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• String literals vs constants for Session[...] dictionary keys

  - by FreshCode

  Session[Constant] vs Session["String Literal"] Performance I'm retrieving user-specific data like ViewData["CartItems"] = Session["CartItems"]; with a string literal for keys on every request. Should I be using constants for this? If yes, how should I go about implementing frequently used string literals and will it significantly affect performance on a high-traffic site? Related question does not address ASP.NET MVC or Session.

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• JavaScript - Why does google-maps wait until jquery finishes download?

  - by Teddyk

  I'm using the following Google Maps autload (asynchronous) to load asynchronous both Google Maps v3 and JQuery, like so: <script type="text/javascript" src="http://www.google.com/jsapi?autoload={ "modules":[ {name:"maps",version:3,other_params:"sensor=false"},{"name":"jquery","version":"1.4.2"},{"name":"jqueryui","version":"1.8.1"} ]}"></script> However, looking at the network traffic, it appears that it is not downloading asynchronously. Question: Does anyone understand why the %7Bcommon (google-maps) file is being delayed from download until the jquery-ui.min file completes download first?

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• simpledb, sql azure, mysql + memcached

  - by sirmak

  For a new scalable high traffic global ecommerce website (asp.net) project which technology fits best (max. scalability & performance, min. price & maintenance)? amazon simpledb, microsoft sql azure, mysql + memcached combo, or your solution...

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• Is it possible to simulate load balancers, and how much performance gain they provide?

  - by Lakhlani Prashant

  I have a website which runs on IIS (Asp.net application, some of them are in dotnetnuke also) and we are expecting higher numbers of traffic on some of the sites, so we are planning to add a load-balancer, but before going to do that, we just want to know is it worth to do that? So, I want to know if is it possible to simulate load balancer, and how much performance gain they provide?

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• How do I configure an extreme feedback device to notify CI build status?

  - by Gishu

  Trying to save the next guy/gal some trouble in finding out what is needed to setup lava lamps or traffic lights or what have you (the term I believe is eXtreme Feedback Devices) as a BIG VISIBLE INDICATOR of your continuous integration build status. Ensure your post includes... (and please don't mess this question up with imaginative responses.. although it may be insanely funny at the point of conception) the XFD what 'helper' hardware is needed software that you managed to hook it up with detailed instructions on how to set it up

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• Sample application to read and inspect packets on a network?

  - by franz

  Hi, I'm looking to write a quick program to read and inspect packets of a certain format and then blacklist ips with a certain style of packet-traffic (packet patterns of an attack against the network). Are there decent samples of reading and inspecting packet flow on a network?

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• Can we sniff packets between 2 machines in a network from a third machine using wireshark or etherea

  - by coolcake

  I have a small network in which there are 2 electronic devices and one desktop connected using a switch. Through the desktop with Ethereal/wireshark installed on it, can I sniff the packets that are being communicated between the 2 electronic devices? I cannot install ethereal or wireshark on either of the electronic devices, but need to monitor the traffic between the 2 devices from my desktop, which is connected via the same switch.

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• is it possible to symulate load balancers, and how much performance gain they provide?

  - by Lakhlani Prashant

  I have a website which runs on IIS (Asp.net application, some of them are in dotnetnuke also) and we are expecting higher numbers of traffic on some of the sites, so we are planning to add a load-balancer, but before going to do that, we just want to konw is it worth to do that? so, I want to know if is it possible to simulate load balancer, and how much performance gain they provide?

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• How do I modify a HTTP response packet with winpcap?

  - by httpinterpret

  There are two problems here: What if content is encoded:gzip... Do I also need to change the header part to make the HTTP packet valid(checksums if any?) UPDATE Can someone with actual experience elaborate the steps involved? I'm using winpcap and bpf tcp and src port 80 to filter the traffic,so my job lies in this callback function: void packet_handler(u_char *param, const struct pcap_pkthdr *header, const u_char *pkt_data)

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• How do I access Glassfish V3 Administration Console Website from a remote host

  - by Tom

  I have installed Glassfish v3 on a standalone server running ubuntu-server 9.10. I can open the Admin website if I use a browser running on the server by browsing to: http:// localhost:4848/ I would like to access it from a remote machine by browsing to something like http:// mydomain.com:4848/ The firewall is definitely allowing traffic through on that port (4848) and I can access the application server by browsing to: http:// mydomain.com:8080/ How can I allow remote access to the administration website?

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• Ideal PHP Session Size?

  - by Jason

  Hi, I have a PHP form (mortgage app) that is about 400 fields, traffic on the site will be low. What is the ideal Session size for 400 fields going into a MySQL db? In PHP.ini what do I set? Anything I should set that I am missing? -Jason

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• How can a new hire/intern make a good impression?

