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  • Separation of memory oriented process and CPU oriented process

    - by Jeevan Dongre
    I am develops guy working for an e-commerce company I am running my e-commerce application built using ruby on rails spree commerce. I am presently running 2 medium instances in the production. One is a high memory instance which has 3.8 RAM and single Core CPU and another one is high CPU instance which has Dual Core CPU. Basically AWS calls it has m1.medium and c1.medium instance respectively. My question is it possible to separate the processes according the cpu intense and memory intense? So that all the cpu intense process can be made run in high cpu instance and all the memory intense process can be made to run in the high memory instances. Is any tool available to identify those process. Kindly give me some heads up. Thank you

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  • Help to argue why to develop software on a physical computer rather than via a remote desktop

    - by s5804
    Remote desktops are great and many times a blessing and cost effective (instead of leasing expensive cables). I am not arguing against remote desktops, just if one have the alternative to use either remote desktop or physical computer, I would choose the later. Also note that I am not arguing for or against remote work practices. But in my case I am required to be physically present in the office when developing software. Background, I work in a company which main business is not to develop software. Therefore the company IT policies are mainly focused on security and to efficiently deploying/maintaing thousands of computer to users. Further, the typical employee runs typical Office applications, like a word processors. Because safety/stability is such a big priority, every non production system/application, shall be deployed into a physical different network, called the test network. Software development of course also belongs in the test network. To access the test network the company has created a standard policy, which dictates that access to the test network shall go only via a remote desktop client. Practically from ones production computer one would open up a remote desktop client to a virtual computer located in the test network. On the virtual computer's remote desktop one would be able to access/run/install all development tools, like Eclipse IDE. Another solution would be to have a dedicated physical computer, which is physically only connected to the test network. Both solutions are available in the company. I have tested both approaches and found running Eclipse IDE, SQL developer, in the remote desktop client to be sluggish (keyboard strokes are delayed), commands like alt-tab takes me out of the remote client, enjoying... Further, screen resolution and colors are different, just to mention a few. Therefore there is nothing technical wrong with the remote client, just not optimal and frankly de-motivating. Now with the new policies put in place, plans are to remove the physical computers connected to the test network. I am looking for help to argue for why software developers shall have a dedicated physical software development computer, to be productive and cost effective. Remember that we are physically in office. Further one can notice that we are talking about approx. 50 computers out of 2000 employees. Therefore the extra budget is relatively small. This is more about policy than cost. Please note that there are lots of similar setups in other companies that work great due to a perfectly tuned systems. However, in my case it is sluggish and it would cost more money to trouble shoot the performance and fine tune it rather than to have a few physical computers. As a business case we have argued that productivity will go down by 25%, however it's my feeling that the reality is probably closer to 50%. This business case isn't really accepted and I find it very difficult to defend it to managers that has never ever used a rich IDE in their life, never mind developed software. Further the test network and remote client has no guaranteed service level, therefore it is down for a few hours per month with the lowest priority on the fix list. Help is appreciated.

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  • Bad IIS 7.5 performance on webserver

    - by Robert P.
    I have a webpage (ASP.NET 4.0 / MVC 4). On my development machine (i5-2500 3.3 8GB Win7 VS2010 SP1 Fujitsu Esprimo P700) the page performs with 160 requests/sec on devenv webserver on my machine. The page performs with 250 requests/sec on my local IIS 7.5. (uncompiled web) The page performs with 20 requests per second on a 16core 32gb ram production server (Fujitsu RX-300 w2k8 rc2 IIS 7.5). (compiled web) Why? I think it's the IIS configuration but i can't figure out whats the problem. The page runs with 1 worker process on both machines. Web garden is not an option (it helps but the app isnt compatible with)

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  • Setting up SSL on Nginx, Passenger, Sinatra

    - by 12preschph
    I have a Sinatra app that runs both on locally and on Heroku. When visiting my site over HTTPS across Heroku, it will indeed work as Heroku provides this by default. How can I set up SSL to work on my localhost machine? I will enable my Sinatra app to only allow secure connections so I need to test this both in development and production. Currently, I am running the following locally: SERVER= nginx/1.6.0 + Phusion Passenger 4.0.42 Also, where is my nginx folder? I don't have it installed in the normal location (Ubuntu) so this must come custom with Passenger?

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  • Logical move of a server to UK, what do I do with the SSL certificates

    - by flyfishr64
    I have been asked to move a rails application from the US to the UK. This involves bringing up the rails stack on Ubuntu 8.04.4; that's completed. I'm stumped with the SSL configuration though. The plan was to bring this server up with the same domain name but temporarily use a subdomain (app2.xxx.com instead of app.xxx.com) during the move and for testing, then rename it to app.xxx.com when we're ready for the cutover (does that make sense?). In the meantime, we need a new cert for the app2 subdomain. So to generate a CSR, I need a server key but do I need a new one, or should I copy the one from the existing production server?

