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  • How can one domain route to an always-changing pool of servers?

    - by ryeguy
    I'm sure this is an easy solution, I'm just not too familiar with how DNS works or if that's even related to this problem. If I'm running a web service on amazon ec2, distributed across many instances, how can I make it so a single domain name can be used to access the entire pool of servers, which will be changing from time to time? Since the instances may be present one second but gone the next (and vice versa), I need a way to randomly pick an active member of the cluster to route to. The updates would have to be instantaneous. Is this even possible, with dns caching and all?

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  • How can I remove unwanted cropped pages from Acrobat

    - by Servant
    Executing the crop command in Acrobat from a 3000pt * 2000pt document to 1500pt*1800pt only hides the document outside of the new boundaries but the original document still remains without change; if anyone uses the touch-up tool and moves the content, all "hidden" information outside the cropped page may appear again by dragging it into view. The page acting as a window (or a mask) to display the 3000pt * 2000pt. I am wondering if there is a solution to crop permanently the document without reprinting it again into PDF file? Please find pictures attached: http://i.stack.imgur.com/5JTPg.png http://i.stack.imgur.com/HPokv.png

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  • Print each bookmark of a PDF separately

    - by Dave
    I have a very large (1000 page) PDF which contains about 100, ten page each documents one after the other. I would like to have them sent to my office printer as individual files so my office printer will print them double sided and staple each one individually. I'm using Adobe Acrobat X and think the first step is to bookmark the start of each of those 100 documents. I don't know the next step though. I also have a batch printing program so if i can extract each of those 100 bookmarks to individual files that would work too. Thanks for all the help.

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  • nginx rewrite for wikkawiki

    - by Hans
    Just setup WikkaWiki on my server, I have been trying to have the links go from wiki.mysite.info/wikka.php?wakka=Start into wiki.mysite.info/DotMG. I tried following their guide at http://docs.wikkawiki.org/ModRewrite, however it seems incomplete and outdated. Furthermore, as of version 1.3.2 base_url isn't even manually configurable from the wikka.config.php file. I am using version 1.3.2 of WikkaWiki. My nginx virtual hosts file contains: server { listen 80; server_name wiki.mysite.info; root /usr/share/nginx/wikka/; access_log /usr/share/nginx/.access/wikka; error_log /usr/share/nginx/.error/wikka error; location / { index index.php; try_files $uri $uri/ @wikka; } location @wikka { rewrite ^(.*/[^\./]*[^/])$ $1/ last; rewrite ^(.*)$ /wikka.php?wakka=$1 last; } location ~* \.php$ { fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; include /etc/nginx/fastcgi_params; } } Thus far it works, I can go to wiki.mysite.info/APage and it'll display that page, however it doesn't work on all pages, sometime the browser simply downloads the page (For some reason it always downloads the Start page). Also when I go to wiki.mysite.info/ it downloads the wikka.php file... Furthermore, the links on the wiki have the wikka.php?wakka= so whenever I navigate around the wiki, it goes back to being wiki.mysite.info/wikka.php?wakka=APage. I think something is wrong with my rewrite but I can't say for sure. Contents of the fastcgi_params: fastcgi_param QUERY_STRING $query_string; fastcgi_param REQUEST_METHOD $request_method; fastcgi_param CONTENT_TYPE $content_type; fastcgi_param CONTENT_LENGTH $content_length; fastcgi_param SCRIPT_FILENAME $request_filename; fastcgi_param SCRIPT_NAME $fastcgi_script_name; fastcgi_param REQUEST_URI $request_uri; fastcgi_param DOCUMENT_URI $document_uri; fastcgi_param DOCUMENT_ROOT $document_root; fastcgi_param SERVER_PROTOCOL $server_protocol; fastcgi_param GATEWAY_INTERFACE CGI/1.1; fastcgi_param SERVER_SOFTWARE nginx/$nginx_version; fastcgi_param REMOTE_ADDR $remote_addr; fastcgi_param REMOTE_PORT $remote_port; fastcgi_param SERVER_ADDR $server_addr; fastcgi_param SERVER_PORT $server_port; fastcgi_param SERVER_NAME $server_name; fastcgi_param HTTPS $server_https; # PHP only, required if PHP was built with --enable-force-cgi-redirect fastcgi_param REDIRECT_STATUS 200;

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  • Configuring memcached for a particular scenario

