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  • SQL Server 2008 is not accessible from Windows Server 2008 ?

    - by Albert Widjaja
    Hi, I have successfully configured Windows Server 2008 Enterprise SP2 with SQL Server 2008 Enterprise SP2 all 64 bit, however when I tried to access this particular SQL Server 2008 DB instance from another SQL Server 2008 SSMS in another Windows Server 2008 it failed ? what I did is to disabled the IPv6 IP address using the regedit but still the problem hasn't been fixed even after restart ? I have enabled the named piped as well but still no luck ? any help please ? Here's the error message: " A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) (Microsoft SQL Server, Error: -1) "

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  • How to either completely remove SQL Server 2008 R2 Installation or repair it?

    - by Nico
    I've installed MSSQL server correctly, then I took some wrong turns and I'm now left in a pretty undesirable state. I wanted to change the server instance to another drive, so I uninstalled SQL server and all of it's features from the Programs and Features control panel. Now when I tried to install a new instance, I got a few errors, but it still installed most of them: Then I tried to run a repair, which I figured would fix things, but it throws an exception about not being able to read something from the CD (tried more than once always the same exception) Error 1316.A network error occurred while attempting to read from the file R:\1033_ENU_LP\x64\setup\SSCERuntime_x86-enu.msi , and it fails to repair a few of the features: And I don't have the server instance installed either. So I'm left with no MSSQLMS, no server instance, and no happiness. What would be the best course of action here?

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  • SQL Server Instancing: Should I use multiple instances or databases?

    - by Spence
    I have a reasonable server connected to a SAN which will be running SQL servers for multiples of the same application. There are no security issues with one application being able to read anothers database. We are unfortunately in 32 bit windows as well. I'm of the opinion that it would be better to use one instance on the server, enable AWE so that the server instance can use almost all of the ram we have and then run each of the databases in the one instance. However I've been overruled by the gods of the IT department on this one, so I'm really curious to hear your thoughts on this. From a performance point of view, am I incorrect that one instance of SQL is better than two? I know that we could do some failover stuff, but doing that on one blade only seems like overkill to me..

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  • Static classes and/or singletons -- How many does it take to become a code smell?

    - by Earlz
    In my projects I use quite a lot of static classes. These are usually classes that naturally seem to fit into a single-instance type of thing. Many times I use static classes and recently I've started using some singletons. How many of these does it take to become a code smell? For instance, in my recent project which has a lot of static classes is an Authentication library for ASP.Net. I use a static class for a helper class that fixes ASP.Net error codes so it can be used like CustomErrorsFixer.Fix(Context); Or my authentication class itself is a static class //in global.asax's begin_application Authentication.SomeState="blah"; Authentication.SomeOption=true; //etc //in global.asax's begin_request Authentication.Authenticate(); When are static or singleton classes bad to use? Am I doing it wrong, or am I just in a project that by definition has very little per-instance state associated with it? The only per-instance state I have is stored in HttpContext.Current.Items like so: /// <summary> /// The current user logged in for the HTTP request. If there is not a user logged in, this will be null. /// </summary> public static UserData CurrentUser{ get{ return HttpContext.Current.Items["fscauth_currentuser"] as UserData; //use HttpContext.Current as a little place to persist static data for this request } private set{ HttpContext.Current.Items["fscauth_currentuser"]=value; } }

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  • Purpose of "new" keyword

    - by Channel72
    The new keyword in languages like Java, Javascript, and C# creates a new instance of a class. This syntax seems to have been inherited from C++, where new is used specifically to allocate a new instance of a class on the heap, and return a pointer to the new instance. In C++, this is not the only way to construct an object. You can also construct an object on the stack, without using new - and in fact, this way of constructing objects is much more common in C++. So, coming from a C++ background, the new keyword in languages like Java, Javascript, and C# seemed natural and obvious to me. Then I started to learn Python, which doesn't have the new keyword. In Python, an instance is constructed simply by calling the constructor, like: f = Foo() At first, this seemed a bit off to me, until it occurred to me that there's no reason for Python to have new, because everything is an object so there's no need to disambiguate between various constructor syntaxes. But then I thought - what's really the point of new in Java? Why should we say Object o = new Object();? Why not just Object o = Object();? In C++ there's definitely a need for new, since we need to distinguish between allocating on the heap and allocating on the stack, but in Java all objects are constructed on the heap, so why even have the new keyword? The same question could be asked for Javascript. In C#, which I'm much less familiar with, I think new may have some purpose in terms of distinguishing between object types and value types, but I'm not sure. Regardless, it seems to me that many languages which came after C++ simply "inherited" the new keyword - without really needing it. It's almost like a vestigial keyword. We don't seem to need it for any reason, and yet it's there. Question: Am I correct about this? Or is there some compelling reason that new needs to be in C++-inspired memory-managed languages like Java, Javascript and C#?

