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  • "Cannot perform a differential backup for database "myDb", because a current database backup does no

    - by krimerd
    Hi there, I have what seems to be a pretty common problem when trying to take a differential backup. We have a SQL Server 2008 Standard (64bit) and we use Litespeed v 5.0.2.0 to take our backups. We take full backups once a week and a differential on a daily basis. The problem is, every time I try to take a diff backup I get the following error: "VDI open failed due to requested abort. BACKUP DATABASE is terminating abnormally. Cannot perform a differential backup for database "myDb", because a current database backup does not exist. Perform a full database backup by reissuing BACKUP DATABASE, omitting the WITH DIFFERENTIAL option." The problem is that I know 100% I have a full backup because I just double checked. Only once I was able to take a diff backup and that was when I took it immediately after I took a full backup. I have searched around and noticed that this is pretty common (although mostly with SQL 2005) and a solution that a lot of ppl suggest and that I haven't tried yet is to disable the SQL Server VSS Writer service. The problem with this is #1 I think I might need this service since I am using a third party backup software and #2 I am not sure exactly what the service does and don't want to disable it just like that. Has any of you ever experienced this problem and how did you go about fixing it? Thank you,

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  • Current wisdom on SQL Server and Hyperthreading?

    - by BradC
    Lots of articles out there (see Slava Oks's original SQL 2000 article and Kevin Kline's SQL 2005 update) recommend disabling hyperthreading on SQL servers, or at least testing your specific workload before enabling it on your servers. This issue is gradually becoming less relevant as true multi-core processors replace hyperthreaded ones, but what's the current wisdom on this issue? Does this advice change any with SQL 2005 64-bit, or SQL 2008, or Windows Server 2008? Ideally, this should be tested in advance in a staging environment, but what about for servers that have already made it into production with HT enabled? How can I tell if performance issues we're experiencing might be related to HT? Is there some specific combination of perfmon counters that might point me in that direction, as opposed to all the other things I normally pursue when working on improving SQL performance? Edit: This is especially attractive because of the potential for an across the board improvement for some of my high-cpu servers, but the client is going to want to see something concrete that helps me identify which servers really could benefit from disabling hyperthreading. Of course, conventional performance troubleshooting is ongoing, but sometimes any little bit helps.

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  • Customizing tmux status to represent current working directory and files

    - by user69397
    I've been playing with this for a couple of days, so I'm sure I'm missing something simple. Love tmux. Using it for development and have so many windows I need a better way of distinguishing them in the status bar and in the buffer list. Seeing a list of "bash" and "vim" isn't really helpful at all. And since they're all on the same host - don't care about the hostname right now. I'd like to show the current working directory, and the file being worked on. For example when I view the list of buffers I currently see: (0) 0: vim [100x44] (1 panes) "murph" (1) 1: vim [100x44] (1 panes) "murph" (2) 2: bash- [100x44] (1 panes) "murph" (3) 3: bash* [100x44] (1 panes) "murph" Here's what I'd like to see 0:vim main.py ~/devl/project1 1:vim index.html ~/devl/samples/staticfiles 2:bash ~/devl/sandbox 3:bash ~/.vimrc I'd like to see similar info in the status bar for each individual window. While I am able to get PWD to show up in the status bar of a window, it's only the working directory from where tmux was launched. This isn't any help as I change directories. I'm hoping this can be done without a bunch of scripts. Thanks all.

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  • Customizing tmux status to represent current working directory and files

    - by user69397
    I've been playing with this for a couple of days, so I'm sure I'm missing something simple. Love tmux. Using it for development and have so many windows I need a better way of distinguishing them in the status bar and in the buffer list. Seeing a list of "bash" and "vim" isn't really helpful at all. And since they're all on the same host - don't care about the hostname right now. I'd like to show the current working directory, and the file being worked on. For example when I view the list of buffers I currently see: (0) 0: vim [100x44] (1 panes) "murph" (1) 1: vim [100x44] (1 panes) "murph" (2) 2: bash- [100x44] (1 panes) "murph" (3) 3: bash* [100x44] (1 panes) "murph" Here's what I'd like to see 0:vim main.py ~/devl/project1 1:vim index.html ~/devl/samples/staticfiles 2:bash ~/devl/sandbox 3:bash ~/.vimrc I'd like to see similar info in the status bar for each individual window. While I am able to get PWD to show up in the status bar of a window, it's only the working directory from where tmux was launched. This isn't any help as I change directories. I'm hoping this can be done without a bunch of scripts. Thanks all.

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  • Reinitialize the current month name, when i click button