    - by pradeepchhetri
    I have a web application which queries opentsdb server(which in backend using Hbase cluster) for the datapoints of different metrics and using dygraph javascript graphing library, I am plotting those metrics. Since getting all the datapoints of past one day from opentsdb for a particular metric is itself taking nearly 2 seconds, my application which is plotting nearly 25 metrics is becoming very slow. In order to reduce this latency, I am thinking of using memcached module of php5 for caching all the queries. But I have few questions regarding memcached. Is there any way I can configure memcache to keep on updating its cache in the background by running some command line queries after particular interval of time. Is there any way I can configure memcache to always reply for a query using cache instead of first updating its cache because my application just plots datapoints for past one day. Missing out some datapoints is not that critical.

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  • Link two or more text boxes in Visio

    - by Dan
    I am working on creating a template in Visio 2007 (Professional). Each page should reflect a document number and a revision number (two text boxes). I would like to make the template such that entering or changing text in one of these boxes on one page will automatically update the equivalent text boxes on all other pages. Is there an easy way to link two (or more) text boxes to show the same data (mirror each other)? I've looked into creating a ShapeData set and then using the ShapeData field in place of each box, but this will require training others to access and adjust the ShapeData field. In short - I want the issue that was attempting to be solved in Changing Text in Visio Org Chart Shape Changes Multiple Shapes' Text .

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  • Automate opening HTML and printing to PDF

    - by craigpatik
    I need a way to automate the following process in Windows 7: Open an .html file in Internet Explorer Print to PDF Save the PDF with a patterned file name (i.e., original_name_YYYY-MM-DD.pdf) Ideally, I could drag and drop several files or open a whole folder of files at once and a PDF would be created for each one. A command line solution is also acceptable. The files have to be opened in the browser because parts of the page are rendered with JavaScript on page load. In other words, if you simply right-click on the file in Explorer and choose "print", the resulting file is not the same because the JS didn't run. If it helps, Internet Explorer can be set as the default browser, and a PDF printer can be set as the default printer.

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  • windows print service

    - by user1631171
    Hi my college has a HP color printer that can be used to print both A3 and A4 size color printouts. It is connected to a windows 2008 print server. The windows event viewer provides the status of printouts using event id 307. I would like to know if it is possible to find out if an A3 page was printed or A4 page was printed. Is this information also logged in windows event viewer. Or is there any other event id that captures this information. Also the number of copies printed should be captured in event id 805. I have read in some forums that sometimes the value is wrong. Please provide me some information on this. Thanks in advance.

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  • MySQL performance over a (local) network much slower than I would expect

    - by user15241
    MySQL queries in my production environment are taking much longer than I would expect them too. The site in question is a fairly large Drupal site, with many modules installed. The webserver (Nginx) and database server (mysql) are hosted on separated machines, connected by a 100mbps LAN connection (hosted by Rackspace). I have the exact same site running on my laptop for development. Obviously, on my laptop, the webserver and database server are on the same box. Here are the results of my database query times: Production: Executed 291 queries in 320.33 milliseconds. (homepage) Executed 517 queries in 999.81 milliseconds. (content page) Development: Executed 316 queries in 46.28 milliseconds. (homepage) Executed 586 queries in 79.09 milliseconds. (content page) As can clearly be seen from these results, the time involved with querying the MySQL database is much shorter on my laptop, where the MySQL server is running on the same database as the web server. Why is this?! One factor must be the network latency. On average, a round trip from from the webserver to the database server takes 0.16ms (shown by ping). That must be added to every singe MySQL query. So, taking the content page example above, where there are 517 queries executed. Network latency alone will add 82ms to the total query time. However, that doesn't account for the difference I am seeing (79ms on my laptop vs 999ms on the production boxes). What other factors should I be looking at? I had thought about upgrading the NIC to a gigabit connection, but clearly there is something else involved. I have run the MySQL performance tuning script from http://www.day32.com/MySQL/ and it tells me that my database server is configured well (better than my laptop apparently). The only problem reported is "Of 4394 temp tables, 48% were created on disk". This is true in both environments and in the production environment I have even tried increasing max_heap_table_size and Current tmp_table_size to 1GB, with no change (I think this is because I have some BLOB and TEXT columns).

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  • Linux periodically "losing" ability to connect to server via SSH?