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  • Cloud computing - database loading question

    - by workwise
    Following is the situation, I want to know whether what I want is possible in cloud computing and is it the best way for me: 1) My main site has a Database with tables with millions of rows, and entries are added almost every second. 2) I will setup a mysql mirror, so there will be a backup database always in sync with the main one. 3) There are few tens of thousands of images- growing. So say total size of images few tens of gigabytes. I will be keeping the image data also in sync on the backup server. 4) There can be short periods where traffic can go 100X the average traffic. 5) I will be using memcache heavily - most database and even frequently used disk files/images will be in RAM. I want that the main site runs on a dedicated server. The backup server is say an Amazon EC2 instance. Now note that since it is live backup, I need to run a small instance continuously. I want that when I anticipate high traffic, I should be able to run a large instance on the cloud and transfer the traffic there. The main point is - I do not want to spend time in "loading" the database on the large instance, as it typically can take few minutes or even hours (experience). So is it possible to just scale the memory/CPU on demand, and not having to load the database or sync up the filesystem? I want to setup my backup scripts etc just ONCE. Thanks JP

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  • Running two instances of VisualSVN Server on one machine?

    - by Greg
    Is it possible to run more than one instance of VisualSVN Server on a single machine? I would like to have one instance accessible only from the local network (blocked on firewall) and the other one accessible from the Internet. I attempted to run the installer again but it refers to the already installed instance.

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  • How do I start DB2 on an Amazon EC2 Volume?

    - by Spike Williams
    I've got an instance of DB2 installed as part of an IBM WebSphere Portal development AMI on the Amazon EC2 cloud. Its installed a separate, persistent file system from the rest of the AMI. Yesterday, the AMI was terminated, and DB2 went down as part of that. It was not shut down cleanly, just terminated. Today, I am trying to restart the WebSphere portal server, which needs to connect to the DB2 instance. But the DB2 instance is down. So I need to restart my DB2 instance, but how to do that is not immediately obvious. Can someone tell me what I need to run to get it going again? OS is SuSE Linux, DB2 version is 9.1

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  • starting oracle database automatically.

    - by Searock
    I am using Fedora 8 and Oracle 10g Express Edition. Every time I start my fedora I have to click on start database. How can I add startdb.sh to startup so that it automatically executes when Fedora starts? I have tried adding the path to /etc/rc.d/rc.local but it still doesn't work. ./usr/lib/oracle/xe/app/oracle/product/10.2.0/server/config/scripts/startdb.sh I have even tried to add this script in /etc/init.d/oracle #!/bin/bash # # Run-level Startup script for the Oracle Instance and Listener # # chkconfig: 345 91 19 # description: Startup/Shutdown Oracle listener and instance ORA_HOME="/u01/app/oracle/product/9.2.0.1.0" ORA_OWNR="oracle" # if the executables do not exist -- display error if [ ! -f $ORA_HOME/bin/dbstart -o ! -d $ORA_HOME ] then echo "Oracle startup: cannot start" exit 1 fi # depending on parameter -- startup, shutdown, restart # of the instance and listener or usage display case "$1" in start) # Oracle listener and instance startup echo -n "Starting Oracle: " su - $ORA_OWNR -c "$ORA_HOME/bin/lsnrctl start" su - $ORA_OWNR -c $ORA_HOME/bin/dbstart touch /var/lock/subsys/oracle echo "OK" ;; stop) # Oracle listener and instance shutdown echo -n "Shutdown Oracle: " su - $ORA_OWNR -c "$ORA_HOME/bin/lsnrctl stop" su - $ORA_OWNR -c $ORA_HOME/bin/dbshut rm -f /var/lock/subsys/oracle echo "OK" ;; reload|restart) $0 stop $0 start ;; *) echo "Usage: $0 start|stop|restart|reload" exit 1 esac exit 0 and even this doesn't work. startdb.sh is located at /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/config/scripts/startdb.sh Thanks.

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  • AWS EC2: How to determine whether my EC2/scalr AMI was hacked? What to do to secure it?

    - by Niro
    I received notification from Amazon that my instance tried to hack another server. there was no additional information besides log dump: Original report: Destination IPs: Destination Ports: Destination URLs: Abuse Time: Sun May 16 10:13:00 UTC 2010 NTP: N Log Extract: External 184.xxx.yyy.zzz, 11.842.000 packets/300s (39.473 packets/s), 5 flows/300s (0 flows/s), 0,320 GByte/300s (8 MBit/s) (184.xxx.yyy.zzz is my instance ip) How can I tell whether someone has penetrated my instance? What are the steps I should take to make sure my instance is clean and safe to use? Is there some intrusion detection techinque or log that I can use? Any information is highly appreciated.