    - by EswaraMoorthyNEC
    Hi,In my richCalendar.jsp page, first time i click the showCurrentMonth button and display the current month using rich:calendar. i select some other month i click SelectedMonth button. I show the selected month name. My problem is : I go to any other page. then i come visit the richCalendar.jsp and again click showCurrentMonth button, this time the rich:calendar show the already selected month instead of current month . Each time, i want to show current month when i click showCurrentMonth. richCalendar.jsp <body> <h:form id="calendarForm" binding="#{CalenderBean.initForm}"> <rich:panel> <a4j:outputPanel id="calendarOutputPanel"> <h:panelGrid> <a4j:commandButton value="showCurrentMonth" action="#{CalenderBean.showCurrentMonthAction}" reRender="monthlyPanelGridId,monthlyCalendarId,calendarOutputPanel"/> <h:panelGrid id="monthlyPanelGridId" rendered="#{CalenderBean.monthlyCalendarRendered}" > <rich:calendar boundaryDatesMode="scroll" id="monthlyCalendarId" showWeekDaysBar="false" oncurrentdateselected="event.rich.component.selectDate(event.rich.date)" showFooter="false" popup="false" value="#{CalenderBean.selectedMonth}"/> </h:panelGrid> <h:panelGrid id = "SearchButtonGrid"> <a4j:commandButton id="SelectedMonth" value="SelectedMonth" action="#{CalenderBean.selectedMonthButtonAction}" reRender="calendarOutputPanel"/> <h:outputText value="#{CalenderBean.selectedMonthName}" /> </h:panelGrid> </h:panelGrid> </a4j:outputPanel> <rich:panel></h:form></body> CalenderBean.java import java.util.Calendar; import java.util.Date; import javax.faces.component.html.HtmlForm; public class CalenderBean { private HtmlForm initForm; private boolean monthlyCalendarRendered; private Date selectedMonth; private String selectedMonthName; public CalenderBean() { } public String showCurrentMonthAction() { monthlyCalendarRendered = true; Calendar calendar = Calendar.getInstance(); int startingDate = calendar.getActualMinimum(Calendar.DAY_OF_MONTH); calendar.set(Calendar.DATE, startingDate); selectedMonth = calendar.getTime(); return ""; } public String selectedMonthButtonAction() { selectedMonthName = selectedMonth.toString(); return ""; } public HtmlForm getInitForm() { selectedMonth = null; monthlyCalendarRendered = false; return initForm; } public void setInitForm(HtmlForm initForm){ this.initForm = initForm; } public boolean isMonthlyCalendarRendered(){ return monthlyCalendarRendered; } public void setMonthlyCalendarRendered(boolean monthlyCalendarRendered){ this.monthlyCalendarRendered = monthlyCalendarRendered; } public Date getSelectedMonth(){ return selectedMonth; } public void setSelectedMonth(Date selectedMonth){ this.selectedMonth = selectedMonth; } public String getSelectedMonthName(){ return selectedMonthName; } public void setSelectedMonthName(String selectedMonthName){ this.selectedMonthName = selectedMonthName; } } First time i visit this page perfectly show the current month. Then i go to any othe page and then come to see this page, click showCurrentMonth button not show the current month. Help me. Thanks in advance.

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  • JVM process resident set size "equals" max heap size, not current heap size

    - by Volune
    After a few reading about jvm memory (here, here, here, others I forgot...), I am expecting the resident set size of my java process to be roughly equal to the current heap space capacity. That's not what the numbers are saying, it seems to be roughly equal to the max heap space capacity: Resident set size: # echo 0 $(cat /proc/1/smaps | grep Rss | awk '{print $2}' | sed 's#^#+#') | bc 11507912 # ps -C java -O rss | gawk '{ count ++; sum += $2 }; END {count --; print "Number of processes =",count; print "Memory usage per process =",sum/1024/count, "MB"; print "Total memory usage =", sum/1024, "MB" ;};' Number of processes = 1 Memory usage per process = 11237.8 MB Total memory usage = 11237.8 MB Java heap # jmap -heap 1 Attaching to process ID 1, please wait... Debugger attached successfully. Server compiler detected. JVM version is 24.55-b03 using thread-local object allocation. Garbage-First (G1) GC with 18 thread(s) Heap Configuration: MinHeapFreeRatio = 10 MaxHeapFreeRatio = 20 MaxHeapSize = 10737418240 (10240.0MB) NewSize = 1363144 (1.2999954223632812MB) MaxNewSize = 17592186044415 MB OldSize = 5452592 (5.1999969482421875MB) NewRatio = 2 SurvivorRatio = 8 PermSize = 20971520 (20.0MB) MaxPermSize = 85983232 (82.0MB) G1HeapRegionSize = 2097152 (2.0MB) Heap Usage: G1 Heap: regions = 2560 capacity = 5368709120 (5120.0MB) used = 1672045416 (1594.586769104004MB) free = 3696663704 (3525.413230895996MB) 31.144272834062576% used G1 Young Generation: Eden Space: regions = 627 capacity = 3279945728 (3128.0MB) used = 1314914304 (1254.0MB) free = 1965031424 (1874.0MB) 40.089514066496164% used Survivor Space: regions = 49 capacity = 102760448 (98.0MB) used = 102760448 (98.0MB) free = 0 (0.0MB) 100.0% used G1 Old Generation: regions = 147 capacity = 1986002944 (1894.0MB) used = 252273512 (240.5867691040039MB) free = 1733729432 (1653.413230895996MB) 12.702574926293766% used Perm Generation: capacity = 39845888 (38.0MB) used = 38884120 (37.082786560058594MB) free = 961768 (0.9172134399414062MB) 97.58628042120682% used 14654 interned Strings occupying 2188928 bytes. Are my expectations wrong? What should I expect? I need the heap space to be able to grow during spikes (to avoid very slow Full GC), but I would like to have the resident set size as low as possible the rest of the time, to benefit the other processes running on the server. Is there a better way to achieve that? Linux 3.13.0-32-generic x86_64 java version "1.7.0_55" Running in Docker version 1.1.2 Java is running elasticsearch 1.2.0: /usr/bin/java -Xms5g -Xmx10g -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=20 -Xss256k -Djava.awt.headless=true -XX:+UseG1GC -XX:MaxGCPauseMillis=350 -XX:InitiatingHeapOccupancyPercent=45 -XX:+AggressiveOpts -XX:+UseCompressedOops -XX:-OmitStackTraceInFastThrow -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintClassHistogram -XX:+PrintTenuringDistribution -XX:+PrintGCApplicationStoppedTime -XX:+PrintGCApplicationConcurrentTime -Xloggc:/opt/elasticsearch/logs/gc.log -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/opt elasticsearch/logs/heapdump.hprof -XX:ErrorFile=/opt/elasticsearch/logs/hs_err.log -Des.logger.port=99999 -Des.logger.host=999.999.999.999 -Delasticsearch -Des.foreground=yes -Des.path.home=/opt/elasticsearch -cp :/opt/elasticsearch/lib/elasticsearch-1.2.0.jar:/opt/elasticsearch/lib/*:/opt/elasticsearch/lib/sigar/* org.elasticsearch.bootstrap.Elasticsearch There actually are 5 elasticsearch nodes, each in a different docker container. All have about the same memory usage. Some stats about the index: size: 9.71Gi (19.4Gi) docs: 3,925,398 (4,052,694)

