Sql Server Synchronization

Jun 6, 2002

hi!
all.

i want to create a web application architechture which having multiple web server.
this all web server having sql server database.
now what i want is to Keep all data in all databases.
means i want to synchronize my all sql servers.
it is also possible ki my one webserver can have multiple clusted database.
hope to hear soon from u people.

Regards
Viky

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Hi,

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Sep 6, 2006

Hello everybody,

There is some strange behaviour i've recently noticed while watching synchronization progress in Replication Monitor on SQL 2005 Server Standard with merge replication configured. The merge process seems to repeat several times.

This is the initial synchronizaion (reinitalization at the subsciber). Client is using Microsoft.SQLServer.Replication objects from .net framework assemblies.

The synchronization starts normally (status is "Running"). The last message of selected session box shows (among other messages): "Beginning evaluating partial replication filters" then "Finished evaluating partial replication filters" and finally "Merge completed after processing xxx changes... etc." after a few seconds. Status changes to "Completed" and then... the merge process starts again!! "Beginning evaluating partial replication filters" etc. And this repeats about 15-20 times.

And so whole process takes about 15 minutes instead about 45 seconds to complete initial synchronization. The number of changes is "Merge completed after processing ..." never change since the first such message.

Is this some bug in web synchronization or some invalid configuration setting? Why does merge process repeat itself so many times??

Please help, thanks in advance.

Kuba

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May 24, 2007

Dear All,

How to do Sql Server Synchronization.

Say:
Server "A" contains "123" database.
Server "B" contains "123" database.

But changes is made on Server A. I want that every changes made on server A "123" database should reflect on Server B "123" database on real time basis.

whether it is done through replication or any other way, i want practical answer so that i can try it out.

Thanks

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Sql Server Synchronization

Feb 12, 2006

I want to realize these steps in .net2005 C# programme:

1) Start Sqlserver2005 publication snapshot agent.

2) View Sqlserver2005 snapshot agent status, if it finished then go on.

3) Start Sqlserver2005 Subscription synchronization agent.

4) View Sqlserver2005 synchronization agent status, if it done then continue.

I tried to find some SP, dll, method or script to realize this funtion, but failed.

I really need help.

A thousand thanks for your patience.

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Jun 23, 2005

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Oct 29, 2002

hi!all

i want to synchronize 2 sql server database resides at diffrent locations.

i want steps to do synchronization with the help of sql server enterprize manager as well from Sql - Dmo and VB.

:confused:

Thanks all in advance.

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Oct 27, 2005

Hi all

I have two SQl Server 2000 in two different location, at one point I wand to Transfer the information in one table (in Sql server 1) to the same table (in SQl server 2) using Stored Procedure.

Can any one through some input on how to write the SP?

Regards

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Sep 10, 2007

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This application/agent will continuously monitor all the modifications done by windows application on client machine and then synchronized data with the central database.

Currently we are looking for unidirectional synchronization i.e. from client to server only.

If you have worked on similar kind of project, it would be great help if you share technology/architecture used in your application.


Thanks & Regards,
Jugal Shah

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Jun 30, 2007

Hi
I am stuck while doing synchronization between SQL Server 2000 and SQL Server CE 2.0.
getting an Error "Header information is either corrupted or missing."

My Specification is follow :
Windows XP with SP2
Visual Studio 2005 Enterprise edition
SQL Server 2000 (SP3a)
SQL Server CE 2.0
Application is Smart Device application (Pocket PC 2003) using C#.
Microsoft ActiveSync 4.5
IIS 5.1

I followed steps as per given in this URL :
http://msdn2.microsoft.com/en-us/library/ms839425.aspx#sql_serverce_replication_net_topic2I performed eeach steps successfully, My code is as per given below.