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  • Recommened design pattern to handle multiple compression algorithms for a class hierarchy

    - by sgorozco
    For all you OOD experts. What would be the recommended way to model the following scenario? I have a certain class hierarchy similar to the following one: class Base { ... } class Derived1 : Base { ... } class Derived2 : Base { ... } ... Next, I would like to implement different compression/decompression engines for this hierarchy. (I already have code for several strategies that best handle different cases, like file compression, network stream compression, legacy system compression, etc.) I would like the compression strategy to be pluggable and chosen at runtime, however I'm not sure how to handle the class hierarchy. Currently I have a tighly-coupled design that looks like this: interface ICompressor { byte[] Compress(Base instance); } class Strategy1Compressor : ICompressor { byte[] Compress(Base instance) { // Common compression guts for Base class ... // if( instance is Derived1 ) { // Compression guts for Derived1 class } if( instance is Derived2 ) { // Compression guts for Derived2 class } // Additional compression logic to handle other class derivations ... } } As it is, whenever I add a new derived class inheriting from Base, I would have to modify all compression strategies to take into account this new class. Is there a design pattern that allows me to decouple this, and allow me to easily introduce more classes to the Base hierarchy and/or additional compression strategies?

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  • BizTalk 2009 - Error when Testing Map with Flat File Source Schema

    - by StuartBrierley
    I have recently been creating some flat file schemas using the BizTalk Server 2009 Flat File Schema Wizard.  I have then been mapping these flat file schemas to a "normal" xml schema format. I have not previsouly had any cause to map flat files and ran into some trouble when testing the first of these flat file maps; with an instance of the flat file as the source it threw an XSL transform error: Test Map.btm: error btm1050: XSL transform error: Unable to write output instance to the following <file:///C:\Documents and Settings\sbrierley\Local Settings\Temp\_MapData\Test Mapping\Test Map_output.xml>. Data at the root level is invalid. Line 1, position 1. Due to the complexity of the map in question I decided to created a small test map using the same source and destination schemas to see if I could pinpoint the problem.  Although the source message instance vaildated correctly against the flat file schema, when I then tested this simplified map I got the same error. After a time of fruitless head scratching and some serious google time I figured out what the problem was. Looking at the map properties I noticed that I had the test map input set to "XML" - for a flat file instance this should be set to "native".

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  • Why do memory-managed languages retain the `new` keyword?

    - by Channel72
    The new keyword in languages like Java, Javascript, and C# creates a new instance of a class. This syntax seems to have been inherited from C++, where new is used specifically to allocate a new instance of a class on the heap, and return a pointer to the new instance. In C++, this is not the only way to construct an object. You can also construct an object on the stack, without using new - and in fact, this way of constructing objects is much more common in C++. So, coming from a C++ background, the new keyword in languages like Java, Javascript, and C# seemed natural and obvious to me. Then I started to learn Python, which doesn't have the new keyword. In Python, an instance is constructed simply by calling the constructor, like: f = Foo() At first, this seemed a bit off to me, until it occurred to me that there's no reason for Python to have new, because everything is an object so there's no need to disambiguate between various constructor syntaxes. But then I thought - what's really the point of new in Java? Why should we say Object o = new Object();? Why not just Object o = Object();? In C++ there's definitely a need for new, since we need to distinguish between allocating on the heap and allocating on the stack, but in Java all objects are constructed on the heap, so why even have the new keyword? The same question could be asked for Javascript. In C#, which I'm much less familiar with, I think new may have some purpose in terms of distinguishing between object types and value types, but I'm not sure. Regardless, it seems to me that many languages which came after C++ simply "inherited" the new keyword - without really needing it. It's almost like a vestigial keyword. We don't seem to need it for any reason, and yet it's there. Question: Am I correct about this? Or is there some compelling reason that new needs to be in C++-inspired memory-managed languages like Java, Javascript and C#?

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  • Where is the network connection enabled/disabled setting stored?

    - by minerj
    I have an Amazon EC2 instance of Windows Server 2008 where some genius managed to disable the network connection so that the instance is now isolated in its own little universe. I can shut down the instance and edit the "C:\" drive volume by attaching it to another running instance. This is equivalent to removing the system drive from a dead machine and attaching it to another computer to edit the files. Question: Where is the network connection enabled / disabled setting stored? If I can tweak this setting by editing the registry or a file to re-enable the network connection, I can then resurrect my Amazon server.