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  • Deactivate SYN flooding mechanism

    - by mlaug
    I am running a server that is running a service on port 59380. There are more than 1000 machines out there connecting to that service. Once I need to restart the service all those machines are connecting at the same time. That made some trouble as I have seen that log entry in kern.log TCP: Possible SYN flooding on port 59380. *Sending cookies*. Check SNMP counters. So I changed sysctl net.ipv4.tcp_syncookies to 0 because the endpoints to not handle tcp syn cookies correctly. Finally I restarted my network to get the changes in production Next time I had to restart the service, the following message was logged TCP: Possible SYN flooding on port 59380. *Dropping request*. Check SNMP counters. How can I prevent the system for doing such actions? All necessary counter measures are done by iptables...

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  • EXMPP Buillding Error

    - by pradeepchhetri
    I am trying to install exmpp but while building i am getting the following error: exmpp_tls_openssl.c: In function 'init_library': exmpp_tls_openssl.c:622: error: 'SSL_OP_NO_TICKET' undeclared (first use in this function) exmpp_tls_openssl.c:622: error: (Each undeclared identifier is reported only once exmpp_tls_openssl.c:622: error: for each function it appears in.) make[2]: *** [exmpp_tls_openssl_la-exmpp_tls_openssl.lo] Error 1 I have openssl-dev and openssl both installed. Can someone please tell me what is the problem.

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  • What methods are there to configure puppet to serve resources for multiple environments?

    - by cclark
    I seem to come across two ways for using puppet in multiple environments: 1) Install a puppetmaster in each environment and only update the recipes from source control for that environment when ready to deploy the recipes in that environment. 2) Use one puppetmaster and use a variable in the puppet.conf of each client to specify the environment and then in the puppetmaster specify a different modulepath for each environment and each of those paths is updated to the branch of the recipe repository intended for that environment (e.g. dev, staging, production). Only running one puppetmaster seems like it is one less piece of infrastructure to keep running but there is some additional complexity in the configuration. Are there additional pros or cons to one of these methods or something which I'm missing entirely?

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  • Is an I/O benchmark made for hardware an accurate assessment of a Windows VM's performance under vSphere 5?

    - by Jeremy
    We support an enterprise application running on Windows Server 2008 R2. One of our customers has chosen to install to VMWare, and what I'm finding is that the VM's are relatively slow compared to hardware. Our product development team has advised that many VMs appear to run particularly slow on I/O benchmarks, which impact performance in production. I've tried the AttoSoft I/O benchmark and find that for smaller I/O blocks (1-32K) the VM I'm looking at is 25x slower than hardware and for larger I/O blocks (1-8MB) it's 10x slower. Is this a fair benchmark? If not, any suggestions for a fair test?

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  • ios App Disclaimer

    - by Max
    I am writing an application for iPhone and had some questions regarding eula :- If I do not include any disclaimer/ eula in my app, then would Apple's standard EULA http://www.apple.com/legal/internet-services/itunes/appstore/dev/stdeula/ automatically apply to my app ? If I include a small disclaimer inside my application (as a popup on initial screen), then would Apple's EULA still cover my app ? I tried downloading few apps on my ipad and did not see Apple's standard EULA. So, where can I actually see the EULA before downloading something ?

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  • Android: ScoreNinja is only displaying 1 highscore....

    - by Dave B
    Hi All, I am trying to implement ScoreNinja into one of my apps. It all seems to work, but when I submit a score it replaces the current #1 score with any that I supply, even it is lower. This means that only one score is ever displayed. Anyone got any idea what I'm doing wrong? I have e-mailed the dev but he/they haven't responded. Thanks in advance for any info on this, most appreciated! Dave B

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  • nginx + reverse proxy question

    - by Joe Pilon
    Hello, I am using nginx right now for our production sites with the reverse proxy to apache that's on the same server and it works fantastic. I'm wondering if I can do this: Install nginx on box #1 in say Canada and have it reverse proxy http requests to box #2 in a datacenter in the USA. I know there may be some latency or delays in loading the page etc but that would probably be not noticable to the end user especially if both servers have 100mb ports. Box #2 only does the apache requests, all images are served from box #1 via nginx. Now, would the end visitor be able to tell in any which way that there are 2 boxes being used? Box #2 has sensitive data which we can't have stolen in the event of hacking etc, so this method helps keep things a bit more secure. Anyone know if this is possible or have done something similar?

