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  • Cloning a VM to add a new MySQL Slave

    - by Ben Holness
    I am in the process of adding a new slave to a replicated mysql setup. All of the slave nodes are virtual machines. If I clone one of the nodes to a new VM, then start it with no networking, stop mysql, change the server-id in my.cnf to a new id and then restart mysql and networking, will it all work correctly, or will mysql get confused because it used to be a different server id? OS: Ubuntu 10.10 VM Platform: VMWare 5 MySQL : Server version: 5.1.49-1ubuntu8.1-log (Ubuntu)

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  • How to tune system settings for mongoDB on Linux?

    - by jsh
    Trying to squeeze a lot out of one question here -- please bear with me. Although the MongoDB man pages make several useful recommendations about system settings like ulimit (http://docs.mongodb.org/manual/reference/ulimit/), and other production factors (http://docs.mongodb.org/manual/administration/production-notes/) they seem mysteriously silent on things like virtual memory and swap settings. The closest we get to a hint is that "...the operating system’s virtual memory subsystem manages MongoDB’s memory..." (http://docs.mongodb.org/manual/faq/fundamentals/#does-mongodb-require-a-lot-of-ram). Running the same job - high writes and high reads on about 10,000,000 records in a single collection -- on my 4-processor, 4GB RAM macbook and an 8-core ubuntu box with 64GB RAM I saw dramatically WORSE read performance on the linux box with factory settings, and could hear the disk constantly spinning, indicating high I/O and presumably swapping. Yes, other things were happening on the box, but there was plenty of free RAM, disk space, etc.; furthermore, I did not see evidence that Mongo was expanding to take advantage of all that free RAM as it is touted to do. Linux box default settings were as follows: vm.swappiness =60 vm.dirty_background_ratio = 10 vm.dirty_ratio = 20 vm.dirty_expire_centisecs =3000 vm.dirty_writeback_centisecs=500 I hazarded some guesses looking at docs and blogs for other types of databases (Oracle, MYSQL, etc.), experimented, and adjusted as below. vm.swappiness=10 vm.dirty_background_ratio=5 vm.dirty_ratio=5 vm.dirty_writeback_centisecs=250 vm.dirty_expire_centisecs=500 I saw some immediate apparent improvements in read time. However, when I ran my test jobs again, read performance continued to be painfully sluggish during heavy writes. Then, I REBUILT the collection from an available data source - and suddenly I can read at 1ms or less per record WHILE doing the write job! So the question is really two-fold: 1) What are appropriate VM settings for MongoDB on Linux? 2) (bonus) Does Mongo do some checking or optimization with the OS while data is being built? In other words, if I have built a large data set with suboptimal VM or I/O settings, does Mongo make assumptions during the memory-mapping process that will fail to take advantage of optimizations down the road? Obviously I don't fully grok memory mapping under the hood (I was hoping I wouldn't have to). Any help appreciated...thanks! -j

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  • Configuration to point an X tty to a separate system?

    - by buu700
    Specifically, I have an Ubuntu 10.04 system with a headless Ubuntu 12.04 virtual machine, and I'm looking for a way to have it set up so pressing ctrl+alt+F8 will take me into another X client which is connected to an X server on the vm (with gdm appropriately displayed at startup, etc.). As in, my startup script should spin up the headless machine and then immediately perform a "startx" pointed at the vm.

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  • Windows 7: Some time my mouse got "virtually" unplugged and plugged again in some seconds.

    - by yes123
    So guys, sometime when i am browsing or doing other stuff it's like windows unplugs my usb-logitech-mouse. it than get riconnected again in few seconds. I tihnk this is happening after I had to install virtual machines (like: virtualbox and vmware) I already disinstalled them but this issue is still here. When this happens even the lights on my mouse are off same behaviour as like somone unplagged it. What could i do?

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  • Save image of running Windows 8 to run from Ubuntu

    - by Noel Evans
    I have a brand new Windows 8 PC. I'd like to hold on to the licensed copy in case I need to run a Windows app at some time in the future but want to wipe the machine completely, installing Ubuntu with no dual-boot. Is it possible to save an image of Windows 8 which can then be run (on the same laptop) from Linux as a virtual machine? If so, what applications (ideally free) should I use to make the image and then run it from Ubuntu?

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  • Trouble with Ubuntu on Oracle VM

    - by Rosarch
    I'm running Ubuntu on an Oracle VirtualBox virtual machine. I clicked the "install Ubuntu" button, and it took me through a wizard. I am currently on the following step: Unfortunately, the "forward" button is disabled. What's up with this? I tried entering different data for the form on this step, going back and redoing part of the wizard, and rebooting the machine. Nothing worked. My host OS is Windows 7.

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  • Possible reasons for high CPU load of taskmgr.exe process on VM?

    - by mjn
    On a VMware virtual machine which has severe performance problems I can see a constant average of 20+ percent CPU load for the TASKMGR.EXE (task manager) process. The apps running on this server have lower load, around 4 to 10 percent average. The VM is running Windows 2003 Server Standard with 3.75 GB assigned RAM. I suspect that the task manager CPU load has something to do with other VM instances on the VMWare server but could not see a similar value on internal ESXi systems (the problematic VM runs in the customers IT).

