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• ASP.Net MVC 3: multiple versions of the site without changing of URL, is it possible?

  - by Seacat

  Our website is written in ASP.NET MVC 3 and we want to change a feature in the core functionality of the site. The problem is not every client can be moved to this new version/format (because of some technical inner restrictions) so it means that we need to keep 2 versions of the same functionality (backend and frontend) simultaneously. We don't want our clients to worry about URLs, so the ideal solution would be keep the same URL but redirect clients to the different versions. The information about clients is stored in database. So the moment when user (client) logs in we know which version of site we should show. I'm thinking about routing and areas but I'm not sure if it's possible for example to have 2 areas with the different versions of the same application. Or is it possible to load the assemblies on the fly? After user is logged in we can decide if (s)he should be redirected to the new or old version. As far as all the clients have been moved to the new version we don't need this system more. How can I do this in ASP.NET MVC?

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• BSOD / Reboot Cycling (possibly after windows update?)

  - by Mikey.B

  Windows XP SP3 Hi Guys, My desktop PC rebooted during the night (presumably due to an automated Windows update) and was stuck on a file system check. I forced a reboot as it had been stuck for hours and now the system won't finish booting. It shows the Windows XP splash screen, briefly flickers what looks to be a BSOD, and then reboots. So far, I've tried: Booting into all variations of safe mode (just hangs) Setting BIOS settings to fail-safe defaults (still reboots) Choosing the start-up option to load last known good configuration (still reboots) Any suggestions on how to proceed here? I haven't installed any recent software or hardware so I don't think this is a result of any explicit change I've made. -M

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• Django on Windows 2003 Slow Initially

  - by John

  I have setup Django to run on a windows 2003 server following the steps on the django wiki. Everything works fine and there are no errors. Only one instance of Django is setup on the server at the moment. However whenever the first page is requested it takes about 10 seconds to load the page. After this every page loads instantly. All my searches about speed issues with Django on windows refer to the local server, but not when using IIS and PyISAPIe. Thanks

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• Why does it sometimes take over a minute for Apache2.2 to serve a static page?

  - by Jason Lamoreux

  We have a Windows Server 2003 machine running Apache2.2. Most of the time there is no load on the server, but we have a notification program on 3400 PC's that can request a small web page that plays a 64KB .wav file. When an event occurs those 3400 PC's all request the web page over the course of 3 minutes. On a few machine we saw the browser sit in the "connecting" state for a little over a minute before the page painted. What is happening, and how can we speed this up?

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• Zend Framework 2 loading slow and loss of connection using WAMP

  - by Charlie

  I've been facing an issue with Zend framework running on my local Wamp 2.2 server. I am not sure what I'm doing wrong but ZF2 seems to load really slow when making an http request. Any other request to a php or html file seems to run smoothly. Also, sometimes when the loading time takes longer, I get this message: "The connection to [virtualhostname] was interrupted" I then need to hit refresh to complete the request. I checked apache error log and everything looks fine. Please, I appreciate any type of guide/suggestion to take care of this issue. I followed the starter guide word by word.

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• CentOS I/O blocking flushing dirtypages

  - by user3662224

  I have an Apache webserver on CentOS. It is not doing anything fantastic or complicated at all but it does at intervals experience a high load (120 for 4 CPUs) for some reason. During this time I see high waits and write durations. I have narrowed this down to flushing of dirtypages to disk to make room for new data. I have tried many things and talked to the developers who are also puzzled by this. I am stumped. Details: vmware virtual guest server 4 cpus 12G RAM Apache PHP I have 40 servers in this cluster that share the same disk structure. Only the webservers are experiencing this issue. Any ideas?

