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Search found 1529 results on 62 pages for 'bandwidth'.

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  • How to limit network usage for concrete application in linux that is running in it?

    - by B14D3
    I'm looking for something like nice for cpu, but for network usage that will limit application network consumption to level that will configure. I have problems with xapian-replicate-server that is consuming 80 % of my network. It's causing mysql connections problem (mysql server is working on this machine too). I can't move xapian or mysql to other machine so i need to limit xapian network usage to a decent level. Is there any tool that will help me do this ?

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  • Cache bandwidth per tick for modern CPUs

    - by osgx
    Hello What is a speed of cache accessing for modern CPUs? How many bytes can be read or written from memory every processor clock tick by Intel P4, Core2, Corei7, AMD? Please, answer with both theoretical (width of ld/sd unit with its throughput in uOPs/tick) and practical numbers (even memcpy speed tests, or STREAM benchmark), if any. PS it is question, related to maximal rate of load/store instructions in assembler. There can be theoretical rate of loading (all Instructions Per Tick are widest loads), but processor can give only part of such, a practical limit of loading.

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  • Video streaming and internet browsing on different bands/frequency

    - by user47207
    I have a Netgear WDNR37000 which allows clients on a 2ghz or 5ghz to access the internet and see every client and device on the network. I have a computer with two nics, one that is in the 2ghz range and the other on the 5ghz range. My specific problem is that I would like to serve my video streams (hulu, ps3mediaserver, playon) to my ps3 on the 5ghz band while internet browsing is routed to the 2ghz band. This is so that the video streams aren't affected by general internet use. While the easiest solution would be to disable internet access on the 5ghz apn, I would like to know of a solution that would not require that.

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  • Host data transfer limit calculations and network protocol headers

    - by UpTheCreek
    OK, this might be a really stupid question, but... I'm building a web app that utilises websockets. There's fairly rapid messaging going on, so I've been taking a look at the network traffic with wireshark, to see if there's any way of reducing the amount of data we are sending over the wire, and hence costs. A typical message has approx 150 byte data payload, and according to wireshark the lower layer stuff takes up about: Ethernet: 14 bytes IP: 20 Bytes TCP: 20 Bytes My question is, are these network headers included in data transfer calculations? What about TCP ACK messages? (another 54 bytes according to wireshark) This may seem petty, but because we have so much messaging going on, and because the payload is a similar size to these headers, it's significant.

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  • Is data transfer response related to cable bandwidth limit?

    - by John Paku
    Hello, Before this, I'm using shared 100Mbps bandwidth. Its fast enough. And now, the server running dedicated 10Mbps bandwidth. When running 10Mbps, it takes more time to completely load the same page. The server bandwidth usage is small, with average less than 5Mbps. (I can see some website hosted at same data center loads very fast.)

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  • What kind of website traffic can a 10mpbs connection handle?

    - by Blankman
    I need some help understanding firewalls. I played around with Amazon EC2 and it seems to provide a firewall out-of-the-box. When I say firewall, to me that means the ability to block ports from being accessed from the outside world, or to only specific security groups. I'm looking at a dedicated server hosting provider and they provide a hardware firewall for $50/month and it is limited to 10mbps. Can someone explain to me what kind of traffic this correlates to? Are these usually limited to the number of simultaneous connections also?

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  • How (in terms of which parameters) is a "professional-grade" broadband connection different from a "consumer" one?

    - by odemarken
    By "professional" I mean here: The kind you can get at a datacenter for your server The kind you can get at an office that would be good enough for hosting web and mail server with low to medium traffic. (Please ignore other aspects of "the self-hosting problem" and focus only on broadband connection quality). Another way to frame this question would be "what parameters should office broadband have to compare to a datacenter-provided one for the purposes of self-hosting". The knowledge I have gathered so far is in answer format below.

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  • How much traffic per month would my site need? [closed]

    - by camran
    HOW MANY GB OF TRAFFIC IS REQUIRED PER MONTH? Any way to calculate this? Webhosting companies have a limit when ordering, so I need to know... A classifieds website using PHP and MYSQL. MYSQL has around 500thousand records. Not much graphics. Pretty advanced search feautures. How much traffic would I need do you think? Thanks

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  • vista bandwith reservation

    - by user185646
    I would like to write my own version of Microsoft Live labs pivot.http://www.getpivot.com/ For this i will use realtime texture streaming technology like John Carmack did for doom4. But i would like to use Windows vista SetFileBandwidthReservation api to have the best throughput possible. For example // reserve bandwidth of 200 bytes/sec result = SetFileBandwidthReservation( hFile, 1000, 200, FALSE, &transferSize, &outstandingRequests ); What i dont understand is the lpTransferSize and lpNumOutstandingRequests return parameters. How should i next read the file for this to be the most worth it. Should i do exactly lpNumOutstandingRequests number of request of size lpTransferSize. Or can i do one synchronous request bigger than lpTransferSize.