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  • Create a class that inherets DrawableGameComponent in XNA as a CLASS with custom functions

    - by user3675013
    using Microsoft.Xna.Framework.Graphics; using Microsoft.Xna.Framework.Media; using Microsoft.Xna.Framework; using Microsoft.Xna.Framework.Content; namespace TileEngine { class Renderer : DrawableGameComponent { public Renderer(Game game) : base(game) { } SpriteBatch spriteBatch ; protected override void LoadContent() { base.LoadContent(); } public override void Draw(GameTime gameTime) { base.Draw(gameTime); } public override void Update(GameTime gameTime) { base.Update(gameTime); } public override void Initialize() { base.Initialize(); } public RenderTarget2D new_texture(int width, int height) { Texture2D TEX = new Texture2D(GraphicsDevice, width, height); //create the texture to render to RenderTarget2D Mine = new RenderTarget2D(GraphicsDevice, width, height); GraphicsDevice.SetRenderTarget(Mine); //set the render device to the reference provided //maybe base.draw can be used with spritebatch. Idk. We'll see if the order of operation //works out. Wish I could call base.draw here. return Mine; //I'm hoping that this returns the same instance and not a copy. } public void draw_texture(int width, int height, RenderTarget2D Mine) { GraphicsDevice.SetRenderTarget(null); //Set the renderer to render to the backbuffer again Rectangle drawrect = new Rectangle(0, 0, width, height); //Set the rendering size to what we want spriteBatch.Begin(); //This uses spritebatch to draw the texture directly to the screen spriteBatch.Draw(Mine, drawrect, Color.White); //This uses the color white spriteBatch.End(); //ends the spritebatch //Call base.draw after this since it doesn't seem to recognize inside the function //maybe base.draw can be used with spritebatch. Idk. We'll see if the order of operation //works out. Wish I could call base.draw here. } } } I solved a previous issue where I wasn't allowed to access GraphicsDevice outside the main Default 'main' class Ie "Game" or "Game1" etc. Now I have a new issue. FYi no one told me that it would be possible to use GraphicsDevice References to cause it to not be null by using the drawable class. (hopefully after this last bug is solved it doesn't still return null) Anyways at present the problem is that I can't seem to get it to initialize as an instance in my main program. Ie Renderer tileClipping; and I'm unable to use it such as it is to be noted i haven't even gotten to testing these two steps below but before it compiled but when those functions of this class were called it complained that it can't render to a null device. Which meant that the device wasn't being initialized. I had no idea why. It took me hours to google this. I finally figured out the words I needed.. which were "do my rendering in XNA in a seperate class" now I haven't used the addcomponent function because I don't want it to only run these functions automatically and I want to be able to call the custom ones. In a nutshell what I want is: *access to rendering targets and graphics device OUTSIDE default class *passing of Rendertarget2D (which contain textures and textures should automatically be passed with a rendering target? ) *the device should be passed to this function as well OR the device should be passed to this function as a byproduct of passing the rendertarget (which is automatically associated with the render device it was given originally) *I'm assuming I'm dealing with abstracted pointers here so when I pass a class object or instance, I should be recieving the SAME object , I referenced, and not a copy that has only the lifespan of the function running. *the purpose for all these options: I want to initialize new 2d textures on the fly to customize tileclipping and even the X , y Offsets of where a WHOLE texture will be rendered, and the X and Y offsets of where tiles will be rendered ON that surface. This is why. And I'll be doing region based lighting effects per tile or even per 8X8 pixel spaces.. we'll see I'll also be doing sprite rotations on the whole texture then copying it again to a circular masked texture, and then doing a second copy for only solid tiles for masked rotated collisions on sprites. I'll be checking the masked pixels for my collision, and using raycasting possibly to check for collisions on those areas. The sprite will stay in the center, when this rotation happens. Here is a detailed diagram: http://i.stack.imgur.com/INf9K.gif I'll be using texture2D for steps 4-6 I suppose for steps 1 as well. Now ontop of that, the clipping size (IE the sqaure rendered) will be able to be shrunk or increased, on a per frame basis Therefore I can't use the same static size for my main texture2d and I can't use just the backbuffer Or we get the annoying flicker. Also I will have multiple instances of the renderer class so that I can freely pass textures around as if they are playing cards (in a sense) layering them ontop of eachother, cropping them how i want and such. and then using spritebatch to simply draw them at the locations I want. Hopefully this makes sense, and yes I will be planning on using alpha blending but only after all tiles have been drawn.. The masked collision is important and Yes I am avoiding using math on the tile rendering and instead resorting to image manipulation in video memory which is WHY I need this to work the way I'm intending it to work and not in the default way that XNA seems to handle graphics. Thanks to anyone willing to help. I hate the code form offered, because then I have to rely on static presence of an update function. What if I want to kill that update function or that object, but have it in memory, but just have it temporarily inactive? I'm making the assumption here the update function of one of these gamecomponents is automatic ? Anyways this is as detailed as I can make this post hopefully someone can help me solve the issue. Instead of tell me "derrr don't do it this wayyy" which is what a few people told me (but they don't understand the actual goal I have in mind) I'm trying to create basically a library where I can copy images freely no matter the size, i just have to specify the size in the function then as long as a reference to that object exists it should be kept alive? right? :/ anyways.. Anything else? I Don't know. I understand object oriented coding but I don't understand this XNA It's beggining to feel impossible to do anything custom in it without putting ALL my rendering code into the draw function of the main class tileClipping.new_texture(GraphicsDevice, width, height) tileClipping.Draw_texture(...)

