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• SQL Azure Security: DoS

  - by Herve Roggero

  Since I decided to understand in more depth how SQL Azure works I started to dig into its performance characteristics. So I decided to write an application that allows me to put SQL Azure to the test and compare results with a local SQL Server database. One of the options I added is the ability to issue the same command on multiple threads to get certain performance metrics. That's when I stumbled on an interesting security feature of SQL Azure: its Denial of Service (DoS) detection engine. What this security feature does is that it performs a check on the number of connections being established, and if the rate of connection is too high, SQL Azure blocks all communication from that machine. I am still trying to learn more about this specific feature, but it appears that going to the SQL Azure portal and testing the connection from the portal "resets" the feature and you are allowed to connect again... until you reach the login threashold. In the specific test I was performing, all the logins were successful. I haven't tried to login with an invalid account or password... that will be for next time. On my Linked In group (SQL Server and SQL Azure Security: http://www.linkedin.com/groups?gid=2569994&trk=hb_side_g) Chip Andrews (www.sqlsecurity.com) pointed out that this feature in itself could present an internal threat. In theory, a rogue application could be issuing many login requests from a NATed network, which could potentially prevent any production system from connecting to SQL Azure within the same network. My initial response was that this could indeed be the case. However, while the TCP protocol contains the latest NATed IP address of a machine (which masks the origin of the machine making the SQL request), the TDS protocol itself contains the IP Address of the machine making the initial request; so technically there would be a way for SQL Azure to block only the internal IP address making the rogue requests.  So this warrants further investigation... stay tuned...

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• Level editor event system, how to translate event to game action

  - by Martino Wullems

  Hello, I've been busy trying to create a level editor for a tile based game i'm working on. It's all going pretty fine, the only thing i'm having trouble with is creating a simple event system. Let's say the player steps on a particulair tile that had the action "teleport" assigned to it in the editor. The teleport string is saved in the tile object as a variable. When creating the tilegrid an actionmanager class scans the action variable and assigns actions to the variable. public static class ActionManager { public static function ParseTileAction(tile:Tile) { switch(tile.action) { case "TELEPORT": //assign action here break; } } } Now this is an collision event, so I guess I should also provide an object to colide with the tile. But what if it would have to count for collision with all objects in the world? Also, checking for collisions in the actionmanager class doesn't seem very efficient. Am I even on the right track here? I'm new to game design so I could be completly off track. Any tips on how handeling and creating events using an editor is usually done would be great. The main problem i'm having is the Thanks in advance.

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• How to reset display settings in XFCE \ Ubuntu 12.04 and also flgrx drivers

  - by Agent24

  I recently upgraded to Ubuntu 12.04 and since I hate unity I installed the Xubuntu package and am using XFCE instead. Since I have a Radeon HD5770 I also installed the fglrx drivers. This all went fine (aside from the fact that the post-release update fglrx drivers have an error on installation and Ubuntu thinks they're not installed when they actually are. I configured my display settings (dual monitors, a 17" CRT on VGA and a 17" LCD on DVI) in the amdcccle program and everything was perfect. THEN, 2 days ago, I accidentally clicked on the "Display" settings in XFCE "settings" manager. After that, everything got screwed. Now, I normally run the CRT at 1152x854 and the LCD at 1280x1024 with the CRT as my primary monitor (with panel) and the LCD without panels etc just to display other windows when I want to drag them over there. The problem is now that if I set my CRT to 1152x864, it stays at 1280x1024 virtually and half the stuff falls off the screen. It also puts the LCD at 1280x1024 BUT then overlays the CRT's display ontop with different wallpaper in an L shape down the right-hand and bottom edges. In short, nothing makes sense and everything is FUBAR. I tried uninstalling fglrx through synaptic, and renaming xorg.conf and also the xfce XML file that has monitor settings but it still won't make sense. Unity on the other hand can currently set everything normally so the problem appears to be only with XFCE. In any case, I can't even get the fglrx drivers back, when I re-installed them, I can't run amdccle anymore as it says the driver isn't installed!! Can someone help me reset my XFCE settings so the monitors aren't screwed with some incorrect virtual desktop size and also so I can get fglrx drivers back and working? I really don't want to have to format and reinstall and go through all the hassle but it looks like I may have to :(

