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  • Is there any kind of established architecture for browser based games?

    - by black_puppydog
    I am beginning the development of a broser based game in which players take certain actions at any point in time. Big parts of gameplay will be happening in real life and just have to be entered into the system. I believe a good kind of comparison might be a platform for managing fantasy football, although I have virtually no experience playing that, so please correct me if I am mistaken here. The point is that some events happen in the program (i.e. on the server, out of reach for the players) like pulling new results from some datasource, starting of a new round by a game master and such. Other events happen in real life (two players closing a deal on the transfer of some team member or whatnot - again: have never played fantasy football) and have to be entered into the system. The first part is pretty easy since the game masters will be "staff" and thus can be trusted to a certain degree to not mess with the system. But the second part bothers me quite a lot, especially since the actions may involve multiple steps and interactions with different players, like registering a deal with the system that then has to be approved by the other party or denied and passed on to a game master to decide. I would of course like to separate the game logic as far as possible from the presentation and basic form validation but am unsure how to do this in a clean fashion. Of course I could (and will) put some effort into making my own architectural decisions and prototype different ideas. But I am bound to make some stupid mistakes at some point, so I would like to avoid some of that by getting a little "book smart" beforehand. So the question is: Is there any kind of architectural works that I can read up on? Papers, blogs, maybe design documents or even source code? Writing this down this seems more like a business application with business rules, workflows and such... Any good entry points for that? EDIT: After reading the first answers I am under the impression of having made a mistake when including the "MMO" part into the title. The game will not be all fancy (i.e. 3D or such) on the client side and the logic will completely exist on the server. That is, apart from basic form validation for the user which will also be mirrored on the server side. So the target toolset will be HTML5, JavaScript, probably JQuery(UI). My question is more related to the software architecture/design of a system that enforces certain rules. Separation of ruleset and presentation One problem I am having is that I want to separate the game rules from the presentation. The first step would be to make an own module for the game "engine" that only exposes an interface that allows all actions to be taken in a clean way. If an action fails with regard to some pre/post condition, the engine throws an exception which is then presented to the user like "you cannot sell something you do not own" or "after that you would end up in a situation which is not a valid game state." The problem here is that I would like to be able to not even present invalid action in the first place or grey out the corresponding UI elements. Changing and tweaking the ruleset Another big thing is the ruleset. It will probably evolve over time and most definitely must be tweaked. What's more, it should be possible (to a certain extent) to build a ruleset that fits a specific game round, i.e. choosing different kinds of behaviours in different aspects of the game. This would do something like "we play it with extension A today but we throw out extension B." For me, this screams "Architectural/Design pattern" but I have no idea on who might have published on something like this, not even what to google for.

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  • How come the ls command prints in multiple columns on tty but only one column everywhere else?

    - by David Lou
    Even after using Unix-like OSes for a couple years, this behaviour still baffles me. When I use the ls command in a directory that has lots of files, the output is usually nicely formatted into multiple columns. Here's an example: $ ls a.txt C.txt f.txt H.txt k.txt M.txt p.txt R.txt u.txt W.txt z.txt A.txt d.txt F.txt i.txt K.txt n.txt P.txt s.txt U.txt x.txt Z.txt b.txt D.txt g.txt I.txt l.txt N.txt q.txt S.txt v.txt X.txt B.txt e.txt G.txt j.txt L.txt o.txt Q.txt t.txt V.txt y.txt c.txt E.txt h.txt J.txt m.txt O.txt r.txt T.txt w.txt Y.txt However, if I try to redirect the output to a file, or pipe it to another command, only a single column appears in the output. Using the same example directory as above, here's what I get when I pipe ls to wc: $ ls | wc 52 52 312 In other words, wc thinks there are 52 lines, even though the output to the terminal has only 5. I haven't observed this behaviour in any other command. Would you like to explain this to me?

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  • Change the number of consecutive frequent ssh login before temporary blocking the user login

    - by Kenneth
    my server currently would temporarily refuse a user to login for certain amount of time (maybe ~20min) if the user consecutively frequent ssh login for 3 times. Can I change this behaviour (say relaxed the definition of frequent maybe from 'within 5 sec' to 'within 10 sec'; or increase the # of consecutive login from 3 to 5)? Thanks. Added: Ah.. now I think the problem was not with the ssh. I just tried on another newly installed server. consecutive successful login won't block the user. I have no sudo permission on the server I mentioned above. Now I suspect this behaviour may cause by the firewall in the system. Thanks everyone's comments. ADDED 2: Ah... after some searches. I think the server is using /sbin/iptables to do it as I can see the iptables program is there even though I don't have permission to list the rules. Thanks everyone, special thank to jaume and Mark!