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  • Include in service layer all the application's functions or only the reusable ones?

    - by BornToCode
    Background: I need to build a main application with some operations (CRUD and more) (-in winforms), I need to make another application which will re-use some of the functions of the main application (-in webforms). I understood that using service layer is the best approach here. If I understood correctly the service should be calling the function on the BL layer (correct me if I'm wrong) The dilemma: In my main winform UI - should I call the functions from the BL, or from the service? (please explain why) Should I create a service for every single function on the BL even if I need some of the functions only in one UI? for example - should I create services for all the CRUD operations, even though I need to re-use only update operation in the webform? YOUR HELP IS MUCH APPRECIATED

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  • Centos/OVH: public IP on KVM virtual machine

    - by Sébastien
    Since a few days, I'm trying to configure my KVM vm to have a public IP address, without any success. First, I'm on OVH, and you need to know they don't allow networking from different mac addresses. I have so registered a virtual mac address associated with my failover IP Here's my configuration: Guest wanted IP: 46.105.40.x Host IP: 176.31.240.x Host configuration dummy0 interface: ifcfg-dummy0 BOOTPROTO=static IPADDR=10.0.0.1 NETMASK=255.0.0.0 ONBOOT=yes NM_CONTROLLED=no ARP=yes BRIDGE=br0 br0 bridge: ifcfg-br0 DEVICE=br0 TYPE=Bridge DELAY=0 ONBOOT=yes BOOTPROTO=static IPADDR=192.168.1.1 NETMASK=255.255.255.0 PEERDNS=yes NM_CONTROLLED=no ARP=yes Failover ip is redirected to the br0 bridge with ip route add 46.105.40.xxx dev br0 > cat /proc/sys/net/ipv4/ip_forward 1 > cat /proc/sys/net/ipv4/conf/vnet0/proxy_arp 1 > route -n Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 176.31.240.254 0.0.0.0 UG 0 0 0 eth0 46.105.40.x 0.0.0.0 255.255.255.255 UH 0 0 0 br0 176.31.240.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 br0 Guest configuration: KVM: <interface type='bridge'> <mac address='02:00:00:30:22:05'/> <source bridge='br0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </interface> I've borrowed most of the OVH configuration here (in french, http://guides.ovh.com/BridgeClient) for the guest configuration eth0 interface: ifcfg-eth0 DEVICE="eth0" BOOTPROTO=none HWADDR="02:00:00:30:22:05" NM_CONTROLLED="yes" ONBOOT="yes" TYPE="Ethernet" UUID="e9138469-0d81-4ee6-b5ab-de0d7d17d1c8" USERCTL=no PEERDNS=yes IPADDR=46.105.40.xxx NETMASK=255.255.255.255 GATEWAY=176.31.240.254 ARP=yes For the routes, I have in route-eth0: 176.31.240.254 dev eth0 default via 176.31.240.254 dev eth0 With this configuration, I don't have any access to the internet. The only thing I can do is to ping the public ip of the host, nothing more. My final conclusion is that the route does not work, because, when, on the guest, I run ping 8.8.8.8, I have, on the host: > tcpdump -i vnet0 icmp tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on br0, link-type EN10MB (Ethernet), capture size 65535 bytes 13:38:09.009324 IP 46-105-40-xxx.kimsufi.com > google-public-dns-a.google.com: ICMP echo request, id 50183, seq 1, length 64 13:38:09.815344 IP 46-105-40-xxx.kimsufi.com > google-public-dns-a.google.com: ICMP echo request, id 50183, seq 2, length 64 I never get the ping reply, only the request. It seems Guest - Host communication is fine. On eth0: > tcpdump -i eth0 icmp tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes 13:39:40.240561 IP 46-105-40-xxx.kimsufi.com > google-public-dns-a.google.com: ICMP echo request, id 50439, seq 1, length 64 13:39:40.250161 IP google-public-dns-a.google.com > 46-105-40-xxx.kimsufi.com: ICMP echo reply, id 50439, seq 1, length 64 I have the request and the reply on eth0, but reply is not forwarded to the bridge. I really don't understand why, I though it was the aim of the route to do that! IPtables is disabled on both host and guest. I really hope some of you will be able to help me! Many thanks in advance, Sébastien

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  • virtual host setup: can't access wordpress site without www