    - by gct
    I know this isn't exactly a programming question, but it popped up in my use of git for programming projects at least. I've got a web server that I use to host my git repos on, but my ubuntu box seems to "lose" the ability to connect to it via SSH. I'll get a "connection refused" error when I try to ssh or use git. Rebooting my local machine will fix the problem, but only temporarily. I can still connect to the web interface just fine, and the problem manifests with other servers as well. I've been working around it by pulling my changes over to my laptop and pushing from there, but that's sub-optimal as you can imagine. Has anyone seen something like this? I'd be tempted to say it's some kind of IP caching problem, but I can't connect even using the IP address of the server directly... Running Ubuntu 9.04

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  • How to tell IIS7 to allow POST to a text file (to solve 405)?

    - by meticulous
    If I want to allow HTTP POST to text files *.txt (i.e. I'm taking an example of what could be any static resource normally accessible by GET). The error is: Server Error 405 - HTTP verb used to access this page is not allowed. The page you are looking for cannot be displayed because an invalid method (HTTP verb) was used to attempt access. How can I accomplish this? Background: I'm using apps.facebook.com to hit my hosted facebook app and facebook sends HTTP POST now through to the iFrame hosting my app. This facebook behaviour has been around for a while but it's being forced now. In turn this forces me to make stuff available to the POST verb.

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  • Reverse Proxy (mod_rewrite) and Rails (absolute paths)

    - by SooDesuNe
    I have front end rails app, that reverse proxies to any of a number of backend rails apps depending on URL, for example http://www.my_host.com/app_one reverse proxies to http://www.remote_host_running_app_one.com such that a URL like http://www.my_host.com/app_one/users will display the contents of http://www.remote_host_running_app_one.com/users I have a large, and ever expanding number of backends, so they can not be explicitly listed anywhere other than a database. This is no problem for mod_rewrite using a prg:/ rewrite map reverse proxy. The question is, the urls returned by rails helpers have the form /controller/action making them absolute to the root. This is a problem for the page served by mod_rewrite because links on the proxied page appear as absolute to the domain. i.e.: http://www.my_host.com/app_one/controller/action has links that end up looking like /controller/action/ when they need to look like /app_one/controller/action mod_proxy_html seems like the right idea, but it doesn't seem to be as dynamic as I would need, since the rules need to be hard coded into the config files. Is there a way to fix this server-side, so that the links will be routed correctly?

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  • Why is my concurrency capacity so low for my web app on a LAMP EC2 instance?

    - by AMF
    I come from a web developer background and have been humming along building my PHP app, using the CakePHP framework. The problem arose when I began the ab (Apache Bench) testing on the Amazon EC2 instance in which the app resides. I'm getting pretty horrendous average page load times, even though I'm running a c1.medium instance (2 cores, 2GB RAM), and I think I'm doing everything right. I would run: ab -n 200 -c 20 http://localhost/heavy-but-view-cached-page.php Here are the results: Concurrency Level: 20 Time taken for tests: 48.197 seconds Complete requests: 200 Failed requests: 0 Write errors: 0 Total transferred: 392111200 bytes HTML transferred: 392047600 bytes Requests per second: 4.15 [#/sec] (mean) Time per request: 4819.723 [ms] (mean) Time per request: 240.986 [ms] (mean, across all concurrent requests) Transfer rate: 7944.88 [Kbytes/sec] received While the ab test is running, I run VMStat, which shows that Swap stays at 0, CPU is constantly at 80-100% (although I'm not sure I can trust this on a VM), RAM utilization ramps up to about 1.6G (leaving 400M free). Load goes up to about 8 and site slows to a crawl. Here's what I think I'm doing right on the code side: In Chrome browser uncached pages typically load in 800-1000ms, and cached pages load in 300-500ms. Not stunning, but not terrible either. Thanks to view caching, there might be at most one DB query per page-load to write session data. So we can rule out a DB bottleneck. I have APC on. I am using Memcached to serve the view cache and other site caches. xhprof code profiler shows that cached pages take up 10MB-40MB in memory and 100ms - 1000ms in wall time. Pages that would be the worst offenders would look something like this in xhprof: Total Incl. Wall Time (microsec): 330,143 microsecs Total Incl. CPU (microsecs): 320,019 microsecs Total Incl. MemUse (bytes): 36,786,192 bytes Total Incl. PeakMemUse (bytes): 46,667,008 bytes Number of Function Calls: 5,195 My Apache config: KeepAlive On MaxKeepAliveRequests 100 KeepAliveTimeout 3 <IfModule mpm_prefork_module> StartServers 5 MinSpareServers 5 MaxSpareServers 10 MaxClients 120 MaxRequestsPerChild 1000 </IfModule> Is there something wrong with the server? Some gotcha with the EC2? Or is it my code? Some obvious setting I should look into? Too many DNS lookups? What am I missing? I really want to get to 1,000 concurrency capacity, but at this rate, it ain't gonna happen.