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  • Why are SMART error rates going down?

    - by Jeff Shattock
    I have a hard drive that's part of a Linux software raid5 array. SMART has reported that its multi_zone_error_rate was 0, then 1, then 3. So I figured I better start backing up more frequently and prepare to replace the drive. Now, today, the multi_zone_error_rate of that very same drive is back down to 1. It seems that 2 errors unhappened while I wasn't looking. I've also seen simliar behaviour by inspecting the syslog on the server. Jun 7 21:01:17 FS1 smartd[25593]: Device: /dev/sdc, SMART Usage Attribute: 7 Seek_Error_Rate changed from 200 to 100 Jun 7 21:01:17 FS1 smartd[25593]: Device: /dev/sde, SMART Usage Attribute: 7 Seek_Error_Rate changed from 200 to 100 Jun 7 21:01:18 FS1 smartd[25593]: Device: /dev/sdg, SMART Usage Attribute: 7 Seek_Error_Rate changed from 200 to 100 Jun 8 02:31:18 FS1 smartd[25593]: Device: /dev/sdg, SMART Usage Attribute: 7 Seek_Error_Rate changed from 100 to 200 Jun 8 03:01:17 FS1 smartd[25593]: Device: /dev/sdc, SMART Usage Attribute: 7 Seek_Error_Rate changed from 100 to 200 Jun 8 03:01:17 FS1 smartd[25593]: Device: /dev/sde, SMART Usage Attribute: 7 Seek_Error_Rate changed from 100 to 200 These are raw values, not the human-useful values that smartctl -a produces, but the behaviour is similar: error rates changing, then undoing the change. None of these are the drive that had the multi_zone weirdness. I haven't seen any problems from the RAID; its most recent scrub ( < 24 hours ago) came back totally clean. The only thing I can think of is that the SMART reporting circuitry on the drive isn't working properly all the time. The cables are in tight on the drive and board. What's going on here?

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  • USB External HDD NOT spinning down on Windows Vista / Windows 7

    - by Deepak
    I have 3 external 2.5" USB HDDs - all from different manufacturers and with different capacities. I also have access to multiple Windows Vista / Windows 7 / Windows XP computers. My problem is that with the Windows Vista and Windows 7 computers, the external USB drives DO NOT spin down when I do "Safely remove hardware". Windows will tell me that I can safely remove the device, but I can see (and feel the rotations of the disk when I touch the casing) that the disks are still spinning and NEVER spin down. They also never go into their suspended state (which is generally signaled with a slow flashing of the activity LED). However, with Windows XP, when I do "Safely remove hardware", I can see that the drives do indeed spin down without any issues and go into their respective suspended states. I notice that this behaviour is consistent across all my 3 drives and on different hardware. Has anybody else noticed the same issues? Is there any way we can have the same behaviour as Windows XP on Windows Vista and 7, because I feel on the long run, disconnecting the drives while they are still spinning will have a negative effect on their life span. Thanks, Deepak.

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  • Mac OS X Lion (10.7) Drive Encryption

    - by Skoota
    My iMac has two drives (a 256 GB solid-state drive, and regular 2 TB hard drive). The Mac OS X Lion system is installed on the solid-state drive and, like many other users, I have moved my user profile folder onto the secondary 2 TB drive. However, as you may be aware, FileVault 2 on Mac OS X Lion (10.7) only encrypts the system drive. This leaves my data drive (containing my user profile folder, with all of my data) unencrypted. I am aware that work arounds for this issue exist (such as https://github.com/jridgewell/Unlock) but I am not happy with the results since they involve decrypting the data drive on startup using a LaunchDaemon (before any users have logged into the computer) essentially meaning that any user who logs onto the computer will see the unencrypted drive. I would like a method which will only unencrypted the data when an authorised user logs into the computer. As such, is there a way to do one of the following? Encrypt the entire data drive and only decrypt the drive when an authorised user logs into the computer. This would be equivalent behaviour to the Lion FileVault 2 feature, but on a secondary drive rather than the system drive. Encrypt only the user profile folder on the data drive, and only decrypt the folder when the user logs into the computer. This would be equivalent to the behaviour of FileVault 1 on previous versions of Mac OS X? I am happy to pay for a commercial third-party product that provides the required feature(s), but I have not yet been able to find one. Thanks in advance for any assistance.

