Is it possible to bind a named instance of SQL server to a sepcific IP address so that it is accessible just by IP address without the instance name?
For example, suppose I have two IP addresses 192.168.1.1 and 192.168.1.2, and two named instances SQL1 and SQL2, all on a single server. I want to bind the IP addresses to the instances respectively so that connections to 192.168.1.1 go to sql1 and 192.168.1.2 go to sql2, rather than having to connect to 192.168.1.1\sql1 and 192.168.1.2\sql2.
What I am after is this. I have two separate servers, sql1 and sql2 that are on out of date hardware. I want to migrate both servers' IP address and databases into separate instances on a new server without having to update any applications that connect to them.
Any suggestions as to how to accomplish this?
If they are named instances then keep the same instance names but set up DNS CNAME aliases
So oldserver1\sql1 and oldserver2\sql2 still work because the host names oldserverX both resolve to newserver thanks to the magic of DNS.
If the instance names are the same, then you'd have to use client aliases I reckon. Binding SQL Server to a given IP address would be a nightmare because no instance name implies port 1433 for both. Or 2x virtual boxes...
Related
We are optimizing our Web System and I then had a thought.
In the web system's Web.config, should the connection string include an IP Address to the local SQL Server or rather an Instance? Will there be a performance difference?
I was thinking that with an IP address a formal IP or TCP connection would be established and perhaps with a local Instance reference a different protocol is executed?
I couldn't find related information on the web.
Using an instance name such as SomeMachine\SomeInstance means the client needs to look up the port using SQL Browser.
For best performance it would probably be best to use an IP address and port number. You must set a static port for the instance, otherwise it won't connect.
Ideally use a DNS name rather than an IP address, otherwise you keep having to change it. So you want something like SomeMachineDnsName.YourDomain.com,1433.
I want to check if a server name like ".\INSTANCE" points to a local sql server instance. Currently I check the first part for certain strings, which are:
.
::1
[::1]
localhost
127.0.0.1
(local)
the computer name
additionally I could check for all installed network adapters IPv4 and IPv6 addresses
Since I didn't find this list anywhere and I see no clear scheme (e.g. (localhost) and local do not work) I'm not sure if there are any other possibilities. So the question is: Is this list complete or what am I missing?
I don't know ip address and host name of a system on internet.I only know database name, how do i connect with that database using internet and without using any third part tool.
Basically... you can't.
Every Database-Server can provide databases with any name, so you can have Database foo on server x and at the same time on server y with different data.
So without any additional info you can't get the adress of the server.
Edit:
Q: Actually server does not have static IP it generates dynamic IP.
A: You can use a DDNS prvider, to create a hostname, which changes automatically the IP adress depending on your current server IP, but without a 3rd party app it seems difficult.
I am unable to get the DNS Server IP address using C. I have tried using IP_ADAPTER_INFO however it only gets the Primary and Secondary WINS Server IP address using pAdapter->PrimaryWinsServer and pAdapter->SecondaryWinsServer.
And based on my knowledge the WINS server and the DNS server are two different types of servers.
Use GetAdaptersAddresses(), and see the IP_ADAPTER_ADDRESS structure.
I am trying to understand the differences between the following 2 connectionstrings.
one uses servername\instancename and the other one uses the server ip address.
Can I specify port number for "serverName\instanceName".
I know you can specify port number for ip address, something like '10.0.0.1,xxx'.
thanks,
Server=myServerName\theInstanceName;Database=myDataBase;Trusted_Connection=True;
Server=myServerAddress;Database=myDataBase;Trusted_Connection=True;
Quite briefly:
if you have just server=(machinename) or server=(ipaddress) then you're connecting to the default instance of SQL Server on that machine (no name for the instance)
if you have server=(machinename)\InstanceName, then you're connecting to a named instance of SQL Server on that machine
Each physical server machine can have one default instance of SQL Server, and any number of named instances (names must be different, obviously).
To connect to a named instance and specify a non-standard port, use this syntax here:
server=(machinename)\InstanceName,xxxx
or
server=(ip-address)\InstanceName,xxxx
where the xxxx stands for the port you want to use.
Mostly, its unimportant if you don't have duplicate instances.
For example, SQL supports multiple instances on the same box as a way of isolating running instances. Most of the time, you will never do this, and thus can get away with using the IP address in the connection string. If for some reason, you need to run multiple instances of SQL server on the same machine, you need to specify which instance you actually want to connect to.
This covers it in more detail.