@Microsoft: E-Learning Course Database Mirroring
Jul 7, 2006
Hi MS-Guys,
the following E-Learning course has some errors which have to be investigated otherwise the course will be very disappointing for the participants:
Kurs 2938: DatenverfĂĽgbarkeitsfeatures in Microsoft® SQL Server„˘ 2005 (this is only the german subject for the course, the link should apply in english versions as well, as the course is actually in english)
While starting the VLab to setup mirroring, the sqlinstance2 and sqlinstance3 is not started (this sure can be done very easily), another point is that you installed RTM version where database mirroring is disabled by default (sure this can be done by swithcing the trace flag, but the course is not about doing administrative tasks, right ? :-) )
HTH, Jens Suessmeyer.
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http://www.sqlserver2005.de
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May 30, 2006
I recently downloaded Visual Studio 2005 Express along with the Learning Resources for Visual Basic Express video. First let me say that the Learning Resources is an excellent resource for beginners to become familiar with Visual Studio, Database and programming concepts. Although the series is probably too basic for experienced developers you may find it reveals a number of tricks in the Visual Studio 2005 interface.
http://msdn.microsoft.com/vstudio/express/vb/default.aspx
Problem
I downloaded the VB Lesson 9 Visual Basic Project from Microsoft Learning Resources. With out making any changes to the project I compiled and ran it, making changes to the data and saving the changes. Every thing look great until you run it a second time and see that the changes to the data are all lost.
Observations:
1. Changes made to the data from within Visual Studio (Show Table Data) do take effect.
2. The in-memory data (DataSet) is changed as you move from row to row.
3. The TableAdapter.Update call returns 1, ostensibly indicating the number of rows updated.
4. The data in the database is not changed by the TableAdapter.Update call.
Operating System: Windows XP Pro Service Pack 2
Other Software installed on this system
20SQL Server 2005 Express
Visual Web Developer 2005 Express
Visual Studio 6.0 Enterprise
Visual Studio .net Enterprise
Microsoft .NET Framework SDK
Microsoft Office 2003
If anyone can help me understand the cause of this problem I would greatly appreciate it.
Thanks
Bob
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Jul 7, 2007
Hi All,
I have Oracle 9i personal edition on my laptop which I use to learn Oracle/SQL including creating and quering tables. With this I have been able to go into jobs confident with being able to query Enterprise implementations of Oracle in a commercial environment.
Now I would like to learn Microsoft/SQL and I was wondering whether Microsoft's SQL Server 2005 Express will be enough for me to learn MS/SQL like Oracle personal edition has.
Regards,
Seaweed
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Nov 2, 2005
Hi -I'm completely new to Microsoft Query Analyzer and I need to learn itfor work to do data mining as a Product Manager. Does anyone have anyrecommendations on how to learn this and where? Which books? Whatclasses? What links to online tutorials?thanks
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Feb 13, 2006
I'm working towards MCAD and as elective I want to do the SQL Server course. The exam is on SQL Server 2000. I was just wondering whether the online course that Microsoft currently have a available for free at https://www.microsoftelearning.com/sqlserver2005/default.aspx would be useful and applicable to SQL Server 2000, or whether it is sufficiently different product to make it confusing to use this as a learning resource.
Also if anyone can point me toward any webcasts for SQL Server that would be great. I listened to Fritz Onion's 15 part series when I studied for my ASP.NET exam and would like to do something similar for SQL Server 2000 if any are available.
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May 3, 2008
Server A = primary SQL DBs (mirroring origination)
Server B = failover SQL DBs (mirroring destination)
For database mirroring a witness is required.
Can the witness live in another instance of SQL on server B?
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Oct 12, 2015
Using SQL Server 2008, we would like propose mirroring between two servers of a critical database. Since we initiate, may require to clarify on its purpose and also required changes from application end.Any changes required from OS Level? (I believe both servers IP or Host name should be added in host entries. Mirroring ports should be allowed/open including Principal and mirror server IP Addresses): Windows Team.Any changes required from Application? (Instance name, authentication: user name and its password should be added in web config files): Application Team.Any changes required from Network Team?Also for mirroring both the principal and mirror servers should be with same version, does it only mean SQL Server 2008 versions are enough or does it also mean to say build numbers 10.00.4000 should also be same.URL....