    - by two7s_clash
    I would like to access my site both with and without using the www. Currently it only works with. Leaving out the www just goes to a blank page. Also, wp-admin just loads a blank page too. I have set an A record for mysite.com and www.mysite.com, both pointing to my static Bitnami IP. I also have a subdomain mapped to another directory that is working just fine (conference.mysite.com and www.conference.mysite.com). I'm using a Bitnami stack on an AWS EC2 micro instance. Here is my httpd.conf: ServerRoot "/opt/bitnami/apache2" Listen 80 LoadModule authn_file_module modules/mod_authn_file.so blah blah blah.... LoadModule php5_module modules/libphp5.so <IfModule !mpm_netware_module> <IfModule !mpm_winnt_module> User daemon Group daemon </IfModule> </IfModule> ServerAdmin [email protected] ServerName localhost:80 DocumentRoot "/opt/bitnami/apps/wordpress1/htdocs/" <Directory /> Options FollowSymLinks AllowOverride None Order deny,allow Allow from all </Directory> <Directory "/opt/bitnami/apps/wordpress1/htdocs/"> Options Indexes MultiViews +FollowSymLinks LanguagePriority en AllowOverride All Order allow,deny Allow from all </Directory> <IfModule dir_module> DirectoryIndex index.html index.php </IfModule> <FilesMatch "^\\.ht"> Order allow,deny Deny from all Satisfy All </FilesMatch> ErrorLog "logs/error_log" LogLevel warn <IfModule log_config_module> LogFormat "%h %l %u %t \\"%r\\" %>s %b \\"%{Referer}i\\" \\"%{User-Agent}i\\"" combined LogFormat "%h %l %u %t \\"%r\\" %>s %b" common <IfModule logio_module> LogFormat "%h %l %u %t \\"%r\\" %>s %b \\"%{Referer}i\\" \\"%{User-Agent}i\\" %I %O" combinedio </IfModule> CustomLog "logs/access_log" common </IfModule> <IfModule alias_module> ScriptAlias /cgi-bin/ "/opt/bitnami/apache2/cgi-bin/" </IfModule> <Directory "/opt/bitnami/apache2/cgi-bin"> AllowOverride None Options None Order allow,deny Allow from all </Directory> DefaultType text/plain <IfModule mime_module> TypesConfig conf/mime.types AddType application/x-compress .Z AddType application/x-gzip .gz .tgz </IfModule> Include conf/extra/httpd-mpm.conf <IfModule ssl_module> SSLRandomSeed startup builtin SSLRandomSeed connect builtin </IfModule> AddType application/x-httpd-php .php .phtml LoadModule wsgi_module modules/mod_wsgi.so WSGIPythonHome /opt/bitnami/python ServerSignature Off ServerTokens Prod AddType application/x-httpd-php .php PHPIniDir "/opt/bitnami/php/etc" Include "/opt/bitnami/apps/phpmyadmin/conf/phpmyadmin.conf" ExtendedStatus On <Location /server-status> SetHandler server-status Order Deny,Allow Deny from all Allow from localhost </Location> Include "/opt/bitnami/apache2/conf/bitnami/httpd.conf" Include "/opt/bitnami/apps/virtualhost.conf" Here is my virtual hosts file: NameVirtualHost *:80 <VirtualHost *:80> ServerAdmin xx DocumentRoot "/opt/bitnami/apps/wordpress1/htdocs" ServerName mbird.com ServerAlias www.mbird.com ErrorLog "logs/wordpress-error_log" CustomLog "logs/wordpress-access_log" common </VirtualHost> <Directory "/opt/bitnami/apps/wordpress1/htdocs"> Options Indexes MultiViews +FollowSymLinks AllowOverride All Order allow,deny Allow from all </Directory> ### WordPress conference.mbird.com configuration ### <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot "/opt/bitnami/apps/wordpress/htdocs" ServerName conference.mbird.com ServerAlias www.conference.mbird.com ErrorLog "logs/confwordpress-error_log" CustomLog "logs/confwordpress-access_log" common </VirtualHost> <Directory "/opt/bitnami/apps/wordpress/htdocs"> Options Indexes MultiViews +FollowSymLinks AllowOverride All Order allow,deny Allow from all </Directory> ###

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  • Just a few questions about Hyper-V virtual machines and clustering

    - by René Kåbis
    I have been using Microsoft’s Hyper-V technology for a little while now, but I am just now dipping my toe into clustering. In particular, I am trying to implement a fault-tolerant SQL DB. This involves setting up two VMs, clustering them via Failover Cluster, and then installing SQL Server in some fashion. I have two physical machines - one high-end and rather beefy “heavy lifter” to contain the majority of the VMs, and another “backup” (a repurposed desktop) to hold the essential “secondary” (or failover) AD-DC, SQL and FS VMs. The main reason why I find the failover cluster at the VM level so attractive is that it presents a single IP and DNS entry to the network as a whole - if one machine (physical or virtual) goes down, you might loose some ping and the connections get reset, but the network applications (Microsoft RMS connection to backend SQL) can still connect to a viable DB without having to mess around with the settings at all. My first question is in terms of SQL Server itself. If I have a cluster between two VMs, does it make more sense to install the SQL Server in Failover Cluster configuration or should I simply install it in a stand-alone config and mirror the DBs? For example, this post suggests just mirroring the DBs, but do I just mirror standalone DBs on standalone VMs, or can I get the network and failover benefits of clustered VMs while still utilizing (on each clustered VM) standalone DBs that have been mirrored between each other? As well, I have come across a lot of documentation about SQL clustering, but most assume a number (#2) of physical machines to hold not only the actual SQL VMs but also the Quorum and Witness stores. I will not be able to muster more than two physical machines. As such, I will have to be satisfied with a VM cluster that does not exceed two VMs (one for each physical machine). Another issue involves MSDTC - the Distributed Transaction Coordinator. When attempting to install the SQL Failover Cluster (I never completed it for this reason) it threw a hissy fit because MSDTC had not been clustered. Search as I might, I have not yet found a way to do so under Windows Server 2012 R2. I have found plenty of docs for Windows 2008 and 2008 R2, but these instructions don’t align with 2012 R2 (at least, not in a way that allows me to successfully cluster MSDTC). Plus, some of the instructions that I have found for SQL Server Failover Cluster installation suggest that a third “network device” - shared network storage (a SAN) - is required for the DB itself (and other functionality). I do not have this, and won’t be getting this. Most of my storage exists on the “heavy lifter” that was designed for all of the “primary” VMs. If that physical machine goes down, so does the storage. The secondary server does have enough resources for an AD-DC Server, an SQL server and a File Server, so it will handle the “secondary” failover versions of those VMs (clustered or not). My final question involves file servers. If I cluster file servers between two VMs (one on my “heavy lifter” and another on my “backup”, how do I mirror the data between them? Clustering VMs only provides a single point of access on the network for a resource, it doesn’t exactly replicate data between the two - that is left to the services that serve up that data. I am unsure how I can ensure that file server data between two clustered file server VMs can be properly mirrored. Remember, I only have two devices to be used here - my primary machine and a backup secondary. There is no chance of me obtaining a SAN or any other type of network attached storage. What exists on the machines must act as the storage. Thanks in advance for any suggestions.