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  • How to implement child-parent aggregation link in C++?

    - by Giorgio
    Suppose that I have three classes P, C1, C2, composition (strong aggregation) relations between P <>- C1 and P <>- C2, i.e. every instance of P contains an instance of C1 and an instance of C2, which are destroyed when the parent P instance is destroyed. an association relation between instances of C1 and C2 (not necessarily between children of the same P). To implement this, in C++ I normally define three classes P, C1, C2, define two member variables of P of type boost::shared_ptr<C1>, boost::shared_ptr<C2>, and initialize them with newly created objects in P's constructor, implement the relation between C1 and C2 using a boost::weak_ptr<C2> member variable in C1 and a boost::weak_ptr<C1> member variable in C2 that can be set later via appropriate methods, when the relation is established. Now, I also would like to have a link from each C1 and C2 object to its P parent object. What is a good way to implement this? My current idea is to use a simple constant raw pointer (P * const) that is set from the constructor of P (which, in turn, calls the constructors of C1 and C2), i.e. something like: class C1 { public: C1(P * const p, ...) : paren(p) { ... } private: P * const parent; ... }; class P { public: P(...) : childC1(new C1(this, ...)) ... { ... } private: boost::shared_ptr<C1> childC1; ... }; Honestly I see no risk in using a private constant raw pointer in this way but I know that raw pointers are often frowned upon in C++ so I was wondering if there is an alternative solution.

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  • How to configure Amazon Security Groups to achieve multi-tier architecture?

    - by ks78
    What is the preferred way to configure Amazon Security Groups to achieve a multi-tier architecture? Each of my instances has its own Security Group, which I only want to use for rules specific to an instance. I'd like to keep any rules which apply to multiple instances in a separate Security Group, which can then be assigned to instance Security Groups as necessary. As an example, I've setup a group called "admin", which allows administrative access from my IP. I added the "admin" group as the source to each of my instance security groups. However, I still can't access the instances from my IP without adding the rules directly to the instance's group. Am I missing something? Although it seems a multi-tier security architecture should be possible, it doesn't seem to be working.

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  • EC2 instances keep becoming inaccessible via SSH, can I use elastic loadbalancer to check SSH connectivity?

    - by Rick
    This is mainly an issue for my development ec2 server as it seems that my instance keeps becoming inaccessible via SSH. It happened yesterday so I killed that one and started a new one and happened again later today. The server still works, my web application is accessible in a web browser but whenever I try to connect via SSH I get a pemrission denied (public key) error message in my terminal. I am 100% sure I am doing nothing wrong as I can create a new instance of the exact same AMI (its a personal custom AMI), change absolutely nothing, including using the same .pem key, and then am able to SSH into that new instance using the exact same command as before (just changing the IP address). I understand that ec2 can have issues but having this happen every day seems a bit odd.. I am using an m2.xlarge instance so I don't know if these tend to be unstable, in the past I have used a small instance and had it running for months with no problems which is why I find this so odd. I am looking into using loadbalancing but it seems the only "health" checks they offer is for http or tcp so I'm not sure if I can make it monitor for SSH connectivity. This is important for development as I may make 1-2 new pushes of an application a day and use SSH to do this. I have a designer that needs to have the app always accessible as he works with the front-end files to test output with the live application. Anyways, any advice / info is appreciated

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  • root locked out of EC2

    - by Paco
    I was in the process of disabling root logins on an AWS EC2 instance. Right after setting PermitRootLogin no and restarting sshd, I closed the terminal on accident -- before setting up users with sudo privileges. The result is that my key to get into the instance as root does not work (sshd forbids it) and when I log into the instance using my regular user I can't gain root privileges (the root password was never set). The instance is running ubuntu 8.10. Anyone have any idea how can I fix this?

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  • Debugging logrotate postrotate script

    - by robert
    Following is my logrotate conf. /mnt/je/logs/apache/jesites/web/*.log" { missingok rotate 0 size 5M copytruncate notifempty sharedscripts postrotate /home/bitnami/.conf/compress-and-upload.sh /mnt/je/logs/apache/jesites/web/ web endscript } And compress-and-upload.sh script, #!/bin/sh # Perform Rotated Log File Compression tar -czPf $1/log.gz $1/*.1 # Fetch the instance id from the instance EC2_INSTANCE_ID="`wget -q -O - http://169.254.169.254/latest/meta-data/instance-id`" if [ -z $EC2_INSTANCE_ID ]; then echo "Error: Couldn't fetch Instance ID .. Exiting .." exit; else /usr/local/bin/s3cmd put $1/log.gz s3://xxxx/logs/$(date +%Y)/$(date +%m)/$(date +%d)/$2/$EC2_INSTANCE_ID-$(date +%H:%M:%S)-$2.gz fi # Removing Rotated Compressed Log File rm -f $1/log.gz The files are rotated, but shell script is not executed. I don't know how to debug the postscript. Is there any logfile I chek to see if there is any permission issues. If i directly execute the script from commandline file upload works. Thanks.