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• Run one virtual machine on a Linux server + standard Linux functions

  - by fistameeny

  Hi, I am looking for a method to setup a Linux server (running Ubuntu Server) that uses Samba for file sharing, as well as hosting a Windows virtual machine (in this case, Windows Small Business Server 2003, which in turn hosts SQL Server Express - Exchange won't be used on this). I would like to have the Linux server serving the files over Samba, and hosting the Virtual Machine. This obviously rules ESXi out as it couldn't do Samba at the same time. What would be the next best solution to give reasonable speed? Vmware Server 2.0, VirtualBox, Xen? There will be 10-15 users accessing the Samba shares and the SQL Express virtual machine. Matt

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• Getting a double slash when redirecting for a canonical hostname on Firefox only

  - by Brian Neal

  I have a Django powered website, and I'm trying to solve the "canonical hostname" problem. I want www.example.com to redirect to example.com. I have tried both techniques found in the Apache documentation here (scroll down to Canonical hostnames). I'm currently trying the mod_rewrite method, and I have this in a virtual host container: RewriteEngine on RewriteCond %{HTTP_HOST} ^www\.example\.com$ [NC] RewriteRule ^/?(.*)$ http://example.com/$1 [L,R=301,NE] This works for me, except for one case. In Firefox only, if I type www.example.com in a browser, it redirects and I see this in the URL bar: example.com// (note the 2 trailing slashes). However, something like this will work correctly: www.example.com/news/ gets redirected to example.com/news/. I only see this on the root URL in Firefox. It seems to work fine on Windows under Chrome, IE9, and Opera (maybe those browsers eat the double slash?). My Mac using friend says it is fine in Safari, but he also sees the problem in Firefox. As far as Django settings go, I am using the default value of APPEND_SLASH=True. I don't know if Django has anything to do with it, but I've tried mod_rewrite rules like the above on static HTML sites before and it always seems to work.

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• Is it possible to shutdown a remote computer running Windows 7 via Telnet?

  - by Ryan Shripat

  I've successfully connected to my Windows 7 desktop over wifi via Telnet from an XP Home netbook. To login, I use the following command: telnet -l "win7desktop\win7user" win7desktop win7user in this case is an Administrator on win7desktop and is also a member of the Telnet Clients Group. The problem I have is that when I attempt to shut down win7desktop by issuing the following command: shutdown /s ...at the Telnet prompt, I get an Access Denied error: Access is denied.(5) Is it possible to shutdown a remote computer running Windows 7 via Telnet? If so, what do I need to do to get around the Access is denied error?

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• Why do strace/truss sometimes 'fix' stuck processes?

  - by Emmel

  Sometimes you have a stuck process that's been stuck for a while, and as soon as you go to poke at it with strace/truss just to see what's going on, it gets magically unstuck and continues to run! So from merely 'observing' these programs have some impact in the running of the stuck programs .. what's happening here? Did strace (I guess via ptrace(2)?) send a signal, causing the program to cease blocking, or such? I've seen this several times -- most recently on Linux RHEL 4 (and a Perl script mucking with processes and doing some network IO in that case), but in a few other contexts as well. Unfortunately, I can't reproduce this, as it times to happen ... in times of crisis. But my curiosity remains. :-) Any elucidation appreciated.