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  • HttpContext.Items and Server.Transfer/Execute

    - by Rick Strahl
    A few days ago my buddy Ben Jones pointed out that he ran into a bug in the ScriptContainer control in the West Wind Web and Ajax Toolkit. The problem was basically that when a Server.Transfer call was applied the script container (and also various ClientScriptProxy script embedding routines) would potentially fail to load up the specified scripts. It turns out the problem is due to the fact that the various components in the toolkit use request specific singletons via a Current property. I use a static Current property tied to a Context.Items[] entry to handle this type of operation which looks something like this: /// <summary> /// Current instance of this class which should always be used to /// access this object. There are no public constructors to /// ensure the reference is used as a Singleton to further /// ensure that all scripts are written to the same clientscript /// manager. /// </summary> public static ClientScriptProxy Current { get { if (HttpContext.Current == null) return new ClientScriptProxy(); ClientScriptProxy proxy = null; if (HttpContext.Current.Items.Contains(STR_CONTEXTID)) proxy = HttpContext.Current.Items[STR_CONTEXTID] as ClientScriptProxy; else { proxy = new ClientScriptProxy(); HttpContext.Current.Items[STR_CONTEXTID] = proxy; } return proxy; } } The proxy is attached to a Context.Items[] item which makes the instance Request specific. This works perfectly fine in most situations EXCEPT when you’re dealing with Server.Transfer/Execute requests. Server.Transfer doesn’t cause Context.Items to be cleared so both the current transferred request and the original request’s Context.Items collection apply. For the ClientScriptProxy this causes a problem because script references are tracked on a per request basis in Context.Items to check for script duplication. Once a script is rendered an ID is written into the Context collection and so considered ‘rendered’: // No dupes - ref script include only once if (HttpContext.Current.Items.Contains( STR_SCRIPTITEM_IDENTITIFIER + fileId ) ) return; HttpContext.Current.Items.Add(STR_SCRIPTITEM_IDENTITIFIER + fileId, string.Empty); where the fileId is the script name or unique identifier. The problem is on the Transferred page the item will already exist in Context and so fail to render because it thinks the script has already rendered based on the Context item. Bummer. The workaround for this is simple once you know what’s going on, but in this case it was a bitch to track down because the context items are used in many places throughout this class. The trick is to determine when a request is transferred and then removing the specific keys. The first issue is to determine if a script is in a Trransfer or Execute call: if (HttpContext.Current.CurrentHandler != HttpContext.Current.Handler) Context.Handler is the original handler and CurrentHandler is the actual currently executing handler that is running when a Transfer/Execute is active. You can also use Context.PreviousHandler to get the last handler and chain through the whole list of handlers applied if Transfer calls are nested (dog help us all for the person debugging that). For the ClientScriptProxy the full logic to check for a transfer and remove the code looks like this: /// <summary> /// Clears all the request specific context items which are script references /// and the script placement index. /// </summary> public void ClearContextItemsOnTransfer() { if (HttpContext.Current != null) { // Check for Server.Transfer/Execute calls - we need to clear out Context.Items if (HttpContext.Current.CurrentHandler != HttpContext.Current.Handler) { List<string> Keys = HttpContext.Current.Items.Keys.Cast<string>().Where(s => s.StartsWith(STR_SCRIPTITEM_IDENTITIFIER) || s == STR_ScriptResourceIndex).ToList(); foreach (string key in Keys) { HttpContext.Current.Items.Remove(key); } } } } along with a small update to the Current property getter that sets a global flag to indicate whether the request was transferred: if (!proxy.IsTransferred && HttpContext.Current.Handler != HttpContext.Current.CurrentHandler) { proxy.ClearContextItemsOnTransfer(); proxy.IsTransferred = true; } return proxy; I know this is pretty ugly, but it works and it’s actually minimal fuss without affecting the behavior of the rest of the class. Ben had a different solution that involved explicitly clearing out the Context items and replacing the collection with a manually maintained list of items which also works, but required changes through the code to make this work. In hindsight, it would have been better to use a single object that encapsulates all the ‘persisted’ values and store that object in Context instead of all these individual small morsels. Hindsight is always 20/20 though :-}. If possible use Page.Items ClientScriptProxy is a generic component that can be used from anywhere in ASP.NET, so there are various methods that are not Page specific on this component which is why I used Context.Items, rather than the Page.Items collection.Page.Items would be a better choice since it will sidestep the above Server.Transfer nightmares as the Page is reloaded completely and so any new Page gets a new Items collection. No fuss there. So for the ScriptContainer control, which has to live on the page the behavior is a little different. It is attached to Page.Items (since it’s a control): /// <summary> /// Returns a current instance of this control if an instance /// is already loaded on the page. Otherwise a new instance is /// created, added to the Form and returned. /// /// It's important this function is not called too early in the /// page cycle - it should not be called before Page.OnInit(). /// /// This property is the preferred way to get a reference to a /// ScriptContainer control that is either already on a page /// or needs to be created. Controls in particular should always /// use this property. /// </summary> public static ScriptContainer Current { get { // We need a context for this to work! if (HttpContext.Current == null) return null; Page page = HttpContext.Current.CurrentHandler as Page; if (page == null) throw new InvalidOperationException(Resources.ERROR_ScriptContainer_OnlyWorks_With_PageBasedHandlers); ScriptContainer ctl = null; // Retrieve the current instance ctl = page.Items[STR_CONTEXTID] as ScriptContainer; if (ctl != null) return ctl; ctl = new ScriptContainer(); page.Form.Controls.Add(ctl); return ctl; } } The biggest issue with this approach is that you have to explicitly retrieve the page in the static Current property. Notice again the use of CurrentHandler (rather than Handler which was my original implementation) to ensure you get the latest page including the one that Server.Transfer fired. Server.Transfer and Server.Execute are Evil All that said – this fix is probably for the 2 people who are crazy enough to rely on Server.Transfer/Execute. :-} There are so many weird behavior problems with these commands that I avoid them at all costs. I don’t think I have a single application that uses either of these commands… Related Resources Full source of ClientScriptProxy.cs (repository) Part of the West Wind Web Toolkit Static Singletons for ASP.NET Controls Post © Rick Strahl, West Wind Technologies, 2005-2010Posted in ASP.NET  