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  • Prompt for user group when logging into OSX domain

    - by mattdwen
    When a user is a member of more than one group, when logging in to a 10.6 machine, it shows a prompt asking for what group to apply settings for. We're using the groups to mount different shares, e.g. Production and Accounts, based on user membership. Often, a user is a member of more than one group, and needs all the drives available. The Open Directory server is running 10.6 also. Is there a way to skip this prompt and apply settings for all groups. I can foresee that there may be conflicts between group settings, but perhaps a priority can be set too? Or is this totally the wrong way to go about this?

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  • How To Bind ComboBox With ListItems in windows Forms?

    - by hatem gamil
    hi all i want to make a 2 comboBoxes ,the first one shows Hours and the Second Shows minutes but i cant do so in windows application as i have working as a web dev for a while and i forgot so i want to declare listItems then bind it to combo box i want to make it as a custom control so i want some help to tell me how to do that i am using VS 2008 thnxx

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  • Apache 2 Symbolic link not allowed or link target not accessible

    - by astropanic
    My apache server runs as user foo. I have some Rails applications in /home/foo/app1 /home/foo/app2. Each of them has an vhost <VirtualHost *:80> ServerName app1.foobar.com ServerAlias www.app1.foobar.com DocumentRoot /var/www/html/app1/current/public RailsEnv production <Directory /var/www/html/app1/current/public> AllowOverride all Options -MultiViews </Directory> </VirtualHost> I have a symlink in /var/www/html/app1 : current -> /home/foo/app1/tmp_20102611 All file permissons are set correctly (user foo group foo), I can go through the filesystem from shell. SELINUX is disabled Distro is CentOs 5.5 Which the above symlink I get an 403 and an error entry in error_log Symbolic link not allowed or link target not accessible:/var/www/html/app1/current When I symlink my app in the subdir of /var/www/html instead of /home/foo it works. How I can avoid this error still placing my app in my /home/foo directory ?

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  • what is the meaning of *this* crontab setting?

    - by aXqd
    * */1 * * * sh foo.sh I found this setting on one production machine. And foo.sh was executed every one minute. I am guessing that the original author of this setting wants it to be executed every one hour. And I cannot find the official meaning of this setting in the crontab man page. Hence please help. UPDATE: I extracted these logs from that machine, however I cannot find the law out of them. 2013-06-29 20:47:01 2013-06-29 20:50:02 2013-06-29 20:51:01 2013-06-29 20:53:01 2013-06-29 20:54:01 2013-06-29 20:57:01 2013-06-29 20:58:01 2013-06-29 21:00:01 2013-06-29 21:05:02 2013-06-29 21:10:02

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  • Backup Solr home

    - by user226188
    I'm new to Solr: I've successfully installed Tomcat and Solr 4.3.1 webapp, and two collections on a CentOS 6.4 machine. Now, my server is in production and I need to make backups of solr. So, I would like to know what is the best way to backup solr... For the moment I'm dooing: stop tomcat = tar of my solr home = start tomcat, but I've read that is not a good solution? Moreover, this implie to stop all the tomcat which have other webapps than solr. I've also heard that there is a script named "backup" in solr home bin's folder ? but my bin folder is empty :( I don't want to make an another slave server with replication, for me it's not a backup solution because my backup are supposed to be send to a bacula backup server all nights. There is no builtin solution that I can work around to make a script ? like a mysqldump for Mysql servers. Thanks for help !

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  • HP p410i array controller - what happens if i add memory?

    - by James
    I have a p410i array controller that only has 256ram. We want to create a raid 5 so we have procured a 512 write back cache module. If we install the write back cache, will this erase the existing raid information. The server currently has 2 disks in raid 1. 6 are spare waiting for an upgrade to create a raid 5. the concern is if we replace/upgrade the memory for the controller, we will wipe the existing production raid 1 array. Thanks in advance.

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  • Phantom horizontal scroll bars on the whole window in IE.

    - by Stephen
    I'm working on a website layout you can find at dev.movingcost.com In most browsers, everything seems fine... but I'm getting a horizontal scroll bar on the window when viewing the page in IE. I'm using a fixed width of 960px with auto margins to center the content. I've even tried using "overflow-x:hidden" on the html and body tags to no avail... any clue where the problem is?

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  • iPhone app not running on iPhone

    - by Jon
    I have my iPhone setup on my computer at home, with my developer account and provisioning profile. I'm trying to get it setup on my work computer so I can run work apps on it as well. My work has their own dev account. I created an app ID and privisioning profile on my personal account and downloaded it on my work computer but its not letting me compile and run on my iPhone. It says valid provisiong profile not found on executable.