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• Problem with WCF-SQL Adapter

  - by Paul Petrov

  When using WCF receive adapter with SQL binding in Polling mode please be aware of the following problem. Problem: At some regular but seemingly random intervals the application stops processing new requests, places a lock on the database and prevent other application from accessing it. Initially it looked like DTC issue, as it was distributed transaction that stalled most of the time. Symptoms: Orchestration instances in Dehydrated state, receive location not picking up new messages, exclusive locks on database tables, errors in DTC trace. Cause: Microsoft has confirmed that there is a bug in the WCF-SQL adapter. In the receive adapter binding configuration there's receiveTimeout property set to 10 minutes by default. If during this period data is not found in the table the adapter would start new thread and allocate more memory without releasing old resources. Thus if there's no new data in the table for a long time a new thread will be created in the host instance every 10 minutes until it reaches threshold (1000) and then there's no threads left for this host instance and it can't start/complete any tasks. Then this host instance won't be able to do anything. If other artifacts are hosted in the instance they will suffer consequences as well. Solution: - Set receiveTimeout to the maximum time 24.20:31:23.6470000. - Place WCF-SQL receive locations in separate host to provide its own thread pool and eliminate impact on other processes - Ensure WCF-SQL dedicated host instances are restarted at interval less or equal to receiveTimeout to flush threads and memory - Monitor performance counters Process/Thread Count/BTSNTSvc{n} for thread count trend and respond to alert if it grows by restarting host instance If you use WCF-SQL Adapter in the Notification mode then make sure to remove sqlAdapterInboundTransactionBehavior otherwise this location will exhibit the same issue. In this case though, setting receiveTimeout doesn't help and new thread will be created at default intervals (10 min) ignoring maximum setting.

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• Backup Exec 12.5 or 2010? [closed]

  - by Chris Thorpe

  Backup Exec 2010 has just dropped, and I'm about to implement a new BEWS infrastructure, complete with CALs and new central servers. When I specced this up last year, I ignored 2010 and focused on Backup Exec 12.5, since it's a mature product. In previous experience, major released of BE had numerous technical issues and seemed to improve significantly at the first service pack. However, our refresh cycle on the backup infrastructure is slow, the main driver usually being lack of support for some new server type (in this case, ESX has driven our current upgrade need). With this in mind, I'm wondering if Backup Exec 2010 should be my first choice, as it'll last longer under current support than 12.5, which will approach EOL soon. Has anyone got any perspective they could add to this? Right now, I'm leaning towards biting the bullet and going with 2010.

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• Ubuntu: Take actions when system temperature gets too high

  - by Josh

  One of the CPU fans on my Compaq Presario laptop running Ubuntu 9.10 seems to have bit the dust. The fan is deep within the case and I intend to replace the laptop in the next 6 months so it's not worth replacing it. I have the laptop on a cooling pad and most of the time the system is fine, CPU temps around 90°-110°F. Occasionally, however, I'm seeing random lockups which I believe is due to the system overheating. How can I configure the system to: Lower the CPU speed when the temperature reaches a certain level? (I.E. 110°F) Shutdown the system when the tempature reaches a critical level? (And what would that be? 130°?)

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• How to create a "retro" pixel shader for transformed 2D sprites that maintains pixel fidelity?

  - by David Gouveia

  The image below shows two sprites rendered with point sampling on top of a background: The left skull has no rotation/scaling applied to it, so every pixel matches perfectly with the background. The right skull is rotated/scaled, and this results in larger pixels that are no longer axis aligned. How could I develop a pixel shader that would render the transformed sprite on the right with axis aligned pixels of the same size as the rest of the scene? This might be related to how sprite scaling was implemented in old games such as Monkey Island, because that's the effect I'm trying to achieve, but with rotation added. Edit As per kaoD's suggestions, I tried to address the problem as a post-process. The easiest approach was to render to a separate render target first (downsampled to match the desired pixel size) and then upscale it when rendering a second time. It did address my requirements above. First I tried doing it Linear -> Point and the result was this: There's no distortion but the result looks blurred and it loses most of the highlights colors. In my opinion it breaks the retro look I needed. The second time I tried Point -> Point and the result was this: Despite the distortion, I think that might be good enough for my needs, although it does look better as a still image than in motion. To demonstrate, here's a video of the effect, although YouTube filtered the pixels out of it: http://youtu.be/hqokk58KFmI However, I'll leave the question open for a few more days in case someone comes up with a better sampling solution that maintains the crisp look while decreasing the amount of distortion when moving.