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  • nvidia driver problem after update

    - by baltasar
    I know there are a lot of posts about nvdia driver, but I am not able to solve this. I updated my configuration yesterday, September 27th, and it seems that a new nvidia driver was involved. The updated completed with an error, and invited me to send a bug report automatically. I send it, but it finally said that there was no place to send the bug report to. Today I updated again, and a new kernel was there. Then I rebooted. I found a desktop in 640x480 with a horrible, unreadable font. I run jockey and tried to go back to another version of the nvidia driver, but it seems that none of the drivers listed there are suddenly valid. I have the x-swat repository enabled, because I remember that I had a similar issue in the past that was only to be solved with the newest driver. jockey log: 2012-09-28 11:22:24,747 DEBUG: Selecting previously unselected package nvidia-173. (Reading database ... 536311 files and directories currently installed.) Unpacking nvidia-173 (from .../nvidia-173_173.14.35-0ubuntu0.2_i386.deb) ... Processing triggers for man-db ... Setting up nvidia-173 (173.14.35-0ubuntu0.2) ... Loading new nvidia-173-173.14.35 DKMS files... Building only for 3.2.0-32-generic-pae Building for architecture i686 Building initial module for 3.2.0-32-generic-pae Error! Bad return status for module build on kernel: 3.2.0-32-generic-pae (i686) Consult /var/lib/dkms/nvidia-173/173.14.35/build/make.log for more information. Processing triggers for bamfdaemon ... Rebuilding /usr/share/applications/bamf.index... 2012-09-28 11:22:25,143 WARNING: modinfo for module nvidia_173 failed: ERROR: modinfo: could not find module nvidia_173 2012-09-28 11:22:25,143 ERROR: XorgDriverHandler.enable(): package or module not installed, aborting 2012-09-28 11:22:53,613 DEBUG: NVidia(nvidia_173).enabled(): target_alt /usr/lib/nvidia-173/ld.so.conf current_alt /usr/lib/nvidia-173/ld.so.conf other target alt /usr/lib/nvidia-173/alt_ld.so.conf other current alt /usr/lib/nvidia-173/alt_ld.so.conf 2012-09-28 11:22:53,613 DEBUG: KMH enabled: False 2012-09-28 11:22:53,629 DEBUG: NVidia(nvidia_173).enabled(): target_alt /usr/lib/nvidia-173/ld.so.conf current_alt /usr/lib/nvidia-173/ld.so.conf other target alt /usr/lib/nvidia-173/alt_ld.so.conf other current alt /usr/lib/nvidia-173/alt_ld.so.conf 2012-09-28 11:22:53,629 DEBUG: KMH enabled: False 2012-09-28 11:23:01,943 DEBUG: NVidia(nvidia_173).enabled(): target_alt /usr/lib/nvidia-173/ld.so.conf current_alt /usr/lib/nvidia-173/ld.so.conf other target alt /usr/lib/nvidia-173/alt_ld.so.conf other current alt /usr/lib/nvidia-173/alt_ld.so.conf 2012-09-28 11:23:01,943 DEBUG: KMH enabled: False 2012-09-28 11:23:01,962 DEBUG: NVidia(nvidia_173).enabled(): target_alt /usr/lib/nvidia-173/ld.so.conf current_alt /usr/lib/nvidia-173/ld.so.conf other target alt /usr/lib/nvidia-173/alt_ld.so.conf other current alt /usr/lib/nvidia-173/alt_ld.so.conf 2012-09-28 11:23:01,963 DEBUG: KMH enabled: False 2012-09-28 11:23:01,998 DEBUG: NVidia(nvidia_173_updates).enabled(): target_alt None current_alt /usr/lib/nvidia-173/ld.so.conf other target alt None other current alt /usr/lib/nvidia-173/alt_ld.so.conf 2012-09-28 11:23:01,998 DEBUG: nvidia_173_updates is not the alternative in use 2012-09-28 11:23:02,044 DEBUG: NVidia(nvidia_current).enabled(): target_alt /usr/lib/nvidia-current/ld.so.conf current_alt /usr/lib/nvidia-173/ld.so.conf other target alt /usr/lib/nvidia-current/alt_ld.so.conf other current alt /usr/lib/nvidia-173/alt_ld.so.conf 2012-09-28 11:23:02,044 DEBUG: nvidia_current is not the alternative in use 2012-09-28 11:23:02,066 DEBUG: NVidia(nvidia_current).enabled(): target_alt /usr/lib/nvidia-current/ld.so.conf current_alt /usr/lib/nvidia-173/ld.so.conf other target alt /usr/lib/nvidia-current/alt_ld.so.conf other current alt /usr/lib/nvidia-173/alt_ld.so.conf 2012-09-28 11:23:02,066 DEBUG: nvidia_current is not the alternative in use 2012-09-28 11:23:02,106 DEBUG: NVidia(nvidia_current_updates).enabled(): target_alt None current_alt /usr/lib/nvidia-173/ld.so.conf other target alt None other current alt /usr/lib/nvidia-173/alt_ld.so.conf 2012-09-28 11:23:02,106 DEBUG: nvidia_current_updates is not the alternative in use 2012-09-28 11:23:02,157 DEBUG: NVidia(nvidia_173).enabled(): target_alt /usr/lib/nvidia-173/ld.so.conf current_alt /usr/lib/nvidia-173/ld.so.conf other target alt /usr/lib/nvidia-173/alt_ld.so.conf other current alt /usr/lib/nvidia-173/alt_ld.so.conf 2012-09-28 11:23:02,157 DEBUG: KMH enabled: False 2012-09-28 11:23:02,177 DEBUG: NVidia(nvidia_173).enabled(): target_alt /usr/lib/nvidia-173/ld.so.conf current_alt /usr/lib/nvidia-173/ld.so.conf other target alt /usr/lib/nvidia-173/alt_ld.so.conf other current alt /usr/lib/nvidia-173/alt_ld.so.conf 2012-09-28 11:23:02,178 DEBUG: KMH enabled: False 2012-09-28 11:23:02,245 DEBUG: NVidia(nvidia_173).enabled(): target_alt /usr/lib/nvidia-173/ld.so.conf current_alt /usr/lib/nvidia-173/ld.so.conf other target alt /usr/lib/nvidia-173/alt_ld.so.conf other current alt /usr/lib/nvidia-173/alt_ld.so.conf 2012-09-28 11:23:02,245 DEBUG: KMH enabled: False 2012-09-28 11:23:02,272 DEBUG: NVidia(nvidia_173).enabled(): target_alt /usr/lib/nvidia-173/ld.so.conf current_alt /usr/lib/nvidia-173/ld.so.conf other target alt /usr/lib/nvidia-173/alt_ld.so.conf other current alt /usr/lib/nvidia-173/alt_ld.so.conf 2012-09-28 11:23:02,273 DEBUG: KMH enabled: False 2012-09-28 11:23:02,303 DEBUG: NVidia(nvidia_173_updates).enabled(): target_alt None current_alt /usr/lib/nvidia-173/ld.so.conf other target alt None other current alt /usr/lib/nvidia-173/alt_ld.so.conf 2012-09-28 11:23:02,303 DEBUG: nvidia_173_updates is not the alternative in use 2012-09-28 11:23:02,330 DEBUG: NVidia(nvidia_current).enabled(): target_alt /usr/lib/nvidia-current/ld.so.conf current_alt /usr/lib/nvidia-173/ld.so.conf other target alt /usr/lib/nvidia-current/alt_ld.so.conf other current alt /usr/lib/nvidia-173/alt_ld.so.conf 2012-09-28 11:23:02,410 DEBUG: nvidia_current is not the alternative in use 2012-09-28 11:23:02,427 DEBUG: NVidia(nvidia_current).enabled(): target_alt /usr/lib/nvidia-current/ld.so.conf current_alt /usr/lib/nvidia-173/ld.so.conf other target alt /usr/lib/nvidia-current/alt_ld.so.conf other current alt /usr/lib/nvidia-173/alt_ld.so.conf 2012-09-28 11:23:02,428 DEBUG: nvidia_current is not the alternative in use 2012-09-28 11:23:02,457 DEBUG: NVidia(nvidia_current_updates).enabled(): target_alt None current_alt /usr/lib/nvidia-173/ld.so.conf other target alt None other current alt /usr/lib/nvidia-173/alt_ld.so.conf 2012-09-28 11:23:02,458 DEBUG: nvidia_current_updates is not the alternative in use

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  • Physics System ignores collision in some rare cases