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  • Call functions in AutoIt DLL using Python ctypes

    - by Josh
    I want to call functions from an AutoIt dll, that I found at C:\Program Files (x86)\AutoIt3\AutoItX\AutoItX3.dll using Python. I know I could use win32com.client.Dispatch("AutoItX3.Control") but I can't install the application or register anything in the system. So far, this is where I am: from ctypes import * path = r"C:\Program Files (x86)\AutoIt3\AutoItX\AutoItX3.dll" autoit = windll.LoadLibrary(path) Here are the methods that works: autoit.AU3_WinMinimizeAll() # windows were successfully minimized. autoit.AU3_Sleep(1000) # sleeps 1 sec. Here is my problem, python is crashing when I call other methods like this one. I get python.exe has stopped working from windows... autoit.AU3_WinGetHandle('Untitled - Notepad', '') And some other methods are not crashing python but are just not working. This one doesn't close the window and return 0: autoit.AU3_WinClose('Untitled - Notepad', '') And this other one return 1 but the window is still minimized: autoit.AU3_WinActivate('Untitled - Notepad', '') I've tested the examples with with Dispatch("AutoItX3.Control") and everything is working like expected. It seems like methods that should return something other than a string are crashing python. But still, others like WinClose are not even working... Thank you in advance for your help! EDIT: These methods are now working when using unicode strings: autoit.AU3_WinClose(u'Untitled - Notepad', u'') autoit.AU3_WinActivate(u'Untitled - Notepad', u'') And I found the prototype for AU3_WinGetHandle: AU3_API void WINAPI AU3_WinGetHandle(const char szTitle, /[in,defaultvalue("")]*/const char *szText, char *szRetText, int nBufSize); Now I see that I should get the handle from szRetText but I am not sure how... I tried the following without success: from ctypes.wintypes import LPCWSTR, INT, POINTER AU3_WinGetHandle.argtypes = (LPCWSTR, LPCWSTR, POINTER(LPCWSTR), INT) s = c_wchar_p() print AU3_WinGetHandle(u'Untitled - Notepad', u'', byref(s), 100) # prints 1 print s # prints c_wchar_p(u'') Any idea how to retrive the handle from szRetText?

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  • Invoking WCF functions using Reflection

    - by Jankhana
    I am pretty new to WCF applications. I have a WCF application that is using NetTcpBinding. I wanted to invoke the functions in WCF service using the System.Reflection's Methodbase Invoke method. I mean I wanted to Dynamically call the Function by passing the String as the Function name. Reflection works great for Web Service or a Windows application or any dll or class. So their is certain way to do this for WCF also but I am not able to find that. I am getting the Assembly Name than it's type everything fine but as we cannot create an instance of the Interface class I tried to open the WCF connection using the binding and tried to pass that object but it's throwing the exception as : "Object does not match target type." I have opened the connection and passed the object and type is of interface only. I don't know whether I'm trying wrong thing or in wrong way. Any idea how shall I accomplish this??? The NetTCPBinding all are properly given while opening the connection. And one more thing I am using WCF as a Windows Service using NETTCPBinding.