  - by Tristan

  In a week I start at my first real programming internship for a multinational company, I want to know, aside from "hard work" what can I do to prepare for this? How do I be a good new employee? (FYI, my first assignment is to help the team with "enhancements to our test driver to automate our regression testing" on an air traffic control system written in ADA)

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• C# & ASP.Net - determine linq query generation time

  - by Chris Klepeis

  I'd like to detemine the amount of time it takes for my ASP.Net program to generate certain sql queries using linq.... note - I want the query generation time, not the query execution time. Is this possible, or even feasable (if its usually fast)? My website has some heavy traffic and I want to cover all of my bases.

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• What is the point to put deadlock code ahead of JSON in HTTP response?

  - by Morgan Cheng

  When sniffing Gmail and Facebook traffic, I found there are leading deadlock code before JSON response of XmlHttpRequest. For example for (;;);{"t":"continue"} and while(1); [["v","nW3OxUDq0kU.en.","8","51bec53f21305d9c"],["di",86]] What is the purpose of this "for(;;);" and "while(1);" deadlock?

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• Other than UDP Broadcast or Multicast, what other methods can I use on a WiFI network to discover co

  - by Gubatron

  I've implemented a simple ping/pong protocol to discover other computers connected to the same WiFI router. This works fine on many routers, but it seems some public routers have UDP traffic blocked or disabled. What other options do I have to discover the computers connected to the router? I was thinking of brute forcing TCP attempts (trying to open connections to all possible IPs on my subnetwork) but this would be very costly and I would have to cycle several times and still not find every machine that's recently connected to the network.

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• HTTPS intercept

  - by Adrian

  I don't know much about SSL, but I've read something and I was wondering if it's possible to intercept the communication between client and server (for example, a company can monitor employees data transfer?). I thought it was a difficult task, but it looks like that it is very simple. When a client requests a https connection the router can be instructed to intercept the key exchange and send to the server and the client it's own public keys (further it can encode/decode the hole traffic). Is it true, or I'm misunderstanding something?

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• Windows equalivalent to eth0

  - by Justin Fuller

  Is there a generic IP device name for windows similar to "eth0" used by Linux and Solaris? I am attempting to monitor SCTP traffic, which appears to be successful passing the ip address, but this means for every machine to use this application would changing to use the host address. Thanks

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• Good SMTP server on Windows for a production server

  - by Waleed Eissa

  I'm going to have my website hosted soon on a VPS or dedicated server (with Windows 2008), so I'm trying to plan ahead. I wonder whether the built-in SMTP server that comes with IIS7 is reliable enough for a production server or should I look for an alternative? I heard good things about hmailserver and best of all it's free, do you have any experience with using the bulit-in SMTP on a high traffic website. Thanks a lot for any suggestions

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• Are Multi-column Primary Keys in MySQL a optimisation problem?

  - by David

  Been looking into using multi-column primary keys and as performance is extremely important with the size of traffic and database I need to know if there is anything to consider before I start throwing out the unique ID method on many of my tables and start using mulit column primary keys. So, what are the performance/optimisation pros/cons to using multi column primary keys versus a basic single column, auto-inc primary key?

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• Permission Denied IE iFrame

  - by Tom

  Hi Guys, I have a site on A.com and an iframe on B.com which calls javascript from A.com. This works great in FF. In IE7 / 8 I am getting a Message: Access is denied. message. I have checked the HTTP Traffic via Fiddler - and I can see that it isn't blocked in Fiddler ? Any ideas what could be causing this and how to solve ?

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• Develop a HTTP Monitor in C#

  - by Tony

  I'd like to develop an application to monitor HTTP traffic to/from my PC. (what websites are being visited by the PC user). The problem is, that I couldn't get any articles how to start developing application like that. What am I missing?

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• Minimum Connection Pool Size

  - by Fujiy

  I have a website with high traffic. Maybe I will increase minimum connections pool, to 100. This is too high? Website have 10000 pageviews/day Thanks

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• Redirect old directory to new website

  - by JonP

  I want to use htaccess to redirect all traffic from www.oldsite.com/directory to www.newsite.com I want to make it so that when visitors view any webpage within www.oldsite.com/directory (ie. www.oldsite.com/directory/contact.html) it gets redirected to the homepage of www.newsite.com I tried "Redirect /directory http:www.newsite.com" but the webpage the visitor is trying to access within the directory gets attached to the new sites url (ie. www.newsite.com/contact.html)

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• Fastest and stable non-sql database?

  - by Pavel

  What is the fastest and most stable non-sql database to store big data and process thousands requests during the day (it's for traffic exchange service)? I've found Kdb+ and Berkeley DB. Are they good? Are there other options?

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• How do you compare Websphere Commerce with the rest of the ecommerce tools available in the market?

  - by sarego

  All those familiar with websphere commerce will know that it is feature rich. It supports B2B, B2C and extended sites(which ATG doesn't) and some other features. But it is complicated, and on the performance and reliability front it still seems to leave a lot to be desired. Any opinions on which would be better for a high traffic site?

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