How Is The Data Secured Over The Air In Merge Replication ?
Jan 4, 2007
Dear ppl,
I have a question for you. One of our client has asked us how is the data secured over the air during Replication?
I have read that Merge Replication uses TLS (Transport Layer Security) protocol to secure the data over the air. But I was wondering if it is all done automatically ? Or do we need to install certificates like for SSL.
We have a Windows Mobile 5.0 application using SQL Mobile that runs over 50 devices and they all synchronise with a single Publisher SQL Server 2005 using GPRS connection. We haven't got any SSL certificates installed on the server.
Now how can i make use of TLS in my application to secure my data over the air (using TLS)?
thanks 4 ur rpl..well i have a simple doubt if u can guide me it will b gr8 help..well i am developing an application of location based services, in which i am going to store my data on SQLserver 2005 and will fetch the data from it when the user logs in to the user's PDA device so that a user can work offline on the data when there is no connection and when he gets the connection he can synchronize the data with SQLserver 2005. so now i m confuse whether i should use the merge replication or ado.net synchronization framework or RDA?what is the difference between merge replication and synchronization and which is better?
I am designing a mobile application.I am having database in sql server 2005 and i want to synchronize this database with sql server ce database on pda.I am using merge replication method for synchronization.Please give step by step procedure for data synchronization using merge replication between sql server 2005 and sql server ce 2.0,also let me know whether sql server enterprise manager is needed or will it work without it,if needed give me the link from where to download it as it is not available in sql server 2005. Reply soon. Thanks in advance.
We had merge replication setup between 2 tables, Table A and Table B using SQL 2000. This was working 100%. The users asked to disable updated/deletes to both these tables if data existed on 2 other tables. Table AA and Table BB. We implemented it as follows:
1) Created Insert/Update/Delete triggers for Table A & B. It basically check for Table A is there a record in Table AA, if it exists, raise an error and don€™t commit.
2) Removed all foreign constraints from Table AA and BB
3) Added Table AA and BB to the current replication.
Then all hell broke loose, we got conflicts all other the place saying that Table AA cannot be updated because records does not exist in Table X. To our surprise we found triggers generated by Erwin in 1998 €“ that check for €śforeign contsraints€? and removed them immediately.
We continued to get conflicts but could see from the error messages it was generated by the triggers in point 1. We added the NOT FOR REPLICATION clause and everything has been running smoothly or so we thought€¦..
After 2 months we got a call that data is missing. It€™s random data and the only explanation I have is that replication caused that. My biggest reason for saying this is tracking the application audit trail I€™ve found that all the data missing was added during the period we had all the conflicts.
I need a solid explanation for this and can anyone confirm that this is possible?
We have a database that's using merge replication between two servers, and we need to insert a lot (about 1GB) of data into it.
The servers, however, are separated by a 192k WAN connection, so it's impractical to rely on the merge replication to send the data across to the subscriber.
Is there a way to insert the data at both ends? I can get the data out there on a DVD or a laptop easily enough. Can I load the data into both copies of the database and tell the merge agent that it's not to be replicated?
When I reinitialized a subscription from SQL2005 db (publisher) to a SQL 2000 DB (Subscriber) and had the Upload changes before reinitialization turned on, the data from the SQL 2000 db didn't get uploaded. This resulted in a loss of 2 days worth of data.
Does anyone have any idea if there's anywhere that data is kept. (unfortunately a series of errors caused our backups to not be running on the 2000 db either).
I'm having an error with merge replication my suscriber are downloading old data, all this start happen after I install SP4.
let explaint this with more details ,
if a made an update to a row in a table from the publisher , the agent history show that 1 change have downloaded to the suscriber, a put an audit in the suscriber and yes one update was downloaded but the row still the same, look like the suscriber downloaded old data instead of the curent change that i made.
If i delete the row, the rows gets delete at the suscriber, if a insert the row the row get insterted ok.
The problem only happen with rows inserted at the suscriber, that later on get update at the publisher. My suscriber has MSDE 2000 SP3 an my Server has SQL Enterprice 2000 SP4.
We have configured one-way merge replication in our topology. That is data flows from Subscriber to Publisher only. We have a publisher and a subscriber. There are 3 publications in this category and each publication has a subscription. We use SQL Server 2005 SP1 in both the servers. The retention period is the 14 days (default). After this period, I get the following error in the subscription in Replication Monitor. The Error message is
Error messages:
The Merge Agent failed after detecting that retention-based metadata cleanup has deleted metadata at the Publisher for changes not yet sent to the Subscriber. You must reinitialize the subscription (without upload). (Source: MSSQL_REPL, Error number: MSSQL_REPL-2147199402)
I read the post http://forums.microsoft.com/MSDN/ShowPost.aspxPostID=372790&SiteID=1
which said that this error might be solved in the SP2. We have not yet applied SP2, but even after applying SP2, will this error be solved for One Way Merge Replication since the data from publisher will not go to the subscriber always in this type of topology??.