    - by Gajoo
    I've been developing a simple physics engine for my game. since the game physics is very simple I've decided to increase accuracy a little bit. Instead of formal integration methods like fourier or RK4, I'm directly computing the results after delta time "dt". based on the very first laws of physics : dx = 0.5 * a * dt^2 + v0 * dt dv = a * dt where a is acceleration and v0 is object's previous velocity. Also to handle collisions I've used a method which is somehow different from those I've seen so far. I'm detecting all the collision in the given time frame, stepping the world forward to the nearest collision, resolving it and again check for possible collisions. As I said the world consist of very simple objects, so I'm not loosing any performance due to multiple collision checking. First I'm checking if the ball collides with any walls around it (which is working perfectly) and then I'm checking if it collides with the edges of the walls (yellow points in the picture). the algorithm seems to work without any problem except some rare cases, in which the collision with points are ignored. I've tested everything and all the variables seem to be what they should but after leaving the system work for a minute or two the system the ball passes through one of those points. Here is collision portion of my code, hopefully one of you guys can give me a hint where to look for a potential bug! void PhysicalWorld::checkForPointCollision(Vec2 acceleration, PhysicsComponent& ball, Vec2& collisionNormal, float& collisionTime, Vec2 target) { // this function checks if there will be any collision between a circle and a point // ball contains informations about the circle (it's current velocity, position and radius) // collisionNormal is an output variable // collisionTime is also an output varialbe // target is the point I want to check for collisions Vec2 V = ball.mVelocity; Vec2 A = acceleration; Vec2 P = ball.mPosition - target; float wallWidth = mMap->getWallWidth() / (mMap->getWallWidth() + mMap->getHallWidth()) / 2; float r = ball.mRadius / (mMap->getWallWidth() + mMap->getHallWidth()); // r is ball radius scaled to match actual rendered object. if (A.any()) // todo : I need to first correctly solve the collisions in case there is no acceleration return; if (V.any()) // if object is not moving there will be no collisions! { float D = P.x * V.y - P.y * V.x; float Delta = r*r*V.length2() - D*D; if(Delta < eps) return; Delta = sqrt(Delta); float sgnvy = V.y > 0 ? 1: (V.y < 0?-1:0); Vec2 c1(( D*V.y+sgnvy*V.x*Delta) / V.length2(), (-D*V.x+fabs(V.y)*Delta) / V.length2()); Vec2 c2(( D*V.y-sgnvy*V.x*Delta) / V.length2(), (-D*V.x-fabs(V.y)*Delta) / V.length2()); float t1 = (c1.x - P.x) / V.x; float t2 = (c2.x - P.x) / V.x; if(t1 > eps && t1 <= collisionTime) { collisionTime = t1; collisionNormal = c1; } if(t2 > eps && t2 <= collisionTime) { collisionTime = t2; collisionNormal = c2; } } } // this function should step the world forward by dt. it doesn't check for collision of any two balls (components) // it just checks if there is a collision between the current component and 4 points forming a rectangle around it. void PhysicalWorld::step(float dt) { for (unsigned i=0;i<mObjects.size();i++) { PhysicsComponent &current = *mObjects[i]; Vec2 acceleration = current.mForces * current.mInvMass; float rt=dt; // stores how much more the world should advance while(rt > eps) { float collisionTime = rt; Vec2 collisionNormal = Vec2(0,0); float halfWallWidth = mMap->getWallWidth() / (mMap->getWallWidth() + mMap->getHallWidth()) / 2; // we check if there is any collision with any of those 4 points around the ball // if there is a collision both collisionNormal and collisionTime variables will change // after these functions collisionTime will be exactly the value of nearest collision (if any) // and if there was, collisionNormal will report in which direction the ball should return. checkForPointCollision(acceleration,current,collisionNormal,collisionTime,Vec2(floor(current.mPosition.x) + halfWallWidth,floor(current.mPosition.y) + halfWallWidth)); checkForPointCollision(acceleration,current,collisionNormal,collisionTime,Vec2(floor(current.mPosition.x) + halfWallWidth, ceil(current.mPosition.y) - halfWallWidth)); checkForPointCollision(acceleration,current,collisionNormal,collisionTime,Vec2( ceil(current.mPosition.x) - halfWallWidth,floor(current.mPosition.y) + halfWallWidth)); checkForPointCollision(acceleration,current,collisionNormal,collisionTime,Vec2( ceil(current.mPosition.x) - halfWallWidth, ceil(current.mPosition.y) - halfWallWidth)); // either if there is a collision or if there is not we step the forward since we are sure there will be no collision before collisionTime current.mPosition += collisionTime * (collisionTime * acceleration * 0.5 + current.mVelocity); current.mVelocity += collisionTime * acceleration; // if the ball collided with anything collisionNormal should be at least none zero in one of it's axis if (collisionNormal.any()) { collisionNormal *= Dot(collisionNormal, current.mVelocity) / collisionNormal.length2(); current.mVelocity -= 2 * collisionNormal; // simply reverse velocity along collision normal direction } rt -= collisionTime; } // reset all forces for current object so it'll be ready for later game event current.mForces.zero(); } }

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  • Mac Terminal.app: Force '^C' to be printed when editing current prompt, then aborting it