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  • EXCEL workbook, intermitently, takes 30 seconds to load

    - by Julio Nobre
    I am trying to figure out why a simple .XLS EXCEL workbook is taking, randomly, 30 seconds to open. Before answering: Please, bear mind the following: Problem symptoms Hanging is intermitent and it takes exactly 30 seconds; During hanging there is no cpu or disk activity; It only happens during workbook load. Every runs smooth after that; Windows Explorer.exe hangs on folder, but all other folders, system and applications are still responsive; There are no consecutive hangings. I have to wait for while to reproduce this behaviour; All workbooks where located on a local drive (C:\BPI); The workbook has no macros and no addins; Office 2003 is being used for several years; The computer is running Windows XP; Computer has several network mapped drives, all addressed to main file server; Recently, main fileserver was replaced by Windows 2011 SBS Standard Edition What I have done so far I have traced machine Explorer.exe, using Process Monitor, added Duration column, and filtered by Duration 1. That's is how I found that hanging was taking exactly 30 seconds. For further information, please refer to Oliver Salzburg tutorial. Using Process Monitor, I have also figured out than five operations were taking most of sample collecting duration. Looking at sample image below, column Operation below you will notice that one single operation was taking 29 seconds; I have tried different workbooks (all of them smaller than 30 KB); I have, temporarily, removed all shortcuts on User Document's folder that were pointing to network drives or shares; I have runned CCleaner to fix registry issues; I made sure that there were no external links on tested workbooks; I have reproduced this behaviour for hours; I have extensivelly researched for hours on the web; Process Monitor's collected and filtered data

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  • NFS confusion - writing many small files

    - by Antonis Christofides
    I have a Debian squeeze amd64 which is at the same time a NFS4 server and client (it mounts itself through NFS4). The local directory that leads directly to disk is /nfs4exports/mydir, whereas /nfs4mounts/mydir is the same thing mounted through NFS, using the machine's external IP address. Here is the line from fstab: 176.9.116.102:/mydir /nfs4mounts/mydir nfs4 soft 0 0 I have an application that writes many small files. If I write directly to /nfs4exports/mydir, it writes thousands of files per second; but if I write to /nfs4mounts/mydir, it writes 4 files per second or so. I can greatly increase speed if I add async to /etc/exports. (Writing a single large file to the NFS directory goes at more than 100 MB/s.) I am confused by the description of async in NFS. If my application accesses the local directory, system calls like write and close return even if caches have not been flushed to permanent storage. Apparently this is not true with NFS sync behaviour. However, with NFS async behaviour, even calls like fsync are ignored. Isn't it possible to work like local files, i.e. generally work asynchronously, but honour fsync and O_SYNC?

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  • E-mail duplication problem

    - by Gavin Osborn
    I have taken out a hosting agreement with a well respected hosting provider for a couple of internet facing servers. We have deployed several applications to these servers which send various e-mails back to us for reporting purposes. Context: Each server runs Windows Server 2003 R2 with the IIS 6.0 SMTP service installed. Each application is configured to use the local instance of IIS to send e-mails. The external IP address of each server is mapped to a particular domain eg: server1.mydomain.com server2.mydomain.com These e-mails are sent from a company domain name and not the domain name of the hosted servers (eg: [email protected]) Symptoms: A small number (<1%) of e-mails sent from these applications appear to be duplicated. These are exact duplicate in terms of both content and message headers. The Fix: I contacted my hosting provider and they told me this was a common problem & instructed me to: Change the HELO response of your mail server service to a FQDN (server1.mydomain.com && server2.mydomain.com) Create a DNS A record that resolves the FQDN of your mail server to the primary IP address of your sending mail server. Create a PTR record that resolves your primary IP address back to your mail server's FQDN In the sending domain's (mycompanydomain.com) DNS zone file, add the appropriate SPF record for your hosted servers. eg: v=spf1 a mx include:mydomain -all The Problem Continues: I made all of the changes as prescribed above, I was a little hesitant because these steps seemed to suggest they were more for stopping your messages getting blocked than they were for stopping them from being duplicated - but I am certainly no expert in these matters. It has been 5 days since I applied this fix and the problem still persists. I am certain that these problems are not a bug in the software because they are 4 different applications installed on 2 different servers, all of whom are exhibiting this strange behaviour. This behaviour has also not been seen in our UAT environment. Were my hosts correct to suggest this fix? If not, does anyone know what could be the cause of this problem? Many Thanks

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  • HTTPS/HTTP redirects via .htaccess

