Change The Schema Of A Mirrored Database

Aug 8, 2007



Simple question, I hope. I need to add a column to a table of a database that is mirrored. How do I have to do that? Do I need to stop mirroring? Is it sufficient to simply pause mirroring? If I make the change on the principal db, what do I need to do the make the same change on the mirror?

Thanks,

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How To Change Initial Log File Size On Mirrored Database

Oct 23, 2015

I have a database I need to copy from a Prod server to a Dev server. There is not enough space on the Dev server. In looking at the size of the files on the Prod server, the Initial Size property for the transaction log on the Prod server is set to 100,000 MB though the log is using nowhere near that.

This is a mirrored database so the recovery model is "full". I know that to change the initial log size, I have to put the database in 'simple" recovery model. Is this possible? Can I just:

1. Pause the mirror
2. Switch recovery model to simple
3. Change the initial size property to something smaller.
4. Shrink the transaction log
5. Change the recovery model back to full and resume the mirror?

I honestly don't know if the transaction log is needed on the Dev server. Meaning I may just be able to restore the transaction log to a different location on the server and delete it so that  new one is created.

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Something Wrong With Table Structure Change On Mirrored Database

Mar 6, 2008

I have set up mirroring in high availability mode (principal, mirror, and witness).

After setting up mirroring, I needed to adjust the size of a column in one of my tables. I did so with the following command

ALTER TABLE OrderOptimizer.dbo.rCodes ALTER COLUMN CodeDescription VARCHAR(8000).

The column was initially VARCHAR(128)

When I look at the table structure it shows that the column is now VARCHAR(8000), however I can only enter 128 characters into the field.

I forced a failover to look at the table on the mirrored version. It too showed that the column was VARCHAR(8000).

If I open the table I can enter more than 128 characters into the field, however when I refresh, it is truncated to 128 characters,

Any help would be appreciated

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May 23, 2008

Hi all.  I'm mapping FKs in a DataWarehouse and I'm wondering if there is a way to change the schema of a database diagram from dbo.
Thanks,
Charlie

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Sep 4, 2007

We have a Prinicipal, a Mirror and a Witness server. We have automatic failover configured between the Prinicipal and Mirrored server. When we stop MMSQL service on Prinicipal, not all the databases failover to the Mirrored instance.
Any suggestions would be welcomed as we have a tight deadline to get this in Production.

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Sep 27, 2007

Locally I develop in SQL server 2005 enterprise. Recently I recreated my db on the server of my hosting company (in sql server 2005 express).I basically recreated the tables and copied the data in it.I now receive the following error when I hit the DB:The 'System.Web.Security.SqlMembershipProvider' requires a
database schema compatible with schema version '1'.  However, the
current database schema is not compatible with this version.  You may
need to either install a compatible schema with aspnet_regsql.exe
(available in the framework installation directory), or upgrade the
provider to a newer version.I heard something about running aspnet_regsql.exe, but I dont have that access to the DB. Also I dont know if this command does anything more than creating the membership tables and filling it with some default data...Any other solutions/thought on what this can be?Thanks!

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Oct 11, 2006

I'm having a problem with SQL2005 Database mirroring.

I have an ASP application that loops for a certain amount of interations and in each iteration I create a SQL Connection object and use the failover partner in the connection string. The object then writes a simple record and then the connection is closed and the process starts again.

About half way through my loop I force a failover to the server mentioned as the failover partner in the connection string. At this point my application encounters a SQL Exception error and the application fails.

I read in this article, http://msdn2.microsoft.com/en-us/library/ms366199.aspx, that this is expected and that you shoud request a new connection using the same connection string but this isn't working for me and unfortunately no examples are given anywhere.

