You might want to consider that the bandwidth can vary dramatically with many factors, such as: Direction; A to B might be faster than B to A, or vice versa Time of day; depending on general load

问题 Can we find the internet bandwidth from the time it takes to ping a server if yes how is it done 回答1: No, ping tells you nothing about the bandwidth, it just measures latency. Measuring bandwidth is best done by a dedicated test, i.e. transferring a bunch of bits and measuring how long time it takes. You might want to consider that the bandwidth can vary dramatically with many factors, such as: Direction; A to B might be faster than B to A, or vice versa Time of day; depending on general load

问题 I need to calculate AWS Bandwidth usage for an year , from the account activity i cannot see Data transfer option to get the statistics , How can it get it done ? 回答1: Click on your account name in the top right of the AWS console. Choose Billing & Cost Management , Reports , AWS Usage Reports and you can download metrics for almost anything. You probably want to choose: Service: Amazon Elastic Compute Cloud Usage Type: DataTransfer-Out-Bytes You can then download detailed stats in XML or CSV

问题 I want to know if there is an efficient solution to monitor a process resource consumption (cpu, memory, network bandwidth) in Linux. I want to write a daemon in C++ that does this monitoring for some given PIDs. From what I know, the classic solution is to periodically read the information from /proc, but this doesn't seem the most efficient way (it involves many system calls). For example to monitor the memory usage every second for 50 processes, I have to open, read and close 50 files

问题 How can I get Windows data like CPU usage, physical memory, and network utilization and bandwidth, similar to what I see in Task Manager? I'm using C++. 回答1: You can get CPU usage using the performance data. If you want data for only one (or a few processes) it may be simpler to call GetProcessTimes every few seconds. It's generally difficult to pin down exactly what physical memory usage even means. Until you do, trying to describe how to measure it is pretty pointless. You can get some

问题 What is the best way to reduce the size of the viewstate hidden field in JSF? I have noticed that my view state is approximately 40k this goes down to the client and back to the server on every request and response espically coming to the server this is a significant slowdown for the user. My Environment JSF 1.2, MyFaces, Tomcat, Tomahawk, RichFaces 回答1: Have you tried setting the state saving to server? This should only send an id to the client, and keep the full state on the server. Simply

问题 I have an application that has a TCP client and a server. I set up the client and server on separate machines. Now I want to measure how much bandwidth is being consumed ( bytes sent and received during a single run of the application). I have discovered that wireshark is one such tool that can help me get this statistic. However, wireshark seems to be GUI dependent. What I wanted was a way to automate the measuring and reporting of this statistic. I dont care about the information about

问题 How do I collect bandwidth usage/utilzation on devices/switches. From what I understand there are systems that do something like this. They seem to all have snmp in common. I am looking for imformation on possibly rolling my own system for collecting this data that will be later used on a web-based front-end. For a real-world but perhaps a bit over complicated example of what I'm talking about take a look at ubersmith de. Most of it will be in a LAMP environment. Thanks. 回答1: On pure SNMP

问题 I'm trying to test an application that uses a database connection. What I would like to do is throttling the bandwith to, say, 1 MBit or such to get a better feeling for the application under realistic conditions. I already use Wireshark to have a look at the communication with the DB and I expected Wireshark to have a feature like that but as it seems there is no way to do something like that. Any suggestions? 回答1: Check out WANem. You can download a bootable ISO that you boot up on any

问题 I want to log the total bytes downloaded and uploaded by my Python script. total_downloaded_bytes = 0 def bandwidth_hook(r, *args, **kwargs): global total_downloaded_bytes total_downloaded_bytes += len(r.content) req = requests.session() req.hooks = {'response': bandwidth_hook} The above code doesn't take into account HTTP compression (if I'm right) and the size of headers. Is there a way to count total uploaded and downloaded bytes from a requests.session? If not, what about a script-wide