    - by Winston
    I have a somehow complicated problem I am trying to solve. I've used the following .htaccess directive to enable some sort of Pretty URLs, and that worked fine. For example, http://myurl.com/shop would be redirected to http://myurl.com/index.php/shop, and that was well working (note that stuff such as myurl.com/css/mycss.css) does not get redirected: RewriteEngine on RewriteCond ${REQUEST_URI} !^(index\.php$) RewriteCond %{SCRIPT_FILENAME} !-f RewriteCond %{SCRIPT_FILENAME} !-d RewriteRule ^/?(.*)$ index.php/$1 [L] But now, as I have introduced SSL to my webpage, I want the following behaviour: I basically want the above behaviour for all pages except admin.php and login.php. Requests to those two pages should be redirected to the HTTPS part, whereas all other requests should be processed as specified above. I have come up with the following .htaccess, but it does not work. h*tps://myurl.com/shop does not get redirected to h*tp://myurl.com/index.php/shop, and h*tp://myurl.com/admin.php does not get redirected to h*tps://myurl.com/admin.php. RewriteEngine on RewriteCond %{HTTPS} on RewriteCond %{REQUEST_URI} !^(admin\.php$|login\.php$) RewriteRule ^(.*)$ http://%{HTTP_HOST}/${REQUEST_URI} [R=301,L] RewriteCond %{HTTPS} off RewriteCond %{REQUEST_URI} ^(admin\.php$|login\.php$) RewriteRule ^(.*)$ https://myurl.com/%{REQUEST_URI} [R=301,L] RewriteCond %{REQUEST_URI} !^(index\.php$) RewriteCond %{SCRIPT_FILENAME} !-f RewriteCond %{SCRIPT_FILENAME} !-d RewriteRule ^/?(.*)$ index.php/$1 [L] I know it has something to do with rules overwriting each other, but I am not sure since my knowledge of Apache is quite limited. How could I fix this apparently not that difficult problem, and how could I make my .htaccess more compact and elegant? Help is very much appreciated, thank you!

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  • IPv6 working fine, IPv4 throws OpenSSL error

    - by jippie
    I am building a webserver ( http://blog.linformatronics.nl/ ), which functions just fine on both IPv4 and IPv6 and when using a non-SSL connection. However when I connect to it through https, IPv6 works as expected, but an IPv4 connection throws a client side error. Server side logs are empty for the IPv4/https connection. Summarized in a table: | http | https -----+-------+------------------------------------------------------- IPv4 | works | OpenSSL error, failed. No server side logging. -----+-------+------------------------------------------------------- IPv6 | works | self signed certificate warning, but works as expected Apparently the SSL tunnel isn't even set up, which accounts for the Apache logs being empty. But why does it work fine for IPv6 and fail for IPv4? My question is why is this OpenSSL error being thrown and how can I solve it? Below is some extra information about the setup. IPv6 https Command used to reproduce IPv6/https behaviour: $ wget --no-check-certificate -O /dev/null -6 https://blog.linformatronics.nl --2012-11-03 15:46:48-- https://blog.linformatronics.nl/ Resolving blog.linformatronics.nl (blog.linformatronics.nl)... 2001:980:1b7f:1:a00:27ff:fea6:a2e7 Connecting to blog.linformatronics.nl (blog.linformatronics.nl)|2001:980:1b7f:1:a00:27ff:fea6:a2e7|:443... connected. WARNING: cannot verify blog.linformatronics.nl's certificate, issued by `/CN=localhost': Self-signed certificate encountered. WARNING: certificate common name `localhost' doesn't match requested host name `blog.linformatronics.nl'. HTTP request sent, awaiting response... 200 OK Length: 4556 (4.4K) [text/html] Saving to: `/dev/null' 100%[=======================================================================>] 4,556 --.-K/s in 0s 2012-11-03 15:46:49 (62.5 MB/s) - `/dev/null' saved [4556/4556] IPv4 https Command used to reproduce IPv6/https behaviour: $ wget --no-check-certificate -O /dev/null -4 https://blog.linformatronics.nl --2012-11-03 15:47:28-- https://blog.linformatronics.nl/ Resolving blog.linformatronics.nl (blog.linformatronics.nl)... 82.95.251.247 Connecting to blog.linformatronics.nl (blog.linformatronics.nl)|82.95.251.247|:443... connected. OpenSSL: error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol Unable to establish SSL connection. Notes I am on Ubuntu Server 12.04.1 LTS

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  • D-LINK DIR-615 router keeps giving my wireless devices bad ip addresses