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Dec 2, 2014
I have just finished configuring my first test mirrored environment (High safety mode). I setup the database engine service accounts on each of the servers with domainuser. I inherited a production mirrored environment set up by someone else. On the production servers the database engine service account is NT Authorityuser a local account. I am trying to practice installing Windows updates within a mirrored environment and I not sure how to proceed when the service account is NT Authority user account. should I change the service account to a domainuser?
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Aug 30, 2006
In VS 2005, when we choose database connection, we can choose one of the above. My question is in what situations should we choose MS SQL Server Database File (SqlClient), and when should we choose Microsoft SQL Server?
I want to deploy a standalone desktop application with a backend database. Which backend database should I should and which of the above connection should I choose?
Thanks very much for your information.
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Jun 12, 2007
When I issue this command:
ALTER DATABASE foo set PARTNER = 'TCP://10.3.3.1:1234'
I get this error message:
The database is being closed before database mirroring is fully initialized. The ALTER DATABASE command failed.
What does that mean, and how do I fix it?
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Apr 2, 2008
I set up a new mirror server. Everything is good except that the Database Mirroring Monitor is not working for one of the databases. In the monitor the principal data is showing up as blank
If I look at dbm_monitor_data on the principal most of the data columns (e.g. Send_queue_size) are null where as they have data for the other databases.
Both servers are SQL Server 9.0.2047 Enterprise Edition.
Any idea what might be going on here?
Thanks in advance.
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Oct 12, 2007
Hi All,
Does anybody know the OS requirements for Database Mirroring? I checked BOL and Google but couldn't find any info on that.
Thanks.
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Feb 27, 2008
Hi All,
I have read on the web that high protection mode not recommended, except in the event of replacing the existing witness server. But I can't find the reason why anywhere. Can anybody explain? Thanks.
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Mar 12, 2008
Hi All,
Couple of questions about database mirroing.
1. Once the mirroring is setup is it possible to switch between high-protection and high-performance modes? If it is will I have to stop the mirroring, switch the modes and then restart it again?
2. Let's say the principal server went down and I manually failed over to the mirror server. Mirror server runs as a new principal server for a couple of days and then I bring the original principal server back up. What needs to be done in order to bring transactions on the principal server up to date?
Thanks.
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Mar 15, 2007
for a database mirroring , which stretergy is good.
Creating with witness server or without it.?
I am firsttime doing this , so i am posting it to the forum..
and also if we are creating the database mirroring with witness server for automatic failover , will the witness server need the same amount of harddisk space like the pricipal or mirror server.??
thanks
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Jul 30, 2007
we want to migrate our production server , without taking the database down.so what we did was , we mirrored the databases from production to one of our development servers and we took the prodcution server for uprgrade.
so today we are moving back (mirroring) all the databases from that development server to our new production server.
my question is , when i move
productionserver_old(principal server) - having the script for principal server
development server(mirror server---->principalserver)) - having the script for mirror server , which is now acting as principal server
new production server(mirror server) - having the script for mirror server. will become principal server , once i moved all the databases
now while mirroring between the developement server and the new production server, i have to run the scripts for the mirror server only.
so both the servers are havign the mirror script now...
is that a problem, or any other way i can handle this....
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Mar 21, 2008
Hi All,
Does anybody know any good Tutorials for Database Mirroring (Automatic Failover) or Manual Sync with Mirror Server. I tried some sites online, but doesn't have detailed steps..
pls.help as i need to sync data with One of my Mirror using Sql Server 2005.
thanks
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Mar 14, 2008
Hi,
I have some questions about database mirroring. we have almost 40 databases in one server. Can I set up the database mirroring for all the databases. Is it going to any affect on performance. we have already setup the mirroring on almost 30 databases, and I need to set up for the rest of 10. please some body could help on this. Thank you.
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Jul 7, 2006
Hi,
i'm a novice of sql server and I have a problem.
