http://sqlknowledge.com/2014/04/sql-2014-express-edition-limitations/
On this website, the author says SQL Server express 2014's Max instance per server is 50. Does it mean only 50 users can connect to the server, or access the server at the same time?
So, if I'm building a data-driven website(using ASP.NET C#) that inserts/retrieves data from SQL Server 2014 express, only 50 users can log onto my website at the same time??
Thanks
It means that the maximum number of SQL server installations (instances) on a single server is 50. Typically, you will only use 1 instance for an application.
An Instance of a SQL Server on a PC/Computer/Server means when you inserted the CD and installed SQL Server (Application) on the machine.
Each time you Install SQL Server (Application) on a PC it installs an INSTANCE of SQL Server.
Each time you install an Instance you have to give it a Name. It will be the Instance name.
When you are installing SQL Server it gives you the option of giving it a Name or pick the Default name for the installation.
If it is a Default instance you will connect to it by using only the MachineName.
If it is a Named Instance you will connect it to using the MachineName\InstanceName.
There can be only ONE Default Instance of SQL Server on a machine and Multiple Named instances (in Sql Server 2014 case 49) and obviously one named instance.
The maximum number of user to connect to SQL Server can be checked by looking at
In Object Explorer, right-click a server and click Properties.
Click the Connections node.
Under Connections, in the Max number of concurrent connections
Important Note
SQL Server being a resource hungry monster, it is best to keep only one instance of sql server on a machine. Otherwise your one instance of SQL Server can starve other instances of resources (memory, CPU) .
Related
We have 2 servers (UNIX) in our Organization. First is a Database Server and the second one, Application Server. We created a SQL*Loader Concurrent Program Executable. We have also entered the path in Concurrent Program. The path is available in both Database Server and Application Server.
The query is,
When we run Oracle EBS application, will it search the file in the Application Server or the Database Server
Suppose if it is searching in the Application Server, is there a way to direct Oracle EBS application to search the Database Server instead of the Application Server? Can such setting be done in Concurrent Program?
regards
Shabuddin
I've installed BizTalk 2013 Standard on a dedicated server. SQL is set up as an active / passive cluster (there are 2 virtual machines set aside for this) i.e. SQLDB1, SQLDB2. Now while configuring BizTalk, do I need to mention SQLDB1, SQLDB2 or cluster DNS name? If cluster DNS name, then how do I find this?
From Clustering the BizTalk Server Databases
Procedures for Clustering the Databases
Make sure you meet the following prerequisites before you start
clustering the BizTalk Server databases. When you create the domain
groups for your BizTalk Server environment, you must create global
domain accounts.
Configure the SQL Server cluster before you install and configure
BizTalk Server. For more information about clustering SQL Server 2008
R2, see Getting Started with SQL Server 2008 R2 Failover Clustering
(http://go.microsoft.com/fwlink/?LinkId=156820).
If you are also clustering the master secret server, configure that
server first. For more information about high availability for
Enterprise Single Sign-On, see High Availability for the Master Secret Server.
To run the BizTalk Server Configuration Wizard
Install BizTalk Server 2010 on a runtime server.
Launch the BizTalk Server Configuration program. Click Start, point to Programs, point to Microsoft BizTalk Server 2010, and then click
BizTalk Server Configuration.
To apply a custom configuration, follow the steps in Working with the Custom Configuration Manager
(http://go.microsoft.com/fwlink/?LinkId=156822) in BizTalk Server
Help. To specify the SQL Server cluster for the BizTalk Server
databases enter the name of the SQL Server cluster in the
Databases dialog of the configuration.
Complete the BizTalk Server configuration by following the instructions in Custom Configuration
(http://go.microsoft.com/fwlink/?LinkId=156823) in BizTalk Server
Help.
Launch "Cluster Administrator" on any one of the SQL Server nodes i.e. SQLDB1 or SQLDB2
Take a look at the SQL Cluster group properties and see what the "Network Name" is.
If you hadn't provided a network name prior to now, you should do so now.
This is the name you should use to connect to your SQL cluster. You could test this out using SQL Management Studio to be sure.
Best of Luck
My whole project is a Default.aspx and a web.config. When I go to add new item > SQL Server Database, I get this error:
I have looked around the internet for the past couple of hours and I just can't find anything (please keep in mind I am still a beginner so simple, detailed explanations are very welcome).
This error means either:
a) You do not have Sql Server Express installed.
b) Sql Server is installed but isn't running, use Start -> View Local Services to start it up.
c) Sql Server is installed and running, but is not configured to allow connections. Use Start -> Sql server configuration manager to enable TCP/IP or named pipe connections.
d) Sql Server is installed and running and allows connections, but your firewall software is not configured to allow connections to Sql Server.
d) You have mistyped the Data Source value in your connection string, the default instance name for Sql Express is usually ".\SQLEXPRESS"
Configuration Tool Screenshot:
I'm trying to place a .mdf database on a Computer A and access it simultaneously on Computer B but I'm having an error that says I cannot access the mdf file because it's being used by another process.