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  • Site's performance slows over time until Apache is restarted

    - by udbhav
    I'm running a Django app w/ Nginx and Apache. All our static media is stored on S3, and basically it takes a while for the app to check if thumbnails have been created every time a page is loaded. To alleviate this problem, I'm caching the output of the templates w/ memcached. Over the course of an hour or two, the site's speed goes down significantly, until I restart apache, and then all is good for a little while. I have very little sysadmin experience, and was hoping somebody could at least point me in the right direction.

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  • How to show users the reason for a message being bounced or rejected by Postfix?

    - by Ross Bearman
    A user would like to be able to view a web page showing any emails that a Postfix server has either been unable to send, or unable to receive. For example if the user was supposed to receive an email from a third party but it hasn't arrived, they'd be able to check the web page and see a list of emails rejected by Postfix, along with a clear reason as to why. I've been unable to find an existing application that offers this functionality. Does anyone know of any, or is the best way forward to write a script that parses the log and display the results?

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  • Ubuntu in Virtualbox - web server very slow when using local IP address

    - by Lenny Marnham
    I'm using Ubuntu (Lucid Lynx) to learn Ruby On Rails. I'm running Ubuntu in VirtualBox (the host is Windows 7 Ultimate), using bridged networking. When I run my Rails app and point the browser at it using localhost:3000, the app responds immediately and my page is rendered in a second or two. However, if I use 10.0.0.5:3000 (where 10.0.0.5 is my IP address reported using ifconfig), the response from my rails app is incredibly slow - maybe 30 seconds or more for the server to respond and render the page. This happens in both Firefox and Chrome. Also, when I hit the Rails app from the host (to test it in IE), I get the same slooooooow response. Any ideas what might be going on? I've tried it with two different routers, and on two different networks (work and home) with the same result. Cheers all.

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  • Setting up Apache directory root behavior

    - by Corey
    I'm running Apache on a Windows machine for local testing and I'm new to it. Currently, if I navigate to localhost/ in a web browser, it will display an index.html page if one exists. Otherwise, it will display the directory listing. How can I make it so that navigating to a root directory will display more than index.html? What I need is so that if either: index.html, index.htm, or index.php exist, it will navigate to one of those. How can I disable showing directory roots? I would like it to return a 403 Forbidden error if no index page exists.

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  • Delete Google Chrome's tab history

    - by wizlog
    After browsing the web for a while, I want to delete my history. So I press CTRL and H keys, and click the Edit items on the blue bar at the top of the page. Then I select the checkboxes for the items I want to remove. Then I click remove selected items. When I go into any of my open tabs, their history isn't deleted. Without restarting the tab or the browser, is there any way to clear the history within a tab? I also want to know how to clear just one tab's history, without needing to know all the pages that the tab had visited, then going to the history page...

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  • User WinWget to keep web site alive in a Windows Server 2003

    - by Menelaos Vergis
    I have a site that must stay alive due to a service that runs and check a directory for changes. The site is running in IIS at a Windows Server 2003 and the solution I came up it that I will Schedule a task that requests the home page every 5 minutes. I am sure that this way the site will stay alive almost all the time. I have downloaded Wget from Wget from Windows and I have installed it at my windows server 2003 but I don't know how to use it in order to ping the server but not download anything. Since I want to use this forever I don't want to save anything on the disk, can you provide me with the command that pings a web page but don't save anything on the disk?

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  • Is there a way to adjust colors of a specific window?

    - by Synetech
    Is there a (Windows) program or something that will allow the user to adjust the brightness/contrast/gamma of a specific window rather than the whole screen? As a use-case scenario, imagine having a web-page showing on one half of the screen, and another program taking up the rest of the screen. This other program uses the default Windows colors (e.g., white background), so it may be glaringly bright. Alternately, the web-page may be too dark to see. Adjusting the monitor or video-card settings would affect everything which will be no good. Adjusting the default Windows colors is, at best, inconvenient. Instead, there needs to be a way to set the colors of one of the windows to equalize the whole screen.