I would appreciate any help. Thanks

Luis Bonilla

Here is a sample of my code:

Dim k As Integer = 1
Dim constring As String = "Server=SVR01.XXX.XXX.comInstanceName;Failover Partner=SVR02.XXX.XXX.comInstanceName;" _
& "Database=test;" _
& "Integrated Security=SSPI;"

Do Until k = 60
Using con As New SqlConnection(constring)

Dim cmd As New SqlCommand()

Try
con.Open() '<--------This is where the exception occurs
Catch ex As SqlException
Dim en As String = ex.ErrorCode
Dim em As String = ex.Message
Dim emm As String = ex.Number
Dim enn As Integer = ex.State
End Try

lblprimary.Text = "Current Primary Database = " & con.DataSource

cmd.Connection = con
cmd.CommandText = "INSERT INTO SystemsTest (FirstName, LastName)VALUES ('SQLWriter" & CStr(k) & "','" & con.DataSource & "')"

Try
cmd.ExecuteNonQuery()
Catch
lblresult.Text = "Results = Error with record number " & CStr(k)
End Try

con.Close()
cont:
End Using
Sleep(1000) 'For testing
k = k + 1 'For testing
Loop

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Recovering Mirrored Database From Snahshot

Feb 28, 2008



I have a mirred database and have snapshot created from the mirroed database. I can do data selecting from the snapshot. But when the pricipal server is down , I can re-active the mirroed database.( I did succesfully upto this). Then I need to restore the database from snapshot and which failing with following error message.




Code Snippet
Msg 5123, Level 16, State 1, Line 3
CREATE FILE encountered operating system error 3(error not found) while attempting to open or create the physical file 'E:sql_datadevitst_mirrorlog st_mirror_log.ldf'.
Msg 5024, Level 16, State 2, Line 3
No entry found for the primary log file in sysfiles1. Could not rebuild the log.
Msg 5028, Level 16, State 2, Line 3
The system could not activate enough of the database to rebuild the log.
Msg 3013, Level 16, State 1, Line 3
RESTORE DATABASE is terminating abnormally.

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Apr 27, 2001

Hello,

I need to know if the anyone has had success using any sort of tracking tool to manage schema in SQL 7. I'm responsible for several SQL servers, each with upwards of 10 databases - most still in deelopment phase. We use Erwin to store our models and Visual sourcesafe for stored procs and sql scripts.
But now as a Dba I'm looking either:

(1) create a custom database to keep track of schema changes (as they movefrom development to test to prod). OR

(2) buy a 3rd party tools to keep track of schema changes? Platinum?

It's getting too much for a single Dba to manage a busy devel shop with 20 db's. Schema is comming in too often. Only some of our db's are in Erwin.

thanks,

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Dec 9, 2013

I have created a table on SQL Server from SAS. The table gets created fine. However, the table schema has my user ID in it (AD-ENTmyuserid.Table1). How can I change the schema to dbo.(dbo.Table1)? It's fine if I have to make this change in SQL Server Management Studio.

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ADO Connection String Error For Mirrored Database

Jul 9, 2007

I am trying to connect to a failover partner using ADO (non .Net) and Visual C++. ADO is throwing the following exception:

Caught: Unspecified error - Invalid connection string attribute(Microsoft OLE DB Provider for SQL Server)

Connection String:
Provider=SQLOLEDB.1;Data Source=EdwardsvilleSQLSERVER;Failover Partner=Mirror2SQLSERVER;Initial Catalog=SomeCatalog;User Id=SomeId;Password=SomePassword

Any ideas?

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Backup Plan For A SQL2005 Mirrored Database.

Sep 7, 2007

Heya all,

Sorry if this has been posted elsewhere, etc., please point me in the right direction if it has 'cos I couldn't find it!

Right, we have a mirrored database with full safety and a witness for automatic fail over, all works fine, very impressed with it. Now I need to backup the database involved and this is where I could do with some help and answers and/or tips.

As the mirror database is off-line/recovering it seems you can't back that one up, but I'd like to have something that tries to back it up for if/when it fails over and becomes the primary. The solution I've used for now is to write a small .Net application that uses the client side fail over connection string (Data Source=Server1;Failover Partner=Server2) so that it connects to whatever system is currently the primary, and then issues the relevant 'BACKUP xxx' statements to backup the database.

This applications is launched from a windows scheduled task job on the hour (or near to it), every hour. At 06:00 it does a full backup, at 12:00, 18:00 and 00:00 it does a differential backup, and all other times it does a transaction log backup.

This all seems to work fine so far, and generates all the relevant backup files to a share on another server.

So, my main question is; does this look like a good plan? Am I missing some really simple wizard or button that would backup the relevant database from whatever server is up?