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• Realtime website slowness (PHP/MYSQL)

  - by 3s2ng

  We got a website with realtime transactions. The past few days we experienced some slowness during a period of time. Usually the slowness last for 5 minutes. And also during the slowness we noticed that sometimes we can not connect to SSH and FTP or sometimes very slow to connect to those services. Currently we are trying to identify the issue. We already setup database monitoring tool. Now are about to signup with pingdom.com My question is. If the website is too slow due to the database (table or row lock) will it affect the other services like SSH and FTP? Does the ping correlates the page load and the connection between my PC and server? Thanks, Mark

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• Xubuntu 12.04: Slow Login

  - by naxchange

  I'm running Xubuntu 12.04, and after I ran the update, my login started slowing down big time. I've dabbled a little bit with the programs in Settings - Settings Manager - Session and Startup, and tried closing and opening these programs, and then rebooting. Anyways, I narrowed it down to a combination of 2 processes, "Network" (the connection manager) and "Xfce Volume Daemon". Their corresponding terminal commands are: ~$ nm-applet ~$ xfce4-volumed If I disable them, and then run them after login is complete, everything works just fine. Is there a way for me to run these commands automatically at start up? I want to maybe write a shell script and save it somewhere, or at least edit the order things happen after login, so the desktop can load before these processes. Hope I've been clear enough, and thanks in advance! NAX

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• How do I sync a subset of tables between two databases on the same mysql database server

  - by Mike

  would like to be able to sync a subset of tables between two mysql databases that are running on the same server. One of the databases acts as the master where inserts, updates and deletes can be made. The second database uses those same tables for read-only operations. I do not want to use federated tables to achieve this. The long term goal will be to separate the 2 databases to multiple servers, The second database that has the subset of tables as read-only may also be replicated a few times over to distribute geographically for load and performance purposes each with unqiue data.... Once that is achieved, I plan to use binlog to replicate those specific tables on the secondary databases. In the meantime, I'd like to keep these tables in sync. Is there a more elegant way to do this than other than using a cronjob and mysqldump?

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• Setting up IIS 7.5 for AD Client Certificates for iOS devices

  - by vonsch

  I am working on getting an iPad to auth to an IIS7.5 website using a local certificate mapped to a user in AD. I am not, in any sense of the word, an IIS admin. I essentially need to setup a proof of concept. I believe that this may work, but I just have no idea how to do it. What I have so far is an iPad with a user certificate installed. I have this user certificate added the correlating user account in AD. What I would like is a basic text webpage to load showing the user that it is authenticating. I would like this page to not be viewable unless it is client certificate authenticated. I don't mind doing the legwork, but I really don't know where to begin on the IIS side. Can anyone point me in the right direction?

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• Does a hard drive degrade if we always write to the same directory?

  - by code-gijoe

  I have a very heavy I/O application that is constantly receiving data through the network and writing to a specific directory on the HDD. Then, the application need to load the files from that specific place. One of my clients has been experiencing slowness and when I try to access the directory it takes quite long before I can see the content. My gut feeling is the HDD is degrading due to high I/O for a couple of years and I'm thinking of changing the HDD. Is there a benefit to write to multiple directories instead of using always the same? BTW he is using Windows XP.

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• Trouble getting OS fingerprinting to work in iptables

  - by user1197457

  Everyone, As I understand it, OSF has been merged with the Kernel since 2.6.before-my-kernel-version. Yet when I do something like this: iptables -I INPUT -j ACCEPT -p tcp -m osf --genre Linux --log 0 --ttl 2 and I get an error like: iptables: No chain/target/match by that name iptables -L Shows no rules because I did an iptables -F at one point. ALSO, the following command: cat /proc/net/ip_tables_matches Does not show "osf" on the list. A google doesn't seem to help. I've also installed iptables-devel in hopes I'd be able to load the osf module. Sadly I haven't been able to get that to work. Centos 6.4 minimal Any guidance?

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• Live search/filter as you type in client approach

  - by Pinoniq

  As an exercise for myself to practice my JavaScript "skills" I'm trying to write a client-side filter. It should be able to filter "content blocks" as the user types. By "content block", I mean a list of DomElements that each contain at least one text node - it is possible that they contain more, and even a different amount of text nodes, nested inside other nodes, etc. I've thought of 2 approaches: On page initialization, scan all nodes and store all the text in some kind of Map or a tree. Simply iterate over every item and check whether it has the string to search/filter for. One could add performance here by caching, only filtering the current remaining items if text is added, etc. Obviously, if the number of nodes is really big, option 1 will take a while to build the 'index' but it will perform faster once it is built. Option 2 however will be available right on page load since no initialization is performed. But of course it will take longer to search. So my question is: what is the best approach here? And how would one implement 'caching' and/or 'index'?