    - by mlsteeves
    I have a D-LINK DIR-615 router, and wired devices have no problem getting an IP, however; wireless devices end up with a 169.254.. address (subsequently, they cannot access the internet through the router). I have removed all wired connections from the router, so there is no other dhcp server running. I've also gone back to the store, and replaced it with another, thinking that maybe it was defective. According to the router, it gave 192.168.0.101 to the wireless device. According to the wireless device it got 169.254.67.71. I've tried both a laptop and an iPod Touch, both exhibit the same behaviour. Has anyone seen this type of behaviour, or have any ideas of stuff to try? NEW INFORMATION I looked at the logs on the router, and when the wireless device tries to connect, this is what is logged: Sep 10 18:13:39 UDHCPD sending OFFER of 192.168.0.111 Sep 10 18:13:31 UDHCPD sending OFFER of 192.168.0.111 Sep 10 18:13:26 UDHCPD sending OFFER of 192.168.0.111 Sep 10 18:13:23 UDHCPD sending OFFER of 192.168.0.111 Sep 10 18:13:21 UDHCPD sending OFFER of 192.168.0.111 I connected a computer directly to the router, and here is what it looks like: Sep 10 18:14:18 UDHCPD Inform: add_lease 192.168.0.110 Sep 10 18:14:14 UDHCPD sending ACK to 192.168.0.110 Sep 10 18:14:14 UDHCPD sending OFFER of 192.168.0.110 Not sure if that helps or not.

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  • Queries passed to SQL Server are getting corrupted

    - by adrianbanks
    We are experiencing a bizarre error with our application at a customer site. We have managed to narrow it down to the point where we can replicate the behaviour using just Management Studio and SQL Server. We have two machines, A and B: +------------+ +--------------------+ | [A] | | [B] | | Management | -------------- | SQL Server 2008 R2 | | Studio | | Enterprise x64 | +------------+ +--------------------+ We are running a SQL script in Management Studio on machine A against the SQL Server instance on machine B. We are not actually executing the script, just parsing it. Most of the time, the parse operation works fine. Occasionally (seemingly randomly), the parse operation fails with a syntax error. The error message shows the part of the script with the error, which appears as some SQL from the original script that has been truncated and has random characters appended to it. An example: The original SQL: SELECT DISTINCT ST.TABLE_NAME as TableName FROM INFORMATION_SCHEMA.TABLES AS ST INNER JOIN INFORMATION_SCHEMA.COLUMNS AS SC ON SC.TABLE_NAME = ST.TABLE_NAME WHERE ST.TABLE_TYPE = 'BASE TABLE' AND SC.COLUMN_NAME = 'Identity' AND ST.TABLE_NAME != 'dtproperties' ORDER BY ST.TABLE_NAME The SQL that is in error (as reported by SQL Server): SELECT DISTINCT ST.TABLE_NAME as TableName FROM INFORMATION_SCHEMA.TABLES AS ST INNER JOIN INFORMATION_SCHEMA.COLUMNS AS SC ON SC.TABLE_NAME = Sa? The above example shows how the query is being corrupted. It doesn't always happen, and is not always the same bit of SQL that causes the error. Parsing this script against another SQL Server instance produces no errors, showing that the script is fine. It appears that something is corrupting the SQL that is being received the the server. This leads me to think that the problem lies either with the client end or in the transmission of the SQL from the client to the server. I have a SQL trace from the period where an error occurs, which shows the SQL has been corrupted when SQL Server receives it. We have been unable to track down any possible cause of this behaviour, and so cannot find a fix. Because the errors occur seemingly randomly, it is also very hard to generate reproduction steps to submit a bug report. Any ideas?

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  • Scripting a permanent CTRL / CAPS swap in Gnome?

    - by Duncan Bayne
    I have a bash script that I use to configure a vanilla Ubuntu (10.10 Maverick Meerkat) installation to be exactly the way I want it. I make extensive use of gconftool-2 to configure the desktop, set up shortcut keys, etc. Now, I'm trying to swap the CTRL and CAPS keys. I have found two ways of doing this: In Gnome, go to System - Preferences - Keyboard - Layout - Options and make the change in there. This works well, but I don't know how to script this; the setting doesn't seem to be stored in the usual place as I can't find it with gconf-editor. Add the line setxkbmap -option "ctrl:swapcaps" to my .bashrc file. That works too, until I suspend the machine & then resume it. At that point the CTRL and CAPS behaviour return to normal, until I cause .bashrc to be run again by opening a new shell. This behaviour has been reported as a bug in RedHat. Could someone please suggest a way of switching those keys that is both permanent, and can be scripted? I'm sure I must be missing something obvious here ...