Kindly get back to us regarding this as soon as possible. Thanks in advance.
I 'm trying to set up merge replication between two servers that have the same schema databases. The two database have the majority of there data the same but as well as data inserted at a later time independently on the two servers. (The two servers were connected in a merge replication scheme that failed at some later time and replication was paused, but users continout to insert data indepentedly at the two servers.)
I need to get them up and running.
I cleaned replication at both servers, I recreated the publication at the puplisher distributor and all is fine.
When I create a push subscription to the subscriper I get the error invalid column name 'rowguidcol' .
I so far managed to have merge replication running on two identical databases (schema and data).
Just some thoughts. After some reading I found that it might be related to identities and identity range or indexes. I set the identity seed and increment at 2, 2 at publisher and at 1,2 at subscriper. (On the same tables at puplisher and subscriber.) Is that ok? is that the way to do it?
Digging a bit more Using the SQL Profiler I can locate the error to happen when sp_MSaddmergetriggers executes.
Thanks allot for any help
Version.
Microsoft SQL Server 2000 - 8.00.2039 (Intel X86) May 3 2005 23:18:38 Copyright (c) 1988-2003 Microsoft Corporation Standard Edition on Windows NT 5.0 (Build 2195: Service Pack 4)
I want to transfer data between an sql server 2005 and my pocket pc. So i've installed a sql server CE on it.
I know that i can use the merge replication but, i don't have any IIS. So, i've got to transmit data though email that have got a file attached. I Know how to email from sql server 2005. When the pocket receive that email, i don't know how to insert the data in sql ce from outlook compact. Doi have tu use SSIS , in that case how can i run the package?
I have the merge replication (Push)Â for SQL Server 2008.The right-click option for Start and Stop Synchronizing in subscriptions has been disabled. How can I stop the merge replication and start again ?
This error happened 1 week after I created the merge replication. The merge data cannot sync to subscriber and only solution I can use is drop and re-create the merge replication again but error would be re-occur a week later. The merge replication work fine before and start from middle on May 2015, but it keep happen right now.
1st for displaying data before inserting the value into table 2nd for displaying data after inserting the value into table just see the screeenshot which i have taken
actually the problem is, we are not getting any type of errors even though I have try/catch blocks. I have colored that particular statement in RED color, where it is getting stuck, while executing, if we sit 40-45 minutes then also the execution pointer is not going on next step.
please look into this, and if u have any idea/person by which/whom we can solve this then please tell us.......
-chaukse rahul
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Reflection; using System.Data.SqlServerCe; using System.Data.Common;
namespace ProjectSQLMobile2 { public partial class Form1 : Form { private DataSet dsMemberList;
private void buttonInsertData_Click(object sender, EventArgs e) { //add directly into ce database sample: SqlCeConnection cn = new SqlCeConnection(@"Data Source=""TestLast.sdf"""); string SQL = "INSERT INTO MembershipData(MemberName) VALUES('" + textBox1.Text + "')"; cn.Open(); SqlCeCommand cmd = new SqlCeCommand(SQL, cn); cmd.CommandType = CommandType.Text;
try { /* * This statement is taking too much time to be executed * what should we do??????? */ cmd.ExecuteNonQuery(); } catch (SqlCeException ex) { DisplaySQLCEErrors(ex); } finally { cn.Close(); } Merge(); } } }
please help,
ur help will be appriciates
NOTE:- I am getting output in 1st datagrid, but in 2nd dtagrid there is no output
This is just too simple. I must be doing something wrong. I have tried everything, redoing the SQLMobile merge publication, setting permissions, and need help ASAP.
The basic test with the http://localhost/sqlmobile/sqlcesa30.dll returns the message:
SQL Server Mobile Server Agent 3.0
I have tried the merge replication with both my local SQL Server 2005 installation and a remote development box. Both instances return the same error.
I am able create and replicate a database using the sample application:
I am new to Sql server and had just finished the MErge Replication setup on one of the PRoduction server. Today I got the request to change one of the Datatype of one the Published Article. Please help as what are the correct step to make it happen. Is there any production downtime required and if yes , then how much.
If I want to access or modify my local subscription data(not the configuration) how can I do that(from sql server 2005 or from asp.net)? Also can i update directly to the local subscriptions data or do I need another layer which will update from a table for example??
i have created database in sql server ,"in production there r 20 users for the application" whose database owner is dbo is it correct method. and the user is sa , without any password, how do i secured my database from any unautherise access to my database.
1.should i create a new account for that and disable the sa account or how.
We have a webservice, which we are able to consume in the SSRS report. Due to some requirement, we need to conver this webservice in to the secured webservice using the SSL https extension. We did this and just changed the connection string from http to https.
But when we try to run the report, we get the following error message. Copied from BIDS.