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  • Missing functions in ruby 1.8

    - by Adrian
    I have a ruby gem that I developed with ruby 1.9, and it works. With ruby 1.8, though, it says this when I try to run it: dyld: lazy symbol binding failed: Symbol not found: _RBIGNUM_SIGN Referenced from: /Users/Adrian/Desktop/num_to_bytes/ext/num_to_bytes/num_to_bytes.bundle Expected in: flat namespace dyld: Symbol not found: _RBIGNUM_SIGN Referenced from: /Users/Adrian/Desktop/num_to_bytes/ext/num_to_bytes/num_to_bytes.bundle Expected in: flat namespace Trace/BPT trap If I comment out the line that uses RBIGNUM_SIGN, it complains about other functions like rb_big_modulo. Some things work, like NUM2LONG. Here are some things I have tried: In http://github.com/ruby/ruby/blob/ruby_1_8_7/ruby.h, RBIGNUM_SIGN is defined. But in all versions of ruby I have tried, it is not there. I guessed that maybe it was defined in a different .h file. Knowing that Hpricot works with 1.8, I looked at http://github.com/hpricot/hpricot/blob/master/ext/hpricot_scan/hpricot_scan.h. It doesn't include any other files that #define it. Putting things like extern VALUE rb_big_modulo(VALUE x); at the beginning of my extension don't help. Using a brand new Ubuntu installation, I apt-getted ruby, tried to install the gem, and it didn't work either. Putting have_library 'ruby', 'rb_big_modulo' in my extconf.rb didn't work. As you can probably see, I am getting desperate (after weeks of trying things!). So, how can I get this to work? Here is the gem: http://rubygems.org/gems/num_to_bytes Here is the source: http://gist.github.com/404584

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  • script to search and replace deprecated functions

    - by user573881
    Hi, I am using the following script to search and replace the deprecated functions in a file with the newer ones. 5 for strFile in `ls deprecated_functions_search_and_replace.txt ` 6 do 7 sed "s/ereg_replace[^\(]*(\([^,]*\),/preg_replace\1('#'.\2.'#',/g" $strFile > temp_file 8 mv $strFile $strFile".bakup" 9 mv temp_file $strFile 10 11 sed "s/eregi[^\(]*(\([^,]*\),/preg_match\1('#'.\2.'#i',/g" $strFile > temp_file 12 mv $strFile $strFile".bakup" 13 mv temp_file $strFile 14 15 sed "s/ereg[^\(]*(\([^,]*\),/preg_match\1('#'.\2.'#',/g" $strFile > temp_file 16 mv $strFile $strFile".bakup" 17 mv temp_file $strFile 18 19 sed "s/split[^\(]*(\([^,]*\),/preg_split\1('#'.\2.'#',/g" $strFile > temp_file 20 mv $strFile $strFile".bakup" 21 mv temp_file $strFile 22 23 sed "s/mysql_escape_string/mysql_real_escape_string/g" $strFile > temp_file 24 mv $strFile $strFile".bakup" 25 mv temp_file $strFile 26 27 sed "s/set_magic_quotes_runtime(0)/\/\/set_magic_quotes_runtime(0)/g" $strFile > temp_file 28 mv $strFile $strFile".bakup" 29 mv temp_file $strFile 30 31 sed "s/ini_get('safe_mode')/false/g" $strFile > temp_file 32 mv $strFile $strFile".bakup" 33 mv temp_file $strFile 34 35 sed "s/session_register('\(.*\)')/$_SESSION['\1']=$\1/g" $strFile > temp_file 36 mv $strFile $strFile".bakup" 37 mv temp_file $strFile 38 39 sed "s/session_unregister('\(.*\)')/$_SESSION['\1']=''/g" $strFile > temp_file 40 mv $strFile $strFile".bakup" 41 mv temp_file $strFile 42 43 done However, when I run this script I am getting an error saying: sed: -e expression #1, char 60: invalid reference \2 on `s' command's RHS sed: -e expression #1, char 52: invalid reference \2 on `s' command's RHS sed: -e expression #1, char 50: invalid reference \2 on `s' command's RHS sed: -e expression #1, char 51: invalid reference \2 on `s' command's RHS I am unable to figure out whats going wrong. Someone please help me. Regards.

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  • codeigniter and OOP general question regarding calling functions, and the parent constuctor

    - by thrice801
    Ok so I have some gaps in my understanding of PHP OOP, classes and functions specifically, this whole constructor class deal. I use both Zend and CI but right now Im trying to figure this out in CI as it is less complicated. So all Im trying to do is understand how to call a function from a view page in code igniter. I understand that might go against MVC but Im working with an api and search results not from my database, so basically, I want to define a function in my class that I am able to call in one of my view pages.. and I keep getting "Fatal error: Call to undefined function functionname" error no matter what I try. I thought I just had to declare public function testing() { echo "testing testing 123; } but calling that from the view I get that error. Then I read something about having to go parent::Controller(); in the index of the class where the testing function also resides? But that didnt work either. Anyways, ya, can someone explain what I need to do in order to call the "testing()" function on one of my view pages? and clarification on the constructor class and what exactly parent::Controller() even does, would be much appreciated as well.

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  • The ORDER BY clause is invalid in views, inline functions, derived tables, subqueries, and common ta