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• How does Google manage to serve results so fast?

  - by Quintin Par

  I am building an autocomplete functionality for my site and the Google instant results are my benchmark. When I look at Google, the 50-60 ms response time baffle me. They look insane. In comparison here’s how mine looks like. To give you an idea my results are cached on the load balancer and served from a machine that has httpd slowstart and initcwnd fixed. My site is also behind cloudflare From a server side perspective I don’t think I can do anything more. Can someone help me take this 500 ms response time to 60ms? What more should I be doing to achieve Google level performance?

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• How can I limit the amount of messages SendMail will recieve in a single incoming connection?

  - by Mike B

  Is there a way to limit how many messages can be received by SendMail in a given SMTP session? I have a SendMail server and an upstream application server is trying to send dozens (potentially hundreds) of messages to it in a single SMTP session (ehlo... mail from... rcpt to... data... rset... mail from... etc). This is causing resource strain on the box since the traffic isn't effectively load balanced. I'd like to implement a policy to have sendmail only allow up to X number of messages in a given SMTP session after which it will require the remote host to reconnect again. I noticed that there's a confCONNECTION_RATE_THROTTLE option but that seems to protect more against multiple connections occurring at once - not a single connection sending a bunch of emails.

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• OS won't boot during vs2010 install on vista 64

  - by Noam

  I am installing vs2010 on a vista 64bit machine. During the install it asked for a restart. Since that, vista won't load. I tried restore to previous good config - didn't help. I am only able to boot it using safe mode with networking. When I did that, it continued the vista part of the install (the screen with the 3 out of 3 updates) but after that when I restarted again - still fails. HELP!!!

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• Forward external traffic to 127.0.0.1

  - by user2939415

  I have an HTTP server running on 127.0.0.1:8000. How can I use iptables or something to route external traffic to it? I want to be able to access my.ip.addr:8000 from my browser. iptables -A PREROUTING -i eth0 -p tcp --dport 8000 -j REDIRECT --to-ports 8000 does not help EDIT: To test whether or not this works I am using the following node.js script: // Load the http module to create an http server. var http = require('http'); // Configure our HTTP server to respond with Hello World to all requests. var server = http.createServer(function (request, response) { response.writeHead(200, {"Content-Type": "text/plain"}); response.end("Hello World\n"); }); // Listen on port 8000, IP defaults to 127.0.0.1 server.listen(8000, "127.0.0.1"); // Put a friendly message on the terminal console.log("Server running at http://127.0.0.1:8000/");

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• Does the nginx “upstream” directive have a port setting?

  - by orzzzzz

  moved from:http://stackoverflow.com/questions/3748517/does-nginx-upstream-has-a-port-setting I use upstream and proxy for load balancing. The directive proxy_pass http://upstream_name uses the default port, which is 80. However, if the upstream server does not listen on this port, then the request fails. How do I specify an alternate port? my configuration: http{ #... upstream myups{ server 192.168.1.100:6666; server 192.168.1.101:9999; } #.... server{ listen 81; #..... location ~ /myapp { proxy_pass http://myups:81/; } } nginx -t: [warn]: upstream "myups" may not have port 81 in /opt/nginx/conf/nginx.conf:78.

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• Solr on Tomcat (Ubuntu OS) installation help

  - by Camran

  I have to install Solr on my Ubuntu Server. However, Solr wont work without Tomcat or another container, and also Java. I have successfully installed tomcat6 and java. BUT, in a tomcat6 guide online, it says I should configure iptables to allow connections via port 8080, which I have done. Then the guide says I can test the tomcat6 by going to: http://my_ip_adress:8080 But this makes the browser just load and wait somehow for a response, and finally display "website not available". I have NO clue how to install Solr with Tomcat. Does anybody know how? How do I know Tomcat6 works? BTW: When I do this: /etc/init.d/tomcat6 start then it says OK. If you need something let me know, I really need help with this one. Thanks UPDATE: When executing this: sudo /etc/init.d/tomcat6 status it respons is Tomcat servlet engine is running with pid 28641

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• Speed up connection to MySQL

  - by Leonick

  So here's one for you. Any idea on a way to shorten the time it takes to connect to a MySQL database? The reason I'm wondering is because I find that just connecting to the DB adds just over a second to the rendering of the page and that seems a bit long considering Apache and MySQL is running on the same machine and the mysqli_connect is connecting to localhost. It's just such a shame when the connection takes a second while any query I end up doing won't add any significant amount of time to the render/load time. Any ways to shorten the time it takes to open a connection?