Secondly, are the backups from each server interchangeable as they're in a mirrored configuration? That is, for example, the backup application (on the hour) connects to Server1 does a full back up, followed later by a log backup. Server1 then dies, so the next time the backup application runs it connects to Server2 and because of the current time does a log backup from Server2. If we had to restore from backups, could we use the full backup and log from Server1, followed by the log from Server2? Otherwise I'll guess I'll need to modify the logic for the backup application to detect it's failed over, and maybe do a full backup on Server2, or something like that.

Anyway, thanks for any help/advice/tips,

Gareth/OhGod

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Hi all,

I am struggling with configuring SSB network routes to a mirror database. What I want to accomplish is to configure a SSB application to work in a database mirroring setup but I am not looking for a load balancing solution.

According to SQL Server 2005 Books Online (http://msdn2.microsoft.com/en-us/library/ms166090.aspx) the typical routing configuration for a service hosted by a mirrored database is set by specifying the 'mirror_address' field but leaving the 'broker_instance' field empty (i.e. NULL) in the sys.routes table (see Example 3 in link above). I haven't seen how this is possible because if you specify the MIRROR_ADDRESS parameter in the CREATE/ALTER ROUTE command then you must also specify the BROKER_INSTANCE parameter.

I haven't found a way to set the mirror_address field to a valid value and the broker_instance field as NULL, is this possible? If not I must set the broker_instance as the guid of my broker instance but my understanding is that it should primarily be used for load balancing configuration. My preference would be to not set the BROKER_INSTANCE parameter, is this possible?

Best regards,
Oli

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Hello everybody!I'm using ASP.NET  3.5,  MSSQL 2005I  bought virtual web hosting .On new user registrations i have an error =(The 'System.Web.Security.SqlMembershipProvider' requires a database schema compatible with schema version '1'.  However, the current database schema is not compatible with this version.  You may need to either install a compatible schema with aspnet_regsql.exe (available in the framework installation directory), or upgrade the provider to a newer version. On my virtual machine it work fine but on web hosting i have an error =(What can you propose to me?

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I was thinking about doing the following instead:

taking the db offline
creating a backup
disabling logging
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re-enable logging
put db back online
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Is it possible to turn of the transaction logging for the schema change?
Do you see any problems with the above.
Alternatives?
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Thanks in advance.

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Hello,

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Thanks,



-Agustin

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Hi,
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(Microsoft SQL Server, Error: 15138)"

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Hello Everyone,

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Thanks

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tia.

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One of our databases has at some point in its dark past had the owner of the guest schema changed to be a named user, rather than the default guest user. Correcting this feels like it would be easy enough by running the following...

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but that results in..
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Aug 5, 2015

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Mar 21, 2007


The error message:

An error has occurred during report processing. (rsProcessingAborted)
Query execution failed for data set 'TestID'. (rsErrorExecutingCommand)
For more information about this error navigate to the report server on the local server machine, or enable remote errors

The log file reads:

---> Microsoft.ReportingServices.ReportProcessing.ReportProcessingException: Query execution failed for data set 'TestID'. ---> System.Data.SqlClient.SqlException: SELECT permission denied on object 'TableID', database 'Database', schema 'dbo'.

***Background***

General Users got an error message when trying to access any reports we have created.
All admin have no problems with the reports. Users (Domain Users) are given rights (Browser) to the reports and the Data Sources (Browser) and yet cannot view the reports.

An error has occurred during report processing. (rsProcessingAborted)
Cannot create a connection to data source 'DS2'. (rsErrorOpeningConnection)
For more information about this error navigate to the report server on the local server machine, or enable remote errors


I'll add this from the report logs...

w3wp!processing!1!3/20/2007-11:43:25:: e ERROR: Data source €˜DS2€™: An error has occurred. Details: Microsoft.ReportingServices.ReportProcessing.ReportProcessingException: Cannot create a connection to data source €˜DS2€™. ---> System.Data.SqlClient.SqlException: Cannot open database €œDatabase€? requested by the login. The login failed.
Login failed for user €˜DOMAINUsername€™.

The user has rights via a local group to the report and data source (Browser rights) and the local group has been added as a SQL login.


I gave rights to the databases themselves instead of just to SQL and the error changed (Ah-ha...progress, but why!?!?)

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