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  • A name was started with an invalid character. Error processing resource

    - by Gallen
    Here is the exact error I'm getting when I try to launch my default.aspx file from the published folder. Can anybody point me in the right direction? The XML page cannot be displayed Cannot view XML input using XSL style sheet. Please correct the error and then click the Refresh button, or try again later. -------------------------------------------------------------------------------- A name was started with an invalid character. Error processing resource 'file:///C:/inetpub/wwwroot/MHNProServices/Default.... <%@ Page Title="" Language="C#" MasterPageFile="~/ProServices.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs"... Here are the contents of default.aspx <%@ Page Title="" Language="C#" MasterPageFile="~/ProServices.Master" AutoEventWireup="False" CodeBehind="Default.aspx.cs" Inherits="MHNProServices.Default" %> <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"> <link type="text/css" href="css/Default.css" rel="Stylesheet" /> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server"> <div id="contentHead"> <img src="css/img/heading_landing.jpg" /> </div> <div id="contentTop"></div> <div id="content"> <div id="contentLeft"> <asp:Image ID="displayPicture" runat="server" /> <img id="displayOverlay"src="css/img/profilepicture_overlay.gif" /> <a id="contentButton_makeAppointment" href="Appointments.aspx?step=start"></a> <a id="contentButton_cancelAppointment" href="Appointments.aspx?step=cancel"></a> </div> <div id="contentRight"> <h3><asp:Label ID="lbl_homepageHeader" runat="server" Text=""></asp:Label></h3> <hr /> <asp:Label ID="lbl_homepageContent" runat="server" Text=""></asp:Label> </div> </div> <div id="contentBottom"></div> </asp:Content>

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  • centos server shared files

    - by Kyle Hudson
    Hi, I am wanting to implement a multi-server specialised hosting environment. I currently have a cloud solution comprising of 3 centos boxes (2 lamp web servers, 1 mysql). What I am wanting to do is, implement a 5 server solution where they is 3 web servers, 1 mysql box and a fileshare. Basically I want the fileshare to host all the web files for the servers, the caching will remain on the individual servers and the sessions will be stored in mysql. So what I am asking is how do I map the servers to share the same "docroot"? Is it NFS? if so whats the best way about doing this? Thanks in advance.

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  • If email not received then do X (outlook 2013 on Exchange 2010)

    - by Brad
    I receive notification emails daily and would like to automate an easier way to manage all of those notifications. For example: Notification 1 from [email protected] is received daily between 10pm-1am Notification 2 from [email protected] is received daily between 12am-3am Notification 3 from [email protected] is received daily between 1am-4am I am looking for a way to page myself at [email protected] on my cellphone if any of these messages are not received within the defined time frame of when the email should have arrived. I would like to basically email a page like: ATTENTION Notification 2 not received within the allowed range. This way I would be notified instead of having to check the email manually and see that I only received 2 of the three alerts. Is there a way to do this in Outlook? Our exchange server is a hosted exchange server on GoDaddy if that info is needed.

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  • Joomla in Windows is catching my access to a Virtual Directory where I placed my MVC application

    - by Romias
    In our windows hosting we use the root (wwwroot) folder to host a JOOMLA website as public website. This is running IIS 7. Then, we created a virtual directory called "App" to host there a ASP.NET MVC4 application. When I enter www.mydomain.com it shows the joomla website correctly. When I enter www.mydomain.com/App/ it somehow access my MVC app... as I see the URL changing to www.mydomain.com/App/Account/LogOn?ReturnUrl=%2fApp%2f BUT shows a 404 Joomla error as if it were looking that URL in Joomla. BTW, the hosting has 2 ASP.NET IIS Setup options: 4.0 Classic and 4.0 integrated. Using the Integrated one... it displays a blank page... using the classic one shows the 404 Joomla page. Any idea where to look for this?

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  • Occasional HDD Related Hangs

    - by diolemo
    I have an issue that seems to be disk related. Occasionally my system will block for 30 or so seconds and is mostly unresponsive. Those things already in memory requiring no disk access continue to function but those things requiring disk access (even small) hang. 30 seconds later everything is back to normal. I have 2 Samsung drives in RAID 0. I have 1 WD drive (has pagefile) I have an SSD used for caching (Intel Smart Response). This is a new install of Windows and the drives were fine in my old PC (~1 month ago). Has anyone experienced anything similar? Any suggestions to solve this one? Thanks in advance.

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