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• Custom prompt doesn't work on Mac's terminal

  - by mareks

  I like to use a custom prompt (current path in blue) on my unix machine: export PS1='\[\e[0;34m\]\w \$\[\e[m\] ' But when I try to use it on Mac's terminal it doesn't work: it fails to detect the end of the prompt and overwrites the prompt when I type commands. This also happens when I'm inputting a long command where it wraps over the same line instead of starting a new line. I don't understand why this is the case since I use bash on both machines. Any suggestions on how to remedy this?

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• What is a Linux device name for RAID of sas drives?

  - by flashnik

  I have a RAID1 using Promise FastTrack TX2650 consisting of 2 SAS drives. What is a Linux device name for them? Like sda is for first sata drive. I have Windows server so I can't look it directly but need this information for smartctl usage. UPDATE. I found how to access RAID: smartctl -d scsi sdb (because I also have a SATA drive). But in this case I just get an information about just raid controller though I wantto get information about drives itself. Is it possible? Promises's control panel provides information only about their healthy status (boolean) and I want more. Mostly now I need information about temperature.

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• Start a screen through svcadm with Solaris 11

  - by Sephreph

  I am running into a problem when trying to start a detached screen through a Solaris 11 service. This service controls nginx. When I reboot the system, the screen doesn't start, but if I issue svcadm disable nginx then svcadm enable nginx manually, it does. The rest of the init script functions correctly on a reboot (the nginx daemon starts, etc). The part of the service that triggers the screen looks like this: case "$1" in start) echo "Starting Nginx Logger: \c" /usr/bin/screen -S nginxLogger -d -m /opt/php-5.3.10/bin/php $loggingProg LogRetVal=$? [ $LogRetVal -eq 0 ] & echo "ok" || echo "failed" .... The log (/var/svc/log/network-nginx\:default.log) shows that $LogRetVal is returning 0, and $loggingProg is just pointing to a PHP script. If it matters, when I manually restart the service, I'm logged in as root. I'm unsure how to check if it's a permission issue (I'm new to Solaris, I've recently switched from CentOS/RHEL).

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• windows 7 64bit rc with SSD saving problem

  - by Tariq

  Hi All, I have this problem where, in any application, 95% of the time when i try to save it pops up with a "Save As" dialogue. And if i try to select the original file i get an error popup "The operation could not be completed". I have Windows 7 RC 64bit with a X-25M SSD. I have upgraded the firmware for the SSD just in case and still the problem persists. Has anyone come across this before or know the problem? Or is there some indication i should be looking for in the event logs? Thanks

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• Using Oracle WebCenter Content for Solving Government Content-Centric Business Problems

  - by Lance Shaw

  Organizations are seeing unprecedented amounts of unstructured information such as documents, images, e-mails, and rich media files. Join us December 12th to learn about how Oracle WebCenter Content can help you provide better citizen services by managing the content lifecycle, from creation to disposition, with a single repository.  With Oracle WebCenter Content, organizations can address any content use case, such as accounts payable, HR on-boarding, document management, compliance, records management, digital asset management, or website management.  If you have multiple content silos and need a strategy for consolidating your unstructured content to reduce costs and complexity, please join us to hear from Shahid Rashid, Oracle WebCenter Development, and Oracle Pillar Partner, Fishbowl Solutions, and learn how you can create the foundation for content-centric business solutions.  •        Solve the problem of multiple content silos (content systems, file systems, workspaces) •        Fully leverage your content across applications, processes and departments •        Create a strategy for consolidating your unstructured content to reduce costs and infrastructure complexity •        Comply with regulations and provide audit trails while remaining agile •        Provide a complete and integrated solution for managing content directly from Oracle Applications (E-Business Suite, PeopleSoft, Siebel, JD Edwards) Join us on December 12th at 2pm ET, 11am PT to learn more!