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  • Host system resets (crashes) when using VMWare or VirtualBox and 64-bit guest systems

    - by sinni800
    I have been trying to install virtual systems on VMWare for a while now and encountered strange behaviour from my PC. The behaviour is as follows: On "automatic" virtualization mode it either outputs a cryptic error message (can MAYBE give later, if I can reproduce) right on startup (before even the BIOS) or it resets the complete HOST system (blackscreen, bios...) If I install a Windows XP on it it works well on "binary translation" mode. If I try installing Linux on it, in "binary translation" mode it crashes 1 or 2 seconds after I hit enter on the GRUB selection screen (after the first page of kernel messages rolled in) Using VirtualBox it crashes right in the BIOS. It gave me a Bluescreen though! 0x00000101: CLOCK_WATCHDOG_TIMEOUT: a clock interrupt was not received on a secondary processor within the allocated time interval NEWS: I tried VirtualBox again and it did not completely crash the computer this time. It gave me a critical error and a log file: http://pastebin.com/yKZSDs91 In conclusion, it will crash instantly if VT-x is activated. If not, it seemingly only crashed if I try to install something with 64 bits. Another update: Yes, it ONLY crashes when the guest is 64 bit! What I tried: Reinstalling Windows (my Windows installation was quite broken so it seemed natural. Didn't work though.) New BIOS What I am certain of: Virtualization extensions are activated in the BIOS What my computer specs are: ASUS P8P67 LE mainboard, newest BIOS/EFI firmware Intel Core i5 2500k Ati Radeon HD 5770 16 GB Corsair 1333mhz DDR3 RAM, 4 X 4 GB

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  • XP - ping changes routing table?

    - by Corelgott
    Hey Folks, I have got a real strange behaviour with one of my XP-Sp3 machines. Setup: A Server in the lan (192.168.5.0) proviedes access to all roadwarriors in 10.8.0.0 The DCHP has a static route for all clients pronouncing 192.168.5.235 as gateway for 10.8.0.0 All Clients can ping & access the vpn-machines; everything works like a charm But one Xp-Sp3 is not willing to connect to them. It gets all the same routes as any other sytem in the lan and I trippel-checked - there are no static routes on this machine When I ping any 10.8.0.0 device from this machine, the first two packaged work like a charm; but the next two (and any package after them) fail and get lost. When I look back into the routing table: There is a new route; a special one just for the device I pinged, which points to the right gateway - but which wasn't there earlier... As Long as this route exists the machine can't ping anything on 10.8.0.0. But if I remove the route by hand: The next to ping packages work fine... Has anybody got an idea about that? Anybody every seen such a behaviour? Any hint / help / tip is greatly appreachiated! thx in advance Corelgott Ps: I attach an image of the cmd to clarify things - its in german, but reading a routing table shouldn't be that hard...

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  • Magical moving desktop icons

    - by Nathan Taylor
    I have encountered a very strange behavior in Windows 7 that I cannot seem to identify and I have never seen or heard of on any system configuration. Whenever I move my mouse to the left-most edge of my primary display (centered in 3-display setup), my desktop icons magically move away from the cursor (up or down and to the right). It only happens when my desktop has focus and the mouse is positioned on the left, top or bottom edge of the main display. Moving the mouse all the way to the right edge of my right secondary display causes the mouse icons to snap back into their correct position. Ridiculous video of the issue My setup is 3 displays on two display adapters. The main display is running at 2560x1600, connected to the machine via a USB-powered DVI-D to DisplayPort adapter and is driven by an NVIDIA NVS 3100M video card. The secondary displays are running at 1440x900 and 1200x1920 and are driven by integrated Intel HD Graphics (mobile). It seems like some kind of panning behavior, but it's obviously not working as expected. I have updated all of my drivers, but no change. It's probably worth noting that the desktop icons are set to auto-arrange.

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  • Windows 7 - SBS - Why does copying a directory not include all subdirectories and files?

    - by indeed005
    Using Windows 7, fully updated... I have had some strange behaviour copying a whole user directory (e.g. "c:\users\bob" to "c:\backups\bob") I understand now that I should have used Easy Transfer or at least robocopy, but at the time all I wanted to do was backup the user's data before using the "Delete account" button. Unfortunately, I didn't check that my copy-paste had actually worked; all it had actually done was copied the appdata subdirectory of the user account. At the time of doing this backup I was logged in as the same user, bob (a local admin) in this example. When I discovered the missing files, I tried again using the domain admin account -- same story. Only appdata copied. No documents folders, nothing else. Then my boss tried, and it worked fine -- it copied all the files. Ctrl+C, Ctrl+V. I tried again... same profile... copied all the files. Same profile, same destination, same rights and permissions, same ownership, but different behaviour. Has anyone encountered this before and come up with a solution? BTW this was not using roaming profiles and the accounts are stored locally.