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  • Programatically determining maximum transfer rate

    - by dauphic
    I have a problem that requires me to calculate the maximum upload and download available, then limit my program's usage to a percentage of it. However, I can't think of a good way to find the maximums. At the moment, the only solution I can come up with is transfering a few megabytes between the client and server, then measuring how ling the transfer took. This solution is very undesirable, however, because with 100,000 clients it could potentially result in too much of an increase to our server's bandwidth usage (which is already too high). Does anyone have any solutions to this problem?

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  • When is a program limited by the memory bandwidth?

    - by hanno
    I want to know if a program that I am using and which requires a lot of memory is limited by the memory bandwidth. When do you expect this to happen? Did it ever happen to you in a real life scenario? I found several articles discussing this issue, including http://www.cs.virginia.edu/~mccalpin/papers/bandwidth/node12.html http://www.cs.virginia.edu/~mccalpin/papers/bandwidth/node13.html http://ispass.org/ucas5/session2_3_ibm.pdf The first link is a bit old, but suggests that you need to perform less than about 1-40 floating point operations per floating point variable in order to see this effect (correct me if I'm wrong). How can I measure the memory bandwidth that a given program is using and how do I measure the (peak) bandwidth that my system can offer? I don't want to discuss any complicated cache issues here. I'm only interested in the communication between the CPU and the memory.

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  • Linux Experts Riddle: Network output of 10MB/s on 10GB/s NIC

    - by user150324
    I have two CentOS 6 servers. I am trying to transfer files between them. Source server has 10GB/s NIC nd destination server has 1GB/s NIC. Regardless to the command used nor the protocol, the transfer speed is ~1 Mega byte per second. The goal is at least couple dozens MB per second. I have tried: rsync (also with various encryptions), scp, wget, aftp, nc. Here's some testing results with iperf: [root@serv ~]# iperf -c XXX.XXX.XXX.XXX -i 1 ------------------------------------------------------------ Client connecting to XXX.XXX.XXX.XXX, TCP port 5001 TCP window size: 64.0 KByte (default) ------------------------------------------------------------ [ 3] local XXX.XXX.XXX.XXX port 33180 connected with XXX.XXX.XXX.XXX port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 1.0 sec 1.30 MBytes 10.9 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 1.0- 2.0 sec 1.28 MBytes 10.7 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 2.0- 3.0 sec 1.34 MBytes 11.3 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 3.0- 4.0 sec 1.53 MBytes 12.8 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 4.0- 5.0 sec 1.65 MBytes 13.8 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 5.0- 6.0 sec 1.79 MBytes 15.0 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 6.0- 7.0 sec 1.95 MBytes 16.3 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 7.0- 8.0 sec 1.98 MBytes 16.6 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 8.0- 9.0 sec 1.91 MBytes 16.0 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 9.0-10.0 sec 2.05 MBytes 17.2 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.68 MBytes 14.0 Mbits/sec I guess HD is not the bottleneck here.

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  • Is this a SEO SAFE anchor link