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• best tool for searching within unstructured log files [closed]

  - by Alex Holding

  i am supporting a number of bespoke applications at the minute and searching through their very non standard logs is a nightmare, so im looking for a tool which can do the following - load large text files search through multiple files at once and display all results can search with regex can be used to view and search unstructured text files There are some great looking log tools available but they all seem to be focused on structured logs, where the logs i deal with most days are just flat text files. I am currently using notepad++ but that has its own annoyances so im hoping there is a dedicated log analysis tool that i havent found yet.

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• How do OSes work on multiple CPUs? [on hold]

  - by user3691093

  Assumption: "OS es (atleast in some part) should be written in assembly.Assembly programs are CPU specefic." If so how can one os run on different CPUs ? For example: how is that I can load Ubuntu on different systems having different CPUs (like intel i3,i5,i7, amd a8,a6,etc) from the same bootable disk? Does the disk contain seporate assembly programs for each CPU? Are these CPUs 'similar' enough to run the same assembly program? Is my assumption wrong? Something else.... Thanks for responding. I tried to find out in what way are the CPUs that I mentioned 'similar'. I came across the concepts of Instruction Set Architecture and Microarchitecture of CPUs.A CPU will understand a program if it is combatible with its ISA. Even if CPUs are 'wired up' differently (different microarchitecture) , as long as the ISA implemented on top is same ,the program will work. ARM and x86 have different ISA ( that why there are 2 windows 8 versions, right?). And if an app program is written in an HLL with compilers for both platforms we will saved from wasting time writing 2 programs. Did I understand anything wrong? Are there programs that can take a compiled program as input and produce a program executable on another CPU as output? Is it possible? (Virtualisation?) 32 bit windows programs do install on 64 bit windows ,dont they? Arent 64 bit CPUs 'differerent' from 32 bit CPUs? They do get seporate OS versions, right? Is this backward combatibility achieved using programes mentioned in (3) ?

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• Seperating paid and free users on SQl Server 2008 R2

  - by Alex

  Right now we have hundreds of "free demo" trial users on the same db server/database with our paid mission critical users. I see this as both a security risk and a load issue. I have also seen cases where demo users run large reports and crash the server.. Does it make sense to separate these users into separate databases on SQL? Rather than just have one DB for all users? My thinking is so one group of users has no effect on the other? Can one group still pose a risk if we do this? I plan to have them on separate web servers also (windows 2008 r2, iis 7, .net 4.0)

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• Webserver - Memory-bound or CPU-bound? [closed]

  - by JJP

  Possible Duplicate: How do you do Load Testing and Capacity Planning for Web Sites I'm installing a social network using Zend Framework & MySql, with lots of plugins & queries. I want Webserver & Sql server on one box. I'm trying to choose between two machines (on hetzner.de): A) intel i7-2600 3.4 GHz 16 GB DDR3 RAM B) intel i7-920 2.6 GHz 24 GB DDR3 RAM B has 50% more RAM but 30% slower clock speed. Q is: is it obvious where the bottleneck will be? Would I ever need 24GB of RAM, even with lots of concurrent users?

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• Hardware needed for 2000 users? [closed]

  - by Trcx

  I have school assignment that is fairly well defined, requiring us to come up with a plan for an environment serving dynamic web applications to 2000 users, and should be able to scale up to six thousand. I have done plenty of research as far as load balancing, redundancy, UPSs, etc, but am having a hard time figuring out how much hardware is actually needed in the way of physical servers, ram, processing power, etc. The assignment states that the server will have a lot of dynamic code, email, and a database are required, all utilizing the appropriate microsoft service (MS SQL, Exchange, IIS). I already plan on splitting them out on to separate servers, but can't even fathom the hardware requirements of something that large scale. Could someone with experience weight in on this, or point me two some good articles?

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