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  • FTP Server upload and filesystem questions

    - by Alex
    I'm a photographer who mainly does event photography. A while ago I bought myself a Nikon WT-4 wireless transmitter, a small device which connects via USB to my Nikon D700 DSLR, and then establishes a WiFi connection to an existing WLAN. It can then upload any pictures I take via FTP to an FTP server somewhere in the network. On my laptop I then have a piece of software which will check a given folder on the disk regularly, this software is smart enough to look at the modified file timestamp, if this timestamp is less than 10 seconds ago, it will not attempt to import the folder and skip the file in this iteration of the import scan. The problem I've discovered seems to be inherent to the FTP protocol, as I have the same problem with Windows 7 built in IIS server, as I do with FileZilla FTP server. When the transmitter starts to upload a file, the FTP server will create a small 300-500 KB file with the correct filename on the disk, but then do nothing with the file until it has completely received the file via FTP. So it seems to create this small dummy file, and then buffer the remainder of the FTP upload until it's finished, and then dump the rest of the file into the dummy file making it the correct size. Problem is, these uploads take about 15-30 seconds depending on reception, but since the folder watch tool will already try to import any file older than 10 seconds, it will always try to import the small dummy files which obviously fails as they're not copmlete yet. Is there any way to 'disable' this behaviour? Ideally I would like my file only to show up once it's been completely uploaded. Or perhaps someone knows another FTP server application (it has to run on win7) which does not show this behaviour?

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  • Input/output error reading USB backup drive on CentOS 6.4

    - by Kev
    I'm suddenly seeing some strange behaviour on our USB backup drive that doesn't make sense to me: (2013-10-21 14:58:23 [root@newdc /]$ cd /mnt/backup/ (2013-10-21 14:59:03 [root@newdc backup]$ ls -la ls: reading directory .: Input/output error total 0 (2013-10-21 14:59:05 [root@newdc backup]$ df -h /mnt/backup Filesystem Size Used Avail Use% Mounted on /dev/sda1 917G 843G 28G 97% /mnt/backup How is it possible for the OS to know how much is in use, but I can't ls any of it as root? Or more to the point, what problem does this indicate? /var/log/messages said this: Oct 21 14:57:54 g5 kernel: EXT4-fs error (device sda1): ext4_journal_start_sb: Detected aborted journal Oct 21 14:57:54 g5 kernel: EXT4-fs (sda1): Remounting filesystem read-only But...read-only is something different than 'throw an io error'... After unmounting to try fsck on it, I had someone on-site look at it, and the drive was not spun up, and had a slow-flashing light, which I believe means it was in a power-suspend mode. So I had them unplug and replug the USB cable, and now (before remounting) it says: fsck from util-linux-ng 2.17.2 e2fsck 1.41.12 (17-May-2010) /dev/sda1: clean, 2805106/61046784 files, 181934167/244182016 blocks I then mount it and now ls works and df reports: Filesystem Size Used Avail Use% Mounted on /dev/sda1 917G 680G 191G 79% /mnt/backup What would cause it to go into such a state without being asked to? Why all the weird behaviour, and now it appears to not be corrupt?

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  • Windows Server 2008 R2 grinds to a screeching halt during file copy operations

    - by skolima
    When my Windows Server 2008 R2 machine is performing any large disk operations (copying 10GB files from one drive to another, copying similar file over network, merging HyperV snapshots, compressing large files), performance of the whole machine slows down terribly, everything becomes unresponsive. This is noticeable in any situation when the disk access is large enough not to fit in the cache. Are there any settings available for tuning this behaviour? I can accept slower file transfer if this would give me more responsiveness. System details: Dell Optiflex 960, Core 2 Quad Q9650, 8GB RAM, 2 SATA drives - 320GB (ST3320418AS) and 1TB (ST31000528AS), NCQ active on both, Intel 82564LM-3 Gigabit Ethernet, ATI HD 3450 graphics, Intel ICH10 bridge. We have multiple machines like this, every one is exhibiting the same behaviour. I though this was overkill for a workstation, apparently I was mistaken. Update: I guess I shouldn't have mentioned the HyperV at all. The above configuration is a standard workstation setup at the company I work for, this is not a server of any kind. I have at most 3 virtual machines working, and usually I'm the only person accessing them. Never the less, the slowdown occurs even when no VMs are running. On a Linux machine I'd simply ionice the copy process and I could forget about it, is there any way to manage IO priorities on Windows?

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  • How to prevent the command prompt from closing after execution?