    - by Mayhem
    so... Is this a safe way to use internal links on your site.. By doing this i have the index page generating the usual php content section and handing it to the div element. THE MAIN QUESTION: Will google still index the pages using this method? Common sense tells me it does.. But just double checking and leaving this here as a base example as well if it is. As in. EXAMPLE ONLY PEOPLE The Server Side if (isset($_REQUEST['page'])) {$pageID=$_REQUEST['page'];} else {$pageID="home";} if (isset($_REQUEST['pageMode']) && $_REQUEST['pageMode']=="js") { require "content/".$pageID.".php"; exit; } // ELSE - REST OF WEBSITE WILL BE GENERATED USING THE page VARIABLE The Links <a class='btnMenu' href='?page=home'>Home Page</a> <a class='btnMenu' href='?page=about'>About</a> <a class='btnMenu' href='?page=Services'>Services</a> <a class='btnMenu' href='?page=contact'>Contact</a> The Javascript $(function() { $(".btnMenu").click(function(){return doNav(this);}); }); function doNav(objCaller) { var sPage = $(objCaller).attr("href").substring(6,255); $.get("index.php", { page: sPage, pageMode: 'js'}, function(data) { ("#siteContent").html(data).scrollTop(0); }); return false; } Forgive me if there are any errors, as just copied and pasted from my script then removed a bunch of junk to simplify it as still prototyping/white boarding the project its in. So yes it does look a little nasty at the moment. REASONS WHY: The main reason is bandwidth and speed, This will allow other scripts to run and control the site/application a little better and yes it will need to be locked down with some coding. -- FURTHER EXAMPLE-- INSERT PHP AT TOP <?php // PHP CODE HERE ?> <html> <head> <link rel="stylesheet" type="text/css" href="style.css" /> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="scripts.js"></script> </head> <body> <div class='siteBody'> <div class='siteHeader'> <?php foreach ($pageList as $key => $value) { if ($pageID == $key) {$btnClass="btnMenuSel";} else {$btnClass="btnMenu";} echo "<a class='$btnClass' href='?page=".$key."'>".$pageList[$key]."</a>"; } ?> </div><div id="siteContent" style='margin-top:10px;'> <?php require "content/".$pageID.".php"; ?> </div><div class='siteFooter'> </div> </div> </body> </html>

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  • In CentOS 4.3 Webmin 1.3000 bandwidth monitoring is eating disk space. How to delete those files?

    - by Silkograph
    I maintain Linux server being used for Mail, Squid and DNS service. Recently I observed that something was eating server disk space. But at last, today I caught the culprit which was consuming the disk by storing large number of files. On this server, Webmin 1.300 is installed. We use Squid proxy and Sarg to monitor Internet access. I always manually clear Sarg generated files under /var/www/html/squid for last few years. But I never realized that Webmin is also storing some kind of bandwidth log files in its' directory structure. I have noticed that under /etc/webmin/bandwidth/hours it has stored more thousands of files since year 2007 totaling about 17 GB. We have used 40 GB HDD for this server machine. My question is how can I delete those (/etc/webmin/bandwidth/hours) files safely?

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  • Implications of using many USB web cameras

    - by Martin
    I'm looking into connecting multiple low resolution USB webcams to a single computer. What implications might this have on performance? How does, for example, four 320x240 cameras fare against a single 640x480 camera? I'm not well versed in the architecture of the USB interface, what are the performance caveats? By performance I mean how would it affect the time to read the image data from multiple cameras compared to a single one.

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  • php curl upload speed

    - by zanatic
    hey i made a script that uploads files to different servers using php curl and the problem is that it eats all my upload bandwith and my apache does not respond as i would like. the call is made from the php-cli and can not use any apache bandwith limiting bandwith thanks in advance

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  • How many bits can be transfered through Ethernet at each time?

    - by Bobb
    I am writing a networking application. It has some unxpected lags. I need to calculate some figures but I cant find an information - how many bits can be transferes through Ethernet connection at each tick. I know that the resulting transfer rate is 100Mbps/1Gbps. But ethernet should use hardware ticks to sync both ends I suppose. So it moves data in ticks. So the question is how many ticks per second or how many bits per one tick used in ethernet. The actual connection is 100 Mbps full-duplex.

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  • How to measure the time taken by C# NetworkStream.Read?

    - by publicENEMY
    I want to measure time taken for client to receive data over tcp using c#. Im using NetworkStream.Read to read 100 megabits of data that are sent using NetworkStream.Write. I set the buffer to the same size of data, so there no buffer underrun problem etc. Generally it looks like this. Stopwatch sw = new Stopwatch(); sw.Start(); stream.Read(bytes, 0, bytes.Length); sw.Stop(); The problem is, there is a possibility where the sender hasnt actually sent the data but the stopwatch is already running. how can i accurately measure the time taken to receive the data? i did try to use the time lapse of the remote pc stream.Write, but the time it took to write is extremely small. by the way, is the stopwatch is the most accurate tool for this task?

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  • Measure data transfer rate over tcp using c#

    - by publicENEMY
    i want to measure current download speed. im sending huge file over tcp. how can i capture the transfer rate every second? if i use IPv4InterfaceStatistics or similar method, instead of capturing the file transfer rate, i capture the device transfer rate. the problem with capturing device transfer rate is that it captures all ongoing data through the network device instead of the single file that i transfer. how can i capture the file transfer rate? im using c#.

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