private void button1_Click(object sender, EventArgs e)
{
getSyncReady();
}

SqlCeReplication loSqlCeReplication;
private void getSyncReady()
{
try
{
String lsDBFile = "Northwind.sdf";
loSqlCeReplication = new SqlCeReplication();
loSqlCeReplication.InternetUrl = "http://192.168.0.5/Northwind/sscesa20.dll";
loSqlCeReplication.Publisher = "C99";
loSqlCeReplication.PublisherSecurityMode = SecurityType.NTAuthentication;
loSqlCeReplication.Publication = "NorthwindProducts";
loSqlCeReplication.PublisherDatabase = "Northwind";
loSqlCeReplication.Subscriber = Dns.GetHostName();
loSqlCeReplication.SubscriberConnectionString = "Data Source=" + lsDBFile;
if (!System.IO.File.Exists(lsDBFile))
{
MessageBox.Show("The application requires synchronization", "Replicator",
MessageBoxButtons.OK, MessageBoxIcon.Asterisk, MessageBoxDefaultButton.Button1);
loSqlCeReplication.AddSubscription(AddOption.CreateDatabase);
}
loSqlCeReplication.Synchronize();
}
catch (Exception foException)
{
throw foException;
}
}



I am not getting whats going wrong.
My Firewall is disable and i have not installed any antivirus softwares (including Norton internet Security....in many forums i got this suggestion but i think its not an issue,even though for solving this issue i performed new installation of Windows XP SP-2 )

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May 8, 2007

Hi there,
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Apr 13, 2007



Hi,



I need to move my database servers from one location to another. The issue is that I have over 200 databases to move and my clients can't afford a downtime. The collective volume of all the databases is over 2.5 TB and growing.



I am thinking to copy these databases in batches over the WAN to the new location and replicate them using Transactional replication till I have all the databases moved and synchronized.



Will it be wise enough to use replication for synchronizing 200 databases or is there a better approach which I can use to move these databases with minimum downtime and compromise on performance of applications.



Note: Migration is from SQL Server 2000 to SQL Server 2005.



Thanks in advance.

Ritesh

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Mar 20, 2007

Hi

I am doing a task for synchronize data between SQL server 2005 and SQL Mobile.

Created a publication in my SQL server 2005

Created a subscription in my device thru coding. The code is below.

SqlCeReplication repl = null;

try

{

repl = new SqlCeReplication();

repl.InternetUrl = @"http://localhost/TestFirst/sqlcesa30.dll";

repl.Publisher = @"zcs6";

repl.PublisherDatabase = @"TestNow72743";

repl.PublisherSecurityMode = SecurityType.DBAuthentication;

repl.PublisherLogin = @"sa";

repl.PublisherPassword = @"Test";

repl.Publication = @"TestFirst";

repl.Subscriber = @"TestNow7274310";

repl.SubscriberConnectionString = @"Data source = 'TestFirst.sdf';";



if (!File.Exists(@"TestFirst.sdf"))

repl.AddSubscription(AddOption.CreateDatabase);

repl.Synchronize();

}

catch (Exception ex)

{

MessageBox.Show(ex.Message);

}

finally

{

repl.Dispose();

}

If I run this code from my device the replication work successfully. Now I am calling synchronize from device.

My question is How can i start synchronization from server side. Is it possible to do that from server side?

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Jul 4, 2007

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Mar 9, 2006

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I can subscribe to the publication successfully on the handheld and it creates the .sdf file just fine.

When I then attempt to synchronize, the process will run for a long time and eventually error out. (The database has a couple large data tables that are used for value lookups)

The error says the connection was broken.

Any suggestions on correcting this?

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Any thoughts, advice or similar experience handling a situation as this would be appreciated.

thanks,

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Apr 17, 2008



Hi,

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Thanks

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Dec 7, 2006

Hello,

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i am using C#..net

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native error 29006

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Dec 21, 2006

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Aug 12, 2007



Hi,
I am developing an application for pocket pc 2003 smart device which utilizes synchronization between SQL CE 2005 and SQL server 2005 by means of REMOTE DATA ACCESS method call PULL( ) and PUSH( ) but currently these are the details of the error Im encountering when PULL( ) method is called:


Error code: -2147467259
Descripion: An error occured on the computer running IIS.Restart the IIS server.

Minor error: 28022
Source: SQL server CE
Currently Im developing this application as a final project and due to some limitations I have setup my pc to act as the SQL server and the IIS server both on the same machine.

Any help will be appreciated, thanks.

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May 6, 2008

Hi! Is there a free tool that would synchronize the database in development with the database in the live server? Thanks!