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• In between multiple tabs, how to use Vimperator to open a tab after current one

  - by Mehrad

  If you're a Firefox user you know that if you have 10 tabs open and say you're in the tab #5. If you open a new tab which will become #11 in order and search something, after you finish and close this #11 tab Firefox will direct you the the last active tab you were in which is #5. Using Vimperator You won't get the similar effect. In the same scenario, while you're in tab #5 you can go t and search for something which will lead to opening a tab at #11. Now you press d and where you are now ? #10 and you need to ctrl+p all the way back to #5. So in this case I am looking for one of these solutions. to be able to open a tab straight after the current tab (which closing it will capital D will put me back to my active tab) a way to close a tab and being brought back to the last active tab that I worked on. Will appreciate it if somebody got a solution for this. thanks

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• How to Export Flash Animation Data

  - by charliep

  I'd love for my partner, the artist, to be able to animate using flash movieclips and timelines. Then I, the programmer, would like to read the raw Flash info and re-program it into my engine of choice (which happens to be Torque2D). The data I'd want is the bitmap images that were used in Flash, like the head and body the links between the images, like where the head connects to the body the motion data from the flash animation, like move, rotate (at what speed), shear, etc. for the head or arms or whatever. Is there any way to get this data? Here's what I know so far. There are tools like SWFSheet and Spriteloq that convert the entire flash animation into a frame by frame sprite animation (in a sprite sheet). This would take too much space in my case, so I'd like to avoid that. Re-animating on the fly would take much less texture memory. There is a PDF that describes the SWF file format but NOT the individual components like the movieclips. So anyone know of a library I can use, or how I can learn more about the movieclip components and whatnot? (more better tags: transform, export, convert)

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• using sed to print next line after match

  - by smokinguns

  I came across various examples on printing next line after a match, that use awk and sed. I'm using it in my code and it works fine. Now I want to use a variable instead of a hardcoded value for the pattern match. The search pattern string includes forward slashes "/". How do I use a variable that has "/" in it and use it to print the next line after the match? The following doesn't seem to work: var="/somePath/to/my/home" val=`echo -e "$someStr" | sed -n ':$var:{n;p;}'` In this case, val is always blank. I'm using using ":" as the delimiter instead of "/". I'm on a Mac OS X.

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• Only three primary partitions?

  - by ctype.h

  As everyone probably knows, Windows allows a drive to have four primary partitions, one of which may be active. However, I have only three primary partitions. I shrunk one and created a fourth partition so I could install Windows 8 on it, but Disk Management only allows it to be a logical partition. Why might this be the case? If I cannot convert it to a primary partition, is it advisable to install Windows on a logical partition? If so, is hibernation supported?

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• How to prevent 2D camera rotation if it would violate the bounds of the camera?

  - by Andrew Price

  I'm working on a Camera class and I have a rectangle field named Bounds that determines the bounds of the camera. I have it working for zooming and moving the camera so that the camera cannot exit its bounds. However, I'm a bit confused on how to do the same for rotation. Currently I allow rotating of the camera's Z-axis. However, if sufficiently zoomed out, upon rotating the camera, areas of the screen outside the camera's bounds can be shown. I'd like to deny the rotation assuming it meant that the newly rotated camera would expose areas outside the camera's bounds, but I'm not quite sure how. I'm still new to Matrix and Vector math and I'm not quite sure how to model if the newly rotated camera sees outside of its bounds, undo the rotation. Here's an image showing the problem: http://i.stack.imgur.com/NqprC.png The red is out of bounds and as a result, the camera should never be allowed to rotate itself like this. This seems like it would be a problem with all rotated values, but this is not the case when the camera is zoomed in enough. Here are the current member variables for the Camera class: private Vector2 _position = Vector2.Zero; private Vector2 _origin = Vector2.Zero; private Rectangle? _bounds = Rectangle.Empty; private float _rotation = 0.0f; private float _zoom = 1.0f; Is this possible to do? If so, could someone give me some guidance on how to accomplish this? Thanks. EDIT: I forgot to mention I am using a transformation matrix style camera that I input in to SpriteBatch.Begin. I am using the same transformation matrix from this tutorial.

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• Changing Palette for Day/Light Mode using GIMP

  - by J.C.