    - by Stefan Lasiewski
    This is the opposite of Prevent “^C” from being printed when aborting editing current prompt. I'm using Bash. When I'm editing the commandline in Bash, and I hit Control-C to abort the commandline, the '^C' character does not display. I would like to see this character. I tried commands like stty -ctlecho and stty ctlecho (which I borrowed from the other question), but this didn't work for me. This behavior seems to be true with my environment on Ubuntu, CentOS and MacOSX. This only happens within Apple's Terminal.App. If I SSH to a remote Linux or FreeBSD box, then ^C is printed. So, this is clearly just a local setting. Update: Here is the output of stty -a, as requested by @quack quixote : $ stty -a speed 9600 baud; 41 rows; 88 columns; lflags: icanon isig iexten echo echoe -echok echoke -echonl echoctl -echoprt -altwerase -noflsh -tostop -flusho pendin -nokerninfo -extproc iflags: -istrip icrnl -inlcr -igncr ixon -ixoff ixany imaxbel iutf8 -ignbrk brkint -inpck -ignpar -parmrk oflags: opost onlcr -oxtabs -onocr -onlret cflags: cread cs8 -parenb -parodd hupcl -clocal -cstopb -crtscts -dsrflow -dtrflow -mdmbuf cchars: discard = ^O; dsusp = ^Y; eof = ^D; eol = <undef>; eol2 = <undef>; erase = ^?; intr = ^C; kill = ^U; lnext = ^V; min = 1; quit = ^\; reprint = ^R; start = ^Q; status = ^T; stop = ^S; susp = ^Z; time = 0; werase = ^W; After typing stty sane, stty -a will output the following. The only difference is the parameter of -iutf8. $ stty sane $ stty -a speed 9600 baud; 41 rows; 157 columns; lflags: icanon isig iexten echo echoe -echok echoke -echonl echoctl -echoprt -altwerase -noflsh -tostop -flusho pendin -nokerninfo -extproc iflags: -istrip icrnl -inlcr -igncr ixon -ixoff ixany imaxbel -iutf8 -ignbrk brkint -inpck -ignpar -parmrk oflags: opost onlcr -oxtabs -onocr -onlret cflags: cread cs8 -parenb -parodd hupcl -clocal -cstopb -crtscts -dsrflow -dtrflow -mdmbuf cchars: discard = ^O; dsusp = ^Y; eof = ^D; eol = <undef>; eol2 = <undef>; erase = ^?; intr = ^C; kill = ^U; lnext = ^V; min = 1; quit = ^\; reprint = ^R; start = ^Q; status = ^T; stop = ^S; susp = ^Z; time = 0; werase = ^W;

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  • HttpContext.Current.User.Identity.Name is Empty

    - by Jordy
    I have a silverlight application (using MVC) and when i'm building in visual studio, using Visual Studio Development center, there's no problem, the HttpContext.Current.User.Identity.Name has a Value But when i'm using the same project with IIS 7.5 (i'm using Windows 7), HttpContext.Current.User.Identity.Name stays empty Anyone who can help? Or knows where i can find the settings from the visual studio Development center, so i can check what's wrong in IIS?

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  • can ServiceLocator.Current.GetInstance return null?

    - by mauricio076
    I have this piece of code (or similar) in many of our views: private IEventAggregator eventAggregator; Constructor() { eventAggregator = ServiceLocator.Current.GetInstance<IEventAggregator>(); ... } I read from this post that ServiceLocator.Current can throw NullReferenceException (bad thing on a constructor) but I was wondering if the GetInstance<() method can return null (or some other inconsistent object) making eventAggregator dangerous to use later in other methods. NOTE: I'm quite new to MVVM and WPF

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  • Django: How to get current user in admin forms

    - by lazerscience
    In Django's ModelAdmin I need to display forms customized according to the permissions an user has. Is there a way of getting the current user object into the form class, so that i can customize the form in its __init__ method? I think saving the current request in a thread local would be a possibility but this would be my last resort think I'm thinking it is a bad design approach....

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  • Appfabric WF-WCF services retrive current url in codeactivity

    - by tartafe
    Hi, i have developed a wf-wcf services with a code activity and in it i want to retrive the current url of the service. If i disabling the persistence feature of appfabric i can retrive the url using HttpContext.Current.Request.Url.ToString() If the persistence feature is enabled the httpcontext is null. There is a different way to retrive the url of th wcf that host my code activity? Thanks in advace

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  • Rails Gem Install Problems: Google-Geocode

    - by spin-docta
    I'm try to install google-geocode for rails sudo gem install google-geocode but I get the following error. Any suggestions? Building native extensions. This could take a while... ERROR: Error installing google-geocode: ERROR: Failed to build gem native extension. /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb checking for iconv.h in /opt/local/include/,/opt/local/include/libxml2,/opt/local/include,/opt/local/include,/opt/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/include,/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/include/libxml2,/usr/include,/usr/include/libxml2... yes checking for libxml/parser.h in /opt/local/include/,/opt/local/include/libxml2,/opt/local/include,/opt/local/include,/opt/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/include,/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/include/libxml2,/usr/include,/usr/include/libxml2... yes checking for libxslt/xslt.h in /opt/local/include/,/opt/local/include/libxml2,/opt/local/include,/opt/local/include,/opt/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/include,/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/include/libxml2,/usr/include,/usr/include/libxml2... yes checking for libexslt/exslt.h in /opt/local/include/,/opt/local/include/libxml2,/opt/local/include,/opt/local/include,/opt/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/include,/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/include/libxml2,/usr/include,/usr/include/libxml2... yes checking for xmlParseDoc() in -lxml2... no libxml2 is missing. try 'port install libxml2' or 'yum install libxml2' *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby --with-iconv-dir --without-iconv-dir --with-iconv-include --without-iconv-include=${iconv-dir}/include --with-iconv-lib --without-iconv-lib=${iconv-dir}/lib --with-xml2-dir --without-xml2-dir --with-xml2-include --without-xml2-include=${xml2-dir}/include --with-xml2-lib --without-xml2-lib=${xml2-dir}/lib --with-xslt-dir --without-xslt-dir --with-xslt-include --without-xslt-include=${xslt-dir}/include --with-xslt-lib --without-xslt-lib=${xslt-dir}/lib --with-xml2lib --without-xml2lib Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/nokogiri-1.4.0 for inspection. Results logged to /Library/Ruby/Gems/1.8/gems/nokogiri-1.4.0/ext/nokogiri/gem_make.out