I have to reply a server in which there are database that are managed with sql server 2000 sp3; what I must make in order to set up the mirroring between the database of the two server so that the data are always aligned ?
thanks for the attention
best regards
alessandro
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Apr 18, 2007
I am new user of SQl and preparing the exam database mirroring....can you tell me how i start the mirroirng ..what is my first tep..and is there only one instance
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Mar 12, 2008
Hi All,
Couple of questions about database mirroing.
1. Once the mirroring is setup is it possible to switch between high-protection and high-performance modes? If it is will I have to stop the mirroring, switch the modes and then restart it again?
2. Let's say the principal server went down and I manually failed over to the mirror server. Mirror server runs as a new principal server for a couple of days and then I bring the original principal server back up. What needs to be done in order to bring transactions on the principal server up to date?
Thank you.
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Jan 4, 2008
Can we have database mirroring for two databases. Like i have an application where in the db used are two, namely DB1 and DB2, DB1 is used in the connection string and with the help of DB1 the tables and sps of DB2 are handled.
in this case can i go ahead with database mirroring. Please comment and give the idea or link on the same.
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Oct 25, 2006
Hi,
Is there a way to automatically mirror/backup a SQL Express database with a SQL Server 2005 licenced system?
They will be on seperate machines on the internet.
I have done manual backup and restores but would like to allow constant updates to allow both databases to be synchronized.
I read that the SQL Server 2005 version has a mirroring facility but I also read that this is not possible in the Express version.
What other (automated) options do I have?
Thanks Andrew
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Jan 30, 2002
Hello Everybody ..
Can anyone help me with some information or procedure as to how to mirror database devices in SQL Server 7.0 & SQL 2000 servers ?
SQL Server 6.5 has mirror utility built in the Enterprise manager .
Is there any way to do it on SQL 7.0 and SQL 2000 Servers ?
Any help will be appreciated .
Many thanks
Yatin.
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Mar 23, 2007
what are the different testing we can do for the database mirroring with witness and without witness ??
thanks
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Jan 24, 2008
Can 32-bit witness Server support 64 -bit Principle and Mirror Server? Please experts in database, i need advise.
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Nov 22, 2006
Can anyone offer some advice on how to reduce the size of a databaselog. The database is mirrored on another server using the logs. Thanks
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Jan 28, 2008
Hi Can Anybody help me what exectly is database mirroring? I am working in a small scale company. we have SQL server 2005 installed for a software used by our staff. Can any body expalin me what is mirrroring? how can i implements to my Database? What are the Basic Requirements? What are the Steps? Plz.. Thanks in advace who ever help me out for this......
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Dec 28, 2006
After reading about it, i'm still confused. Is replication and database mirroring the same? they seem to accomplish the same thing.
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Mar 16, 2008
I have setup database mirroring for one big database.But now Transaction log is full and server is down. What should i do? We do bulk-insert in that database.
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Feb 7, 2007
Hi
I have 3 server configured with mirroring. When the automatic failover occur, I use alter event generate by Sql Agent to rebuild user account (problem witch
orphan user). My application use multiple database and I set up mirroring to multiple database. A question is the order which database get up after automatic failover. When event occur all database are ready to use, or maybe one database get up and sql agent send me event , secound database get up and sql agent send me event. What is the order?
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Feb 26, 2008
I'm not personally a DBA or claim to be a database expert, instead I am a software architect who works closely with database architects and DBA's. I'm presently architecting a system where we will have a smart client used in both Europe and the United States from the same database instance.
The system is to be used for performance testing of devices and then the results will be available to management through the same smart client used by test engineers etc. The first release is operational in the United States today with Poland coming online shortly.
Today we are weighing our options between having cross-geo database mirroring or merely having the database server in the United States with application server level caching implemented in Poland and the United States.
The .net framework's Windows Communication Foundation is used with a netTcpBinding and the service layer is asynchronous with the reliableSession option enabled.
Does anyone have any feedback on whether you would go with cross-geo database mirroring or would you use local application servers with possibly some caching capabilities at that layer? Please also describe the benefits and any risks associated with each also...
Thanks in advance,
Doug Holland
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