  Hello, Suppose I've a picture, which want to achieve day/light mode by changing 8bpp color palette. If I want the pixel index of my picture is always fixed for both day mode and night mode. For example, the 1st pixel index is 100. Which I can look up index 100 in day mode palette and night mode palette. How can I use GIMP to do so? My goal is to not update my pixel index of my picture. Also, as you see in two palette, they are not one one mapping. That is index 1 of the day mode palette and index 1 of the night mode palette may not used in the same pixel of the picture, how can I tackle this problem? Actually, my use case is as follow I want to use one 8bpp picture to achieve day/night mode by update only the color palette (without updating the pixel index). The advantage is I only have to prepare 2 256 byte palette rather than saving 2 big pictures in my limited data ram. Thanks a lot

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• Windows Handling Piped Comands Error Redirection

  - by jpmartins

  Warning: I am no expert on building scripts, and sorry for lousy English. In an case of generating a CSV from a database query I'm using the following commands. ... CALL java.exe -classpath ... com.xigole.util.sql.Jisql -user dmfodbc -pf pwd.file -driver com.sybase.jdbc3.jdbc.SybDriver -cstring %constr% -c ; -input 42.sql -formatter csv -delimiter ; 2%LOGFILE% | CALL grep -v -e "SELECT right" -e "executing: " -e " rows affect" %FicheiroR% 2%LOGFILE% ... I'm using windows implementation of grep. The 2%LOGFILE% in both java and grep command is causing an error message indicating the file is being use by another process. The Ugly workaround i have came up with is to put grep error redirect to a temporary %LOGFILE%.aux java ... | grep ... 2%LOGFILE%.aux type %LOGFILE%.aux % %LOGFILE% del %LOGFILE%.aux What is a better solution?

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• How does the ? make a quantifier lazy in regex

  - by Uriel Katz

  I've been looking into regex lately and figured that the ? operator makes the *,+, or ? lazy. My question is how does it do that? Is it that *? for example is a special operator, or does the ? have an effect on the *? In other words, does regex recognize *? as one operator in itself, or does regex recognize *? as the two separate operators * and ?? If it is the case that *? is being recognized as two separate operators, how does the ? affect the * to make it lazy. If ? means that the * is optional, shouldn't this mean that the * doesn't have to exists at all. If so, then in a statement .*? wouldn't regex just match separate letters and the whole string instead of the shorter string? Please explain, I'm desperate to understand.

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• How can we make agile enjoyable for developers that like to personally, independently own large chunks from start to finish

  - by Kris

  We’re roughly midway through our transition from waterfall to agile using scrum; we’ve changed from large teams in technology/discipline silos to smaller cross-functional teams. As expected, the change to agile doesn’t suit everyone. There are a handful of developers that are having a difficult time adjusting to agile. I really want to keep them engaged and challenged, and ultimately enjoying coming to work each day. These are smart, happy, motivated people that I respect on both a personal and a professional level. The basic issue is this: Some developers are primarily motivated by the joy of taking a piece of difficult work, thinking through a design, thinking through potential issues, then solving the problem piece by piece, with only minimal interaction with others, over an extended period of time. They generally complete work to a high level of quality and in a timely way; their work is maintainable and fits with the overall architecture. Transitioning to a cross-functional team that values interaction and shared responsibility for work, and delivery of working functionality within shorter intervals, the teams evolve such that the entire team knocks that difficult problem over. Many people find this to be a positive change; someone that loves to take a problem and own it independently from start to finish loses the opportunity for work like that. This is not an issue with people being open to change. Certainly we’ve seen a few people that don’t like change, but in the cases I’m concerned about, the individuals are good performers, genuinely open to change, they make an effort, they see how the rest of the team is changing and they want to fit in. It’s not a case of someone being difficult or obstructionist, or wanting to hoard the juiciest work. They just don’t find joy in work like they used to. I’m sure we can’t be the only place that hasn’t bumped up on this. How have others approached this? If you’re a developer that is motivated by personally owning a big chunk of work from end to end, and you’ve adjusted to a different way of working, what did it for you?

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