The setup is, the database is hosted on a Public folder in Computer A. I have Visual Studio running on both computers, and Computer B accesses the database on Computer A.
Computer A Connection path string:
C:\Users\Public\database.mdf
Computer B Connection path string:
\192.168.254.8\Public\database.mdf
Is there some sort of setting that I do not know of to enable multiple access on a db? Or this is not possible?
EDIT:
Let me rephrase my question, sorry.
There are two computers connected via a network, and I want to access one Visual Studio solution/project website. I wanted to do this as a demonstration, is it possible?
You should have an instance of SQL Server (even express) running on the host machine.
All requests from the clients should use the standard mechanisms for connecting to that server instance. In other words, they won't run their own copy of SQL Server, instead they will connect to the instance running on the host machine.
Simultaneous or direct access to Database files under any DBMS control either a very bad practice or simply impossible.
Use proper DBMS tools to access the data.
And yes - its possible to access Web site project for demo.
Install SQL Server on the host machine (the one that you want to keep your database on).
Then in Visual Studio, use the "Server Explorer" to locate the remote instance of the database. From there, you can utilize the remote instance of SQL Server in your connection string, thus allowing you to connect multiple computers to a single database.
Using two instances of SQL Server to connect to the single .mdf file is a very bad practice.
Instead of specifying the MDF file in your connection string (which, I believe, uses a form of User Instancing), you should use SQL Server Management Studio (SSMS) to attach the MDF. Then connect to SQL Server, rather than to the MDF.
You may need to move the MDF and LDF files to a place where the SQL Server identity can access them, rather than keeping them in your VS project.
Most projects keep scripts to create the DB in their VS project, but not the binary MDF itself.
When you deploy, the process is similar: use SSMS to attach the MDF on your server.
Yes, If 2 or More Computers are connected by networks like LAN You can access the Database Database1.mdf (say) from another SQL Server by entering its user name / Password /by Visual studio connection.
Disadvantages:
If more than 7~8 systems are accessing same Database same time System response slows down and Hangs up or may result error like connection pool exceeded or Device not responding..
In Big Companies they use Huge Multi-core & Multi-Processer based sever which will respond faster.
Overcome: while writing Applications Use Connection Open and Close Particularly while executing the SQL queries in other time it should be closed.
Best Programer uses Transaction instead of using normal methods. Transaction Makes Every User Access Database With valid and successful Execution of queries. These Queries (Transaction Queries) mainly executes on client machine and later updates the same over Main server when it got Time slot for it(synchronize).
I am trying to connect an ASP.NET 2.0 application hosted on a client machine to an SQL server 2000 instance which is installed on a domain controller running windows server 2003 (I appreciate this is not best practise, but it is something I cannot change). I am using SQL server authentication, not Windows authentication.
During debugging, the following error is displayed at the point the 'connection' is attempted within the web application (not on running any object within Sql Server):
"An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)"
I have done some research, and have checked a variety of things:
1) I am certain the conection string is correct - in fact I built a little Windows app that uses the same connection information and connection succeeds...
2) This is limited to the web application - a windows application running on the remote client machine connects just fine using the same connection string (see 1).
3) The firewall settings on both computers do not prevent the connection (see 1).
4) I can ping the windows 2003 server (see 1)
5) The SQL Server credentials definitely have the rights to the objects needed
6) If I (temporarily) put the web application on the windows server 2003 and run it, it loads and runs fine (using a browser on a separate machine, or on the client machine I am trying to connect) - suggesting this is only an issue with a remote connection, and confirming the connectivity between the machines again, and also confirming the necessary security right of the SQL Server user.
7) I can start query analyser on the client machine and using the same SQL server credentials, can run the same queries on the target database just fine.
Stumped. Please help!
You need to go into the SQL Server Configuration Manager and make sure the Named Pipes option is turned on. It is not turned on by default when you install SQL Server.
Because of the research I did in the original question covering the ability of a windows app to connect but not the ASP.NET app to connect from the same machine, and the confirmation the web app was working on the server itself, I was convinced SQL server was set up correctly, that connectivity and firewalls were not a problem - it must have been a difference in the security credentials of the windows app versus the web app.
The windows app runs in the security credentials of the logged on windows user and authenticates using that, whereas the webapp runs in a restricted account and does not pass these credentials over when connecting to SQL server by default. I simply added to web.config, which impersonates the user account within which the web app runs, and it all worked!
Problem solved.