    - by Sk8erPeter
    My problem is that in Windows, there are command line windows that close immediately after execution. To solve this, I want the default behavior to be that the window is kept open. Normally, this behavior can be avoided with three methods that come to my mind: Putting a pause line after batch programs to prompt the user to press a key before exiting Running these batch files or other command line manipulating tools (even service starting, restarting, etc. with net start xy or anything similar) within cmd.exe(Start - Run - cmd.exe) Running these programs with cmd /k like this: cmd /k myprogram.bat But there are some other cases in which the user: Runs the program the first time and doesn't know that the given program will run in Command Prompt (Windows Command Processor) e.g. when running a shortcut from Start menu (or from somewhere else), OR Finds it a little bit uncomfortable to run cmd.exe all the time and doesn't have the time/opportunity to rewrite the code of these commands everywhere to put a pause after them or avoid exiting explicitly. I've read an article about changing default behavior of cmd.exe when opening it explicitly, with creating an AutoRun entry and manipulating its content in these locations: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Command Processor\AutoRun HKEY_CURRENT_USER\SOFTWARE\Microsoft\Command Processor\AutoRun (The AutoRun items are _String values_...) I put cmd /d /k as a value of it to give it a try, but this didn't change the behaviour of the stuffs mentioned above at all... It just changed the behaviour of the command line window when opening it explicitly (Start-Run-cmd.exe). So how does it work? Can you give me any ideas to solve this problem?

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  • The Definitive C++ Book Guide and List

    - by grepsedawk
    After more than a few questions about deciding on C++ books I thought we could make a better community wiki version. Providing QUALITY books and an approximate skill level. Maybe we can add a short blurb/description about each book that you have personally read / benefited from. Feel free to debate quality, headings, etc. Note: There is a similar post for C: The Definitive C Book Guide and List Reference Style - All Levels The C++ Programming Language - Bjarne Stroustrup C++ Standard Library Tutorial and Reference - Nicolai Josuttis Beginner Introductory: C++ Primer - Stanley Lippman / Josée Lajoie / Barbara E. Moo Accelerated C++ - Andrew Koenig / Barbara Moo Thinking in C++ - Bruce Eckel (2 volumes, 2nd is more about standard library, but still very good) Best practices: Effective C++ - Scott Meyers Effective STL - Scott Meyers Intermediate More Effective C++ - Scott Meyers Exceptional C++ - Herb Sutter More Exceptional C++ - Herb Sutter C++ Coding Standards: 101 Rules, Guidelines, and Best Practices - Herb Sutter / Andrei Alexandrescu C++ Templates The Complete Guide - David Vandevoorde / Nicolai M. Josuttis Large Scale C++ Software Design - John Lakos Above Intermediate Modern C++ Design - Andrei Alexandrescu C++ Template Metaprogramming - David Abrahams and Aleksey Gurtovoy Inside the C++ Object Model - Stanley Lippman Classics / Older Note: Some information contained within these books may not be up to date and no longer considered best practice. The Design and Evolution of C++ - Bjarne Stroustrup Ruminations on C++ Andrew Koenig / Barbara Moo Advanced C++ Programming Styles and Idioms - James Coplien

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  • Unable to regress web application from AJAX Control Toolkit 3.0 back to 1.0

    - by David Neale
    I was recently asked to stop using the Ajax Control Toolkit 3.0 in my application and need to go back to 1.0. Luckily I only have one calendar control which I don't believe will be affected by this. I have removed the reference to the 3.0 .dll and added a reference to the 1.0 .dll. These are the assemblies in web.config: <assemblies> <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> <add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> <add assembly="System.Web.Extensions.Design, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add assembly="System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/> <add assembly="System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/></assemblies> and this also also there: <runtime> <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly> <assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35"/> <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35"/> <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/> </dependentAssembly> </assemblyBinding> </runtime> I get a compile error of: Could not load file or assembly 'AjaxControlToolkit, Version=3.0.30930.28736, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

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  • Webforms MVP Passive View - event handling

    - by ss2k
    Should the view have nothing event specific in its interface and call the presenter plain methods to handle events and not have any official EventHandlers? For instance // ASPX protected void OnSaveButtonClicked(object sender, EventArgs e) { _Presenter.OnSave(); } Or should the view have event EventHandlers defined in its interface and link those up explicitly to control events on the page // View public interface IView { ... event EventHandler Saved; ... } // ASPX Page implementing the view protected override void OnInit(EventArgs e) { base.OnInit(e); SaveButton.Click += delegate { Saved(this, e); }; } // Presenter internal Presenter(IView view,IRepository repository) { _view = view; _repository = repository; view.Saved += Save; } The second seems like a whole lot of plumbing code to add all over. My intention is to understand the benefits of each style and not just a blanket answer of which to use. My main goals is clarity and high value testability. Testability overall is important, but I wouldn't sacrifice design simplicity and clarity to be able to add another type of test that doesn't lead to too much gain over the test cases already possible with a simpler design. If a design choice does off more testability please include an example (pseudo code is fine) of the type of test it can now offer so I can make my decision if I value that type of extra test enough. Thanks!

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