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  • IIS slow response

    - by Martin Ševic
    I have developed ASP.NET 4.5 application which take infos about sensors from sqlite database every 3 seconds. This application runs nice on my local develop machine on IIS Express server. I have created virtual machine (4x 3,25 GHz CPU; 6GB RAM) where i have installed Windows Server 2012 and IIS 8 service in order to test application on real server because we will run it on production machine later. After installing VC++ 2010 x64 and VC++ 2010 x86 and set "Enable 32-bit application" to true in application pool website started to work but there is a large problem with response time. There is a for example 10 seconds delay before page loads. CPU utillization is about 10% and RAM about 1,5GB. I am new to configuring IIS server so i want to ask if there is some tip how to make it faster. I am sure, there will be some twist which will make it normal work. Many thanks.

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  • Apache Virtual host Subdomains points to same directory

    - by Jakobud
    I have setup subdomains using Apache before and have never really ran into any big problems. But with this (I believe Centos) server that is one of my clients, I'm not understanding what I'm doing wrong. Here is the .conf that apache is loading: Listen 80 NameVirtualHost *:80 <VirtualHost *:80> ServerName www.thedomain.com DocumentRoot /u1/thedomain.com/public RailsEnv production </VirtualHost> <VirtualHost *:80> ServerName subdomain.thedomain.com DocumentRoot /u1/subdomain.thedomain.com/public_html </VirtualHost> When I access either the primary or subdomain addresses, they both point to the primary www.thedomain.com content. Any thoughts? UPDATE: Yes I did a configtest and graceful after making the changes.

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  • How to setup libsoup for ubuntu

    - by michael
    Hi, I am trying to install libsoup for my ubuntu environment: checking for LIBSOUP... configure: error: Package requirements (libsoup-2.4 >= 2.28.2) were not met: No package 'libsoup-2.4' found I tried $ sudo apt-get install libsoup2.4-dev and now it said: checking for LIBSOUP... configure: error: Package requirements (libsoup-2.4 >= 2.28.2) were not met: Requested 'libsoup-2.4 >= 2.28.2' but version of libsoup is 2.4.1 Thanks for any suggestion in how to fix this problem.

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  • Dot Net Nuke module works in "Edit" mode but not for "View": cache problem?

    - by Godeke
    I have a DNN task that simply runs some Javascript to compute a price based on a few input fields. This module works fine on our production site, but we had a company do a skin for us to improve the look of the site and the module fails under this new system. (DNN 05.06.00 (459) although it was 5.5 prior... I updated in a futile hope that it was a bug in the old revision.) What is incredibly odd about this is that the module works fine when I'm logged in to DNN and using the Edit mode as an administrator. In this case the small snippet of JavaScript loads fine and filling the fields results in a price. On the other hand it I click "View" (or more importantly, if I'm not logged in at all) the page loads a cached copy. Even odder, I have found the cache files in \Portals\2\Cache\Pages are generated and then only the cached data is being used. When the cached copy is loaded, the JavaScript doesn't appear (it is normally created via a Page.ClientScript.RegisterClientScriptBlock(). Additionally, the button which posts the data to the server doesn't execute any of the server side code (confirmed with a debugger) but instead just reloads the cached copy. If I manually delete the files in \Portals\2\Cache\Pages then everything works properly, but I have to do so after every page load: failing to do so simply loads the page as it was last generated repeatedly. Resetting the application (either via the UI or editing web.config) doesn't change this and clearing the cache from the Host Settings page doesn't actually clear these cached pages. I'm guessing that Edit mode bypasses the cache in some way, but I have gone as far as turning off all caching on the site (which is horrible for performance) and the cached version is still loaded. Has anyone seen anything like this? Shouldn't clearing the cache clear the files (I'm using the File provider for caching)? Shouldn't even a cached page go back to the server if the user posts back? EDIT: I should point out that permissions don't appear to be a problem on the cache directory... other pages cached output are deleted from this folder, just this page has this issue. EDIT 2: Clarifying some settings and conditions which I didn't provide. First, this module works fine in production under DNN 5.6.0. In our test environment with the consulting company's changes it fails (the changes are skin and page layout only in theory: the module source itself verifies as unchanged). All cache settings and the like have been verified the same between the two and we only resorted to setting the module cache to 0 and -1 (and disabling the test site's cache entirely) when we couldn't find another cause for the problem. I have watched the cache work correctly on many other pages in test: there is something about this page that is causing the problem. We have punted and are creating an installable skin based on the consultant's work as I suspect they have somehow corrupted the DNN install (database side I think).

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