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Feb 19, 2007

Hello guys!
I went through the bunch of documentation pages about configuring the one for providing web subscriptions.
The most usefull for me were:

Security Architecture for Web Synchronization
How to: Configure an IIS Server for Web Synchronization (SQL Management Studio)
How to: Configure a Subscription to Use Web Synchronization
Topologies for Web Synchronization
Securing the Publisher
Subscribing to Publications
Mssubscription_properties (Transact-SQL)
How to: Configure a Subscription to Use Web Synchronization (Replication Transact-SQL)
sp_addmergepullsubscription (Transact-SQL)
Web Synchronization for Merge Replication
 But I still have questions about it. If you could help me with small notes about subscribing to web based merge publication I would really appreciate that!

I believe, I just need a bit of clarification. The target setting is simple as it is: a client should connect to the our hosting server via HTTPS and update his pull subscription on demand by running .NET application.
 Avoiding the server part, are the following steps correct and enough to accomplish what I need?
1. To create subscription, should I use the script:-- This script uses sqlcmd scripting variables. They are in the form-- $(MyVariable). For information about how to use scripting variables  -- on the command line and in SQL Server Management Studio, see the -- "Executing Replication Scripts" section in the topic-- "Programming Replication Using System Stored Procedures". -- Publication must support anonymous Subscribers.-- Execute this batch at the Subscriber.DECLARE @publication AS sysname;DECLARE @publisher AS sysname;DECLARE @publicationDB AS sysname;DECLARE @websyncurl AS sysname;DECLARE @security_mode AS int;DECLARE @login AS sysname;DECLARE @password AS nvarchar(512);SET @publication = N'AdvWorksSalesOrdersMergeWebSync';SET @publisher = $(PubServer);SET @publicationDB = N'AdventureWorks';SET @websyncurl = 'https://' + $(WebServer) + '/WebSync';SET @security_mode = 0; -- Basic Authentication for IISSET @login = $(Login);SET @password = $(Password); -- At the subscription database, create a pull subscription -- to a merge publication.USE [AdventureWorksReplica]EXEC sp_addmergepullsubscription         @publisher = @publisher,         @publication = @publication,         @publisher_db = @publicationDB,        @subscriber_type = N'anonymous'; -- Add an agent job to synchronize the pull subscription. EXEC sp_addmergepullsubscription_agent         @publisher = @publisher,         @publisher_db = @publicationDB,         @publication = @publication,         @distributor = @publisher,         @job_login = @login,         @job_password = @password,        @use_web_sync = 1,        @internet_security_mode = @security_mode,        @internet_url = @websyncurl,        @internet_login = @login,        @internet_password = @password;GO
 
What is  @job_login parameter here? As I understand, I will not run SQL Agent job as our client uses MS SQL Server  2005 Express. And I do not want to run it as we will provide a client with .NET application for performing synchrinization on demand
Parameter @publisher means full SQL Server instance name? For example, MYMACHINEMSSQLSERVER?
What user will be used to connect to the distributor and to the Publisher? Will it be @internet_login?
Do I need running sp_addmergepullsubscription_agent if I€™m going to use the following .NET application code to synchronize over the Internet?
 
2. To perform synchronization with our hosting servers, should a client use the following code?
            // Define the server, publication, and database names.
            string subscriberName = instanceName;
            string publisherName = instanceName;
            string publicationName = "AdvWorksSalesOrdersMerge";
            string subscriptionDbName = "AdventureWorksReplica";
            string publicationDbName = "AdventureWorks";
            string hostname = "adventure-works\garrett1";
            string webSyncUrl = "https://" + instanceName + "/SalesOrders/replisapi.dll";
 
            // Create a connection to the Subscriber.
            ServerConnection conn = new ServerConnection(subscriberName);
 
            MergePullSubscription subscription;
            MergeSynchronizationAgent agent;
 
            try
            {
                // Connect to the Subscriber.
                conn.Connect();
 
                // Define the pull subscription.
                subscription = new MergePullSubscription();
                subscription.ConnectionContext = conn;
                subscription.DatabaseName = subscriptionDbName;
                subscription.PublisherName = publisherName;
                subscription.PublicationDBName = publicationDbName;
                subscription.PublicationName = publicationName;
 