    - by zurna
    I get "The ORDER BY clause is invalid in views, inline functions, derived tables, subqueries, and common table expressions, unless TOP or FOR XML is also specified." error with the following code. I initially had two tables, ADSAREAS & CATEGORIES. I started receiving this error when I removed CATEGORIES table. Select Case SIDX Case "ID" : SQLCONT1 = " AdsAreasID" Case "Page" : SQLCONT1 = " AdsAreasName" Case Else : SQLCONT1 = " AdsAreasID" End Select Select Case SORD Case "asc" : SQLCONT2 = " ASC" Case "desc" : SQLCONT2 = " DESC" Case Else : SQLCONT2 = " ASC" End Select ''# search feature ---> Select Case SEARCHFIELD Case "ID" : SQLSFIELD = "AND AdsAreasID" Case "Ads Areas" : SQLSFIELD = "AND AdsAreasName" Case Else : SQLSFIELD = "" End Select Select Case SEARCHOPER Case "eq" : SQLSOPER = " = " & SEARCHSTRING Case "ne" : SQLSOPER = " <> " & SEARCHSTRING Case "lt" : SQLSOPER = " <" & SEARCHSTRING Case "le" : SQLSOPER = " <= " & SEARCHSTRING Case "gt" : SQLSOPER = " >" & SEARCHSTRING Case "ge" : SQLSOPER = " >= " & SEARCHSTRING Case "bw" : SQLSOPER = " LIKE '" & SEARCHSTRING & "%' " Case "ew" : SQLSOPER = " LIKE '%" & SEARCHSTRING & "' " Case "cn" : SQLSOPER = " LIKE '%" & SEARCHSTRING & "%' " Case Else : SQLSOPER = "" End Select ''# search feature ---> SQL = "SELECT * FROM ( SELECT A.AdsAreasID, A.AdsAreasName, ROW_NUMBER() OVER (ORDER BY A.AdsAreasID) As Row" SQL = SQL & " FROM ADSAREAS A" SQL = SQL & " WHERE Row > ("& RecordsPageSize - RecordsPerPage &") AND Row <= ("& RecordsPageSize &") ORDER BY" & SQLCONT1 & SQLCONT2 Set objXML = objConn.Execute(SQL)

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  • Adding Functions to an Implementation of Vector

    - by Meursault
    I have this implementation of vector that I've been working on for a few days using examples from a textbook: #include <iostream> #include <string> #include <cassert> #include <algorithm> #include <cstring> // Vector.h using namespace std; template <class T> class Vector { public: typedef T * iterator; Vector(); Vector(unsigned int size); Vector(unsigned int size, const T & initial); Vector(const Vector<T> & v); // copy constructor ~Vector(); unsigned int capacity() const; // return capacity of vector (in elements) unsigned int size() const; // return the number of elements in the vector bool empty() const; iterator begin(); // return an iterator pointing to the first element iterator end(); // return an iterator pointing to one past the last element T & front(); // return a reference to the first element T & back(); // return a reference to the last element void push_back(const T & value); // add a new element void pop_back(); // remove the last element void reserve(unsigned int capacity); // adjust capacity void resize(unsigned int size); // adjust size void erase(unsigned int size); // deletes an element from the vector T & operator[](unsigned int index); // return reference to numbered element Vector<T> & operator=(const Vector<T> &); private: unsigned int my_size; unsigned int my_capacity; T * buffer; }; template<class T>// Vector<T>::Vector() { my_capacity = 0; my_size = 0; buffer = 0; } template<class T> Vector<T>::Vector(const Vector<T> & v) { my_size = v.my_size; my_capacity = v.my_capacity; buffer = new T[my_size]; for (int i = 0; i < my_size; i++) buffer[i] = v.buffer[i]; } template<class T>// Vector<T>::Vector(unsigned int size) { my_capacity = size; my_size = size; buffer = new T[size]; } template<class T>// Vector<T>::Vector(unsigned int size, const T & initial) { my_size = size; //added = size my_capacity = size; buffer = new T [size]; for (int i = 0; i < size; i++) buffer[i] = initial; } template<class T>// Vector<T> & Vector<T>::operator = (const Vector<T> & v) { delete[ ] buffer; my_size = v.my_size; my_capacity = v.my_capacity; buffer = new T [my_size]; for (int i = 0; i < my_size; i++) buffer[i] = v.buffer[i]; return *this; } template<class T>// typename Vector<T>::iterator Vector<T>::begin() { return buffer; } template<class T>// typename Vector<T>::iterator Vector<T>::end() { return buffer + size(); } template<class T>// T& Vector<T>::Vector<T>::front() { return buffer[0]; } template<class T>// T& Vector<T>::Vector<T>::back() { return buffer[size - 1]; } template<class T> void Vector<T>::push_back(const T & v) { if (my_size >= my_capacity) reserve(my_capacity +5); buffer [my_size++] = v; } template<class T>// void Vector<T>::pop_back() { my_size--; } template<class T>// void Vector<T>::reserve(unsigned int capacity) { if(buffer == 0) { my_size = 0; my_capacity = 0; } if (capacity <= my_capacity) return; T * new_buffer = new T [capacity]; assert(new_buffer); copy (buffer, buffer + my_size, new_buffer); my_capacity = capacity; delete[] buffer; buffer = new_buffer; } template<class T>// unsigned int Vector<T>::size()const { return my_size; } template<class T>// void Vector<T>::resize(unsigned int size) { reserve(size); my_size = size; } template<class T>// T& Vector<T>::operator[](unsigned int index) { return buffer[index]; } template<class T>// unsigned int Vector<T>::capacity()const { return my_capacity; } template<class T>// Vector<T>::~Vector() { delete[]buffer; } template<class T> void Vector<T>::erase(unsigned int size) { } int main() { Vector<int> v; v.reserve(2); assert(v.capacity() == 2); Vector<string> v1(2); assert(v1.capacity() == 2); assert(v1.size() == 2); assert(v1[0] == ""); assert(v1[1] == ""); v1[0] = "hi"; assert(v1[0] == "hi"); Vector<int> v2(2, 7); assert(v2[1] == 7); Vector<int> v10(v2); assert(v10[1] == 7); Vector<string> v3(2, "hello"); assert(v3.size() == 2); assert(v3.capacity() == 2); assert(v3[0] == "hello"); assert(v3[1] == "hello"); v3.resize(1); assert(v3.size() == 1); assert(v3[0] == "hello"); Vector<string> v4 = v3; assert(v4.size() == 1); assert(v4[0] == v3[0]); v3[0] = "test"; assert(v4[0] != v3[0]); assert(v4[0] == "hello"); v3.pop_back(); assert(v3.size() == 0); Vector<int> v5(7, 9); Vector<int>::iterator it = v5.begin(); while (it != v5.end()) { assert(*it == 9); ++it; } Vector<int> v6; v6.push_back(100); assert(v6.size() == 1); assert(v6[0] == 100); v6.push_back(101); assert(v6.size() == 2); assert(v6[0] == 100); v6.push_back(101); cout << "SUCCESS\n"; } So far it works pretty well, but I want to add a couple of functions to it that I can't find examples for, a SWAP function that would look at two elements of the vector and switch their values and and an ERASE function that would delete a specific value or range of values in the vector. How should I begin implementing the two extra functions?