TITLE: Microsoft Report Designer ------------------------------ An error occurred while executing the query. Failed to prepare web request for the specified URL. ------------------------------ ADDITIONAL INFORMATION: Failed to prepare web request for the specified URL. (Microsoft.ReportingServices.DataExtensions) ------------------------------ The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. (System) ------------------------------ The remote certificate is invalid according to the validation procedure. (System) ------------------------------ BUTTONS: OK ------------------------------
I know that adding a column using ALTER TABLE to add a column automatically allows SQLSERVER 2005 to replicate the schema changes to the subscribers, however, I would like to add a new column to an existing article that is being used for merge replication, however, I don't want this column to be replicated. Re-initialising the subscriptions is not a option. Help would be appreciated.
I am working on bringing our disaster recovery site to be a live site. Currently we replicate to one of out servers (server B) with merge replication (from server A). Server A also does one way transactional replication form some table to several other servers including servers at the DR site.
This setup is not going to be fast enough for what we need so I am wondering if a table is receiving merge replication will the merge updates also replicate down the transaction path??
Example... Server B update a row and merges to Server A. With this update them replicate (via transactional) to Server C??
Hi everbody, I setup the Merge Replication , it is working perfectly. But i have one problem now it is updating both ways. I nedd one way. Any body tell me which parameter i have to change.
My production box is running on NT4.0,SP6, SQL Server7.0,SP2. We implemented Merge replication. Working fine last 7 months. Last weekend i disabled replication, Successfully removed Distributor and Publishor. After that try add new fileds but won't allowed me. It's give the error message. I Also found Some Conflict_tables found almost 20 tables. All system Tables. Can delete these these tables, if i delete any problem my database. I added filelds many times but this time i got errors.
I have just installed replication on our production server to Merge Replicate with a Laptop server that will travel from time to time. I have now noticed that we cannot add or change any fields or attributes on the tables which are being replicated (which are all tables in the DB). This is a problem because we are changing and adding columns all of the time. Is there a way around this issue like shutting down the replication service or something? I have been unsuccessful in finding a way around this other than removing replication while we make changes.
I have implemented a Merger replication on our development server and I get a fillowing error when I try to update one of the table in publisher. "Transaction cannot start while in firehose mode"
Hi, I read some where that replication has two types conflict resolution, 1. row based and 2. Column based... If I am right... Can any one point me how to find out this option and how to set it up....
I have a merge replication going between 4 servers. The problem is when ever I do some BCP transfer to one of the tables in one of the servers. It puts the data in that table. But that Data does not get replicated to any other server like it should.
Please Advice on what to do. Is there any option I am forgetting to set or something.
I have successfully tried merge replication on single server with 2 databases. now i want to do the same with different servers, when i create pull subcription on server 2 which user account should I use? it is giving log in failure i tried using windows admin account and also the 'sa' account.
I have posted this earlier and I am re-posting it simplifying what I had said.
The scenario is:
I have two sql server database instances with the same database schema and all. However, both of them have different data. I have not set them for replication at all. Now, I want to do merge replication between them such that the data between them could be syncronized.
When I do pull merge subscription I have two choices - 1.Bringing schema and data to subscriber from publisher
2.Not bringing the schema and data from publisher to subscriber.
Obviously, I chose the second choice. But upon syncronizing I dont see any data from publisher coming to subscriber and vice-versa. If I add new data to publisher and do syncronization, I can see ONLY the new data created after the replication setup in subscriber. If I add new data to subscriber and do syncronization then the new data is removed from subscriber and not propagated to publisher.
I have just set up Merge replication, I have two servers, server A and server B, the merge replication worked successfully but I don't quite sure which databases should or should not replicated? If not, what other methods should I use?
I would really appreciated any comments or advice out there!
I had set up merge replication. I got these error messages where replications starts "Column names in each table must be unique. Column name 'PubID' in table 'bonflict_DBName_PHP_Data_Publications' is specified more than once "
PHP_Data_Publications table defind as:
CREATE TABLE [dbo].[PHP_Data_Publications] ( [PHP_Pub_ID] [uniqueidentifier] NOT NULL , [PHP_Data_ID] [uniqueidentifier] NOT NULL , [PubID] [uniqueidentifier] NOT NULL , [UserID] [uniqueidentifier] NOT NULL , [Username] [varchar] (50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL , [Publication] [nvarchar] (50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL , [Pub_Year] [datetime] NULL , [Pub_Name] [nvarchar] (50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL , [rowguid] uniqueidentifier ROWGUIDCOL NOT NULL ) ON [PRIMARY] GO
ALTER TABLE [dbo].[PHP_Data_Publications] WITH NOCHECK ADD CONSTRAINT [DF__PHP_Data___rowgu__01E91FA0] DEFAULT (newid()) FOR [rowguid] GO
CREATE UNIQUE INDEX [index_1466488303] ON [dbo].[PHP_Data_Publications]([rowguid]) ON [PRIMARY] GO