                // If the pull subscription exists, then start the synchronization.
                if (subscription.LoadProperties())
                {
                    // Get the agent for the subscription.
                    agent = subscription.SynchronizationAgent;
 
                    // Check that we have enough metadata to start the agent.
                    if (agent.PublisherSecurityMode == null)
                    {
                        // Set the required properties that could not be returned
                        // from the MSsubscription_properties table.
                        agent.PublisherSecurityMode = SecurityMode.Integrated;
                        agent.DistributorSecurityMode = SecurityMode.Integrated;
                        agent.HostName = hostname;
 
                        // Set optional Web synchronization properties.
                        agent.UseWebSynchronization = true;
                        agent.InternetUrl = webSyncUrl;
                        agent.InternetSecurityMode = SecurityMode.Standard;
                        agent.InternetLogin = winLogin;
                        agent.InternetPassword = winPassword;
                    }
                    // Enable agent output to the console.
                    agent.OutputVerboseLevel = 1;
                    agent.Output = "";
 
                    // Synchronously start the Merge Agent for the subscription.
                    agent.Synchronize();
                }
                else
                {
                    // Do something here if the pull subscription does not exist.
                    throw new ApplicationException(String.Format(
                        "A subscription to '{0}' does not exist on {1}",
                        publicationName, subscriberName));
                }
            }
            catch (Exception ex)
            {
                // Implement appropriate error handling here.
                throw new ApplicationException("The subscription could not be " +
                    "synchronized. Verify that the subscription has " +
                    "been defined correctly.", ex);
            }
            finally
            {
                conn.Disconnect();
            }
 
What does HostName parameter use for? What is that host? Subscriber€™s machine name instance name? Or Publisher€™s? Or Distributor€™s?
Why parameters PublisherSecurityMode and DistributorSecurityMode have value SecurityMode.Integrated? How it is used in the replication model for web synchronization? As I understood from the documentation, client (Merge Agent) should connect to the Subscriber, get the changes, connect to hosting server via HTTPS and perform transactions through the SQL Server Replication Listener, thus the internet login to the IIS should be used to perform all the operations on hosting server side? The same internet login will be used to get snapshot from UNC share?
If I€™ve chosen to use FTP to provide with snapshots, should I then provide ftp parameters to sp_addmergepullsubscription_agent stored procedure or they will be used automatically by ISAPI filters on hosting server?
Thank you.

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Mar 24, 2006

Hello,

I'm having to build a smart client application that works with an offline sql express database on the client. And works with several types of databases - that may be configured to work as a central server. The list includes the sql server family including 2000, 2005 and express and also IBM DB2.

I have to address some rather complex merge replication scenarios. By Merge I mean the ability to deal with handling and synchronization of bi-directional changes. More specifically changes to data may be made to any database in the system. either local or central.

I'm afraid, I cannot use sql replication in a heterogenous mode for several reasons. Some being - the database is being auto attached on the client, the application is expected to live up to the 'low impact' install ideology and should not need any major configuration etc.....

Are there any recomended approaches/Ideas one may use to acheive replication. Any links/information/ideas will be great.



Thanks,

Avinash





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Sep 25, 2007

First please look at image:





Code Snippet

http://www.patysie.com/screen.png

Can I be 100% sure that script component 3 (orange) will start AFTER script component 1 (yellow) is finished?

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Hi!

I'm developing a Windows Mobile solution (Pocket PC Win 5-6). I have Sql Server CE on the device and I use RDA (Remote Data Access) to pull the tables to the Sql Server CE. I use RdaTrackOption.TrackingOffWithIndexes so I can Alter the table design. Then I use the function SubmitSql to push back my changes. On the server I have a table for example Customers, it has a column called CustomerId with identity(1,1). Let's say the highest Id is 100 and the lowest is 50, when I add a record in the Sql Server CE it gets CustomerId = 1 then next one 2 etc which means identity is working but does not continue after 100. I don't need to use the CustomerId when I push my data back because I have sql syntax taking care of @@IDENTITY when inserting new records. Anyone who knows why it begins on 1 and not 101?

/Magnus

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