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  • Two classes and inline functions

    - by klew
    I have two classes and both of them uses some of the other class, on example: // class1.h class Class1; #include "class2.h" class Class1 { public: static Class2 *C2; ... }; // class2.h class Class2; #include "class1.h" class Class2 { public: static Class1 *C1; ... }; And when I define it like in example above, it works (I also have some #ifndef to avoid infinite header recurency). But I also want to add some inline functions to my classes. And I read here that I should put definition of inline function in header file, because it won't work if I'll put them in cpp file and want to call them from other cpp file (when I do it I get undefined reference during linking). But the problem here is with something like this: // class1.h ... inline void Class1::Foo() { C2->Bar(); } I get error: invalid use of incomplete type ‘struct Class2’. So how can I do it?

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  • define javascript functions on iframe facebook app inside <fb:serverfbml> tag

    - by user233486
    Hi all, How we can define JS function on inside ? I tried to load file javascript on the end tag , but I still can't call the function from javascript file. Here the FBML tag <fb:serverfbml> <script type="text/fbml"> <fb:fbml> <a href="#" id="this" onclick="do_colors(this); return false">Hello World!</a> <script src="http://absolute.path.to/your/javascript/file.js"></script> </fb:fbml> </script> </fb:serverfbml> And here the javacript function on file.js function random_int(lo, hi) { return Math.floor((Math.random() * (hi - lo)) + lo) } function do_colors(obj) { var r = random_int(0, 255), b = random_int(0, 255), g = random_int(0, 255); obj.setStyle({background: 'rgb('+[r, g, b].join(',')+')', color: 'rgb('+[r<128?r+128:r-128, g<128?g+128:g-128, b<128?b+128:b-128].join(',')+')'}); } I use rails and facebooker to develop the application Any idea or suggestion for define javascript functions? Thanks,

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  • Vector of pointers to base class, odd behaviour calling virtual functions

    - by Ink-Jet
    I have the following code #include <iostream> #include <vector> class Entity { public: virtual void func() = 0; }; class Monster : public Entity { public: void func(); }; void Monster::func() { std::cout << "I AM A MONSTER" << std::endl; } class Buddha : public Entity { public: void func(); }; void Buddha::func() { std::cout << "OHMM" << std::endl; } int main() { const int num = 5; // How many of each to make std::vector<Entity*> t; for(int i = 0; i < num; i++) { Monster m; Entity * e; e = &m; t.push_back(e); } for(int i = 0; i < num; i++) { Buddha b; Entity * e; e = &b; t.push_back(e); } for(int i = 0; i < t.size(); i++) { t[i]->func(); } return 0; } However, when I run it, instead of each class printing out its own message, they all print the "Buddha" message. I want each object to print its own message: Monsters print the monster message, Buddhas print the Buddha message. What have I done wrong?

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  • getting the list of all functions executed like call stack in asp.net

    - by sridhar
    Hi, I am having trouble with debugging one of the problems that I am having in our website. This is the problem. I have a webpage that contains the photo of an employee and information related to the employee. When the user logins to our website, we are storing the details of the employee in session. I am setting the image url for the photo of an employee as follows. imgEEPhoto.ImageUrl = imgPhoto.aspx?Company=XXXX&Empno=YYYY. Inside the page imgPhoto.aspx, I am checking if the session is alive for that user. when I login to the page that has the employee photo sometimes the photo is not displayed. It is because I am checking whether the session is alive inside the imgPhoto.aspx page. sometimes the session is alive and sometimes the session is not alive. It looks like there is some function that is setting the session to null asynchronously. I am not knowing how to track that function. so I am thinking that inside the imgPhoto.aspx page, if I can get the list of all functions that have been executed so far, I could track the function that is resetting the session. Is there a way to find this? If there is no another way to debug this problem, please let me know. Thanks, sridhar.

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