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  • File replication among EC2 instances

    - by Peuge
    I am pretty new to AWS so please excuse my ignorance. We are wanting to have a setup whereby we have a SQL DB instance + web server instance. However we would like the Web server to sit behind an ELB thus allowing us to use Autoscaling. My question however is how to we replicate the web app across instances? Say for example we have two web servers running and we need to make a critical update to the web app, ultimately we would only want to upload to one instance and not both. Is it even best practice to store your web app on the instance or are there better ways to store and share the app between instances?

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  • Run serveral daemon using python

    - by ylc
    I noticed that serveral daemon invoked python seperately. For example, I have both wicd and ibus daemon running on my machine. Instead of launching a single instance of python, the daemons run with two python instance at the same time in htop: /usr/bin/python2 -O /usr/share/wicd/daemon/monitor.py python2 /usr/share/ibus/ui/gtk/main.py Is it a waste of doing that? If yes, how can I improve this? If no, why avoid putting all daemons run on a single python instance?

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  • Connection String Incorrectly Formatted [migrated]

    - by Randy E
    I'm running into some issues. Every time I launch into debug mode and hit the "Create User" button, I'm getting an exception being thrown that is due to the Connection String either being in the wrong syntax or just wrong. Using Visual Studio 2010, project is .NET 3.5 with SQL 2008 Express. This is just a personal project that I'm testing some other things with, I know this generally isn't the recommended format but for a personal small project, I don't see the point in doing it any other way. The things I'm testing actually work :) Data Source=.\SQLEXPRESS;AttachDbFilename=|Data Directory|ASPAppDatabase.mdf;Integrated Security=True;User Instance=True That doesn't work. Data Source=.\SQLEXPRESS;AttachDbFilename="|Data Directory|ASPAppDatabase.mdf";Integrated Security=True;User Instance=True Neither does that. Data Source=.\SQLEXPRESS;AttachDbFilename='|Data Directory|ASPAppDatabase.mdf';Integrated Security=True;User Instance=True And again, neither does that :/ However, rather than using "|Data directory| if I use the full path to the local DB file it works just fine and no exception is thrown, and I can read and write as I need. And just to cover all my bases, here is the button click event that creates the User. protected void btnAddUser_Click(object sender, EventArgs e) { Membership.CreateUser(txtUserName.Text, txtPassword.Text); btnLogin_Click(sender, e); } So, what am I missing in regards to the |Data Directory|? Here is an example of the above not working correctly..taken directly from web.config. <add name="ASPAppDatabaseConnection" connectionString='Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|ASPAppDatabase.mdf;Integrated Security=True;User Instance=True'/>

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  • How to configure Amazon Security Groups to achieve multi-tier architecture?

    - by ks78
    What is the preferred way to configure Amazon Security Groups to achieve a multi-tier architecture? Each of my instances has its own Security Group, which I only want to use for rules specific to an instance. I'd like to keep any rules which apply to multiple instances in a separate Security Group, which can then be assigned to instance Security Groups as necessary. As an example, I've setup a group called "admin", which allows administrative access from my IP. I added the "admin" group as the source to each of my instance security groups. However, I still can't access the instances from my IP without adding the rules directly to the instance's group. Am I missing something? Although it seems a multi-tier security architecture should be possible, it doesn't seem to be working.

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  • Error running Solr

    - by Jon H
    I'm trying to install Apache Solr for Plone, via collective.solr. I've followed the instructions above, and extended my buildout with: [buildout] extends = buildout.cfg https://github.com/Jarn/collective.solr/raw/master/buildout/solr.cfg [instance] eggs += collective.solr bin/buildout runs fine, however, when I try bin/solr-instance fg I get the following error: Traceback (most recent call last): File "bin/solr-instance", line 114, in <module> start(False) File "bin/solr-instance", line 43, in start stdout=logfp, stderr=logfp).pid File "/usr/lib/python2.6/subprocess.py", line 633, in __init__ errread, errwrite) File "/usr/lib/python2.6/subprocess.py", line 1139, in _execute_child raise child_exception OSError: [Errno 2] No such file or directory Graceful stop What am I missing / doing wrong?

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