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  • How to access current item from a sharepoint list in Visual Studio 2010

    - by Damir
    Hello, When using sharepoint designer you can quite easily use current item and perform different actions with it when using workflows etc. However, the options available are limited. I am wondering how to access current item in a list through visual studio 2010 and use and assign values from its fields to variables or items in another list automatically using C# code. Any help would be most appreciated. Thanks

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  • The current state of Perl6

    - by Cobalt
    What is the current state of Perl6, is it production-ready ? Where do we stand right now ? There are many programmers curious about the current progress of Perl6. There are also two other topics open on on reddit and perlmonks.org/?node_id=835419 about this.

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  • Can't build gem -- native extension build fails -- can you see why?

    - by marfarma
    I can't figure out what is going wrong here -- any ideas?? I'm running on a Ubuntu 8.04 LTS, and have installed libxml2 and libxslt from these instructions: http://www.techsww.com/tutorials/libraries/libxml/installation/installing_libxml_on_ubuntu_linux.php http://www.techsww.com/tutorials/libraries/libxslt/installation/installing_libxslt_on_ubuntu_linux.php However, I installed the latest versions: libxslt-1.1.24 libxml2-2.7.3 The install was uneventful -------------------- I set LD_LIBRARY_PATH ---------------------------------- echo $LD_LIBRARY_PATH /usr/local/libxslt/lib: ------------- seems like the function is present -- at least based on the output of strings ------------ /usr/local/libxslt/lib$ strings * | grep ParseStylesheetDoc xsltParseStylesheetDoc xsltParseStylesheetDoc xsltParseStylesheetDoc xsltParseStylesheetDoc xsltParseStylesheetDoc xsltParseStylesheetDoc xsltParseStylesheetDoc ----------------------- But the compile still fails ---------------------------------------- sudo gem install webrat Building native extensions. This could take a while... ERROR: Error installing webrat: ERROR: Failed to build gem native extension. /usr/local/bin/ruby extconf.rb install webrat checking for iconv.h in /opt/local/include/,/opt/local/include/libxml2,/opt/local/include,/opt/local/include,/opt/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/usr/include,/usr/include/libxml2... yes checking for libxml/parser.h in /opt/local/include/,/opt/local/include/libxml2,/opt/local/include,/opt/local/include,/opt/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/usr/include,/usr/include/libxml2... yes checking for libxslt/xslt.h in /opt/local/include/,/opt/local/include/libxml2,/opt/local/include,/opt/local/include,/opt/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/usr/include,/usr/include/libxml2... yes checking for libexslt/exslt.h in /opt/local/include/,/opt/local/include/libxml2,/opt/local/include,/opt/local/include,/opt/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/usr/include,/usr/include/libxml2... yes checking for xmlParseDoc() in -lxml2... yes checking for xsltParseStylesheetDoc() in -lxslt... no libxslt is missing. try 'port install libxslt' or 'yum install libxslt-devel' *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/usr/local/bin/ruby --with-iconv-dir --without-iconv-dir --with-iconv-include --without-iconv-include=${iconv-dir}/include --with-iconv-lib --without-iconv-lib=${iconv-dir}/lib --with-xml2-dir --without-xml2-dir --with-xml2-include --without-xml2-include=${xml2-dir}/include --with-xml2-lib --without-xml2-lib=${xml2-dir}/lib --with-xslt-dir --without-xslt-dir --with-xslt-include --without-xslt-include=${xslt-dir}/include --with-xslt-lib --without-xslt-lib=${xslt-dir}/lib --with-xml2lib --without-xml2lib --with-xsltlib --without-xsltlib Gem files will remain installed in /usr/local/lib/ruby/gems/1.8/gems/nokogiri-1.3.3 for inspection. Results logged to /usr/local/lib/ruby/gems/1.8/gems/nokogiri-1.3.3/ext/nokogiri/gem_make.out

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  • SPContext.Current is null in a web service under a sharepoint site

    - by Ariel
    I'm exposing a web service in a SharePoint site e.g. http://server/_vti_bin/subdir/mywebservice.asmx. In the web service method, SPContext.Current appears to be null. (Interestingly, I'm looking at an example in Chapter 5 of Inside Windows SharePoint Services 3.0 and they use SPContext.Current inside a web service!) Any idea what am I missing? Thanks in advance.

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  • What is the current state of Perl 6?

    - by Cobalt
    What is the current state of Perl 6, is it production-ready? Where do we stand right now? There are many programmers curious about the current progress of Perl 6. There are also two other topics open on on reddit and http://perlmonks.org/?node_id=835419 about this.

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  • how to define current timestamp in yaml with doctrine

    - by Carson
    I tried the following yaml code: columns: created_time: type: timestamp notnull: true default: default CURRENT_TIMESTAMP In the outputted sql statement, the field is treated as datetime instead of timestamp, which I cannot define the current timestamp in it... If I insist to use timestamp to store current time, how to do so in yaml?

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