Replication With 3 Servers
Jan 26, 2001
Hi:
We have a project that will consist of 3 production servers in 3 different
regions and each server has it`s own clients in that region. We want to use
replication to keep them all in synch so that if one goes down, the client
PC`s would just re-connect to one of the other two remaining servers and
keep working.
1. I am wondering what type of replication to use?
2. I was leaning towards merge, but was wondering how to use it to keep 3
servers in synch? If I use the Central publisher with updating subscribers
scenario, I foresee a potential problem as follows:
A. Server1 is central publisher
B. Server2 and Server3 are updating subscribers
C. Server2 (or Server3) goes down, clients reconnect to Server1 and
keep working.
D. When Server2 (or Server3) is back up, Server1 will push all
changes back to Server2.
but,
E. Server1 goes down, clients reconnect to either Server2 or
Server3 and keep working.
F. Since Server1 is down, changes made to Server2 not replicated
back to Server3 (The central publisher is gone) until Server1 comes back up.
G. Server2 goes down while Server1 is down, clients re-connect to
Server3.
H. The changes made to Server2 were not replicated to Server3
because the central publisher is missing.
I. Server3 therefore is missing data changes.
Please help me figure this out. I feel as if I am missing something that I
could do to also keep Server2 and Server3 in synch with each other besides
the Central Publisher.
Thanks in advance!
Jay Natarajan
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Mar 2, 2000
We recently installed another SQL Server so we could test performance of replication between
the two servers. After I set up the replication between the two I got the following error:
subscriber must be running in Per Seat (Named User) licensing mode to use this replication feature.
Is there any way around this? Or could you direct me to some documention pertaining to
this error?
Thank you
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Jul 12, 2000
suppose i am repliacting(Transactional Replication) to two servers using the same publications can i stop replicating to one server without disturbing the other server?
If i resume the replication to the server after two days what will happen to the two day's data?will they be replicated when i resume the replication?
Thank you
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Jun 9, 2000
Can some one please give me a quick,brief description on the "Major diffrences" between these to features? Thank You, JJ
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Jan 14, 2000
Server_1 contains DB_A and DB_B. Server_2 contains DB_A and DB_B.
Can replication be setup where Server_1 DB_A (publisher) publishes to Server_2
DB_A (subscriber) and Server_2 DB_B (publisher) publishes to Server_1 DB_B (subscriber)? The environment is NT 4 (sp3) and SQL 6.5 (sp5a). Thanks in advance.
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Aug 23, 1999
Hi
I have two SQL Servers (6.5). One based in London (LDNINNTS9) and one in New York (NYINNTS2).
I had bidirectional replication set up on one table in a DB and everything is (WAS!!!) working fine. Came to work this morning (Monday typical!) and the following has happened.
When I select the remote servers option on the NY server from Enterprise manager I get the following error message
Unable to connect to site '0'because '' is not defined as a remote server.
Now it says that '' is not defined as a remote server. So I did a select of @@Servername and it has returned (null). It was set to NYINNTS2. I have tried executing some ISQL to change the name and started and stopped the SQL Services but the name remains (null). Does anyone have an idea of what I can do to set the name up as it was?
I know that the Server name gets set to null if it is invalid, but I am trying to set it to NYINNTS2, which should not be invalid? Does the domain name impact the validity of the name?
HELP!!!!
Regards
Steve Farmer
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May 29, 2001
Hi All,
Just want to know if we can replicate data (Transactional Replication) from a clustered servers (server A and Server B are active-passive clustered running SqlServer 7) to another server C running SqlServer 7.
If yes, how to go about doing this. Any white papers, KB articles or books out there which will walk through the steps to do it.
Appriciate any help.
Thanks,
Sri
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Feb 3, 2006
Anyone know what or how to calculate how much bandwidth I may use during replication. I have done this with large pipes with out a problem, just concerned I may need to change the interval to something else.
Thanks
JJ
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May 8, 2006
Hello, Heros of The Programming World!
How it is possible to perform "replication" between two databases using technological means of MS SQL Server 2005 if two servers do not have a connection at all. The only thing is possible - is transfer of data for the replication on a CD.
What is the best way to do it if central database has a hundreds of such "subscribers"?
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Mar 23, 2004
Hi There Gurus - Another Replication question for you all:
Can anyone point me in the right direction to get info on using Linked Servers in Snapshot Replication?
We have Replication all scripted & working between Registered servers, but one of our divisions is not allowing us to register their box on the Parent - ONLY a Linked server.
Thanks in Advance Everyone...
RobbieD
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Apr 13, 2007
Hi! need your help.
I have 2 dedicated sql servers xx.xx.x.155 and xx.xx.x.165 (Hosted Environment)
Both SQL Server 2005.
I need to replicate (snapshot daily) data from 155 (Apollo1) to 165 (Apollo2).
and I have many questions as this is the 1st time that I work on this environment.
I created 3 windows accounts and was able to create the publications (Apollo1).
Apollo1ReplSnapAgent
Apollo1ReplDistAgent
Apollo1PublisherUser
However (the distributor) is not visible to Apollo2 so I am unable to subscribe.
Do you have any idea what I need to do to make it visible?
I setup an ftp site to drop the publication (as I was unable to create an UNC Share) and I was hoping to be able to subscribe to it.
Probably it is a matter of permissions...maybe a firewall? should I ask my provider to open a port? do I need to create the same 3 accounts in the Subscriber?
something like Apollo2SubscriberUser?
Please help!
I am lost!
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Oct 3, 2001
Hi,
I tried with success to replicate a table_test_repl from my local server to an other server.
I used only one table for testing.
After that, i can't drop the 2 tables a_test_repl (on my local server and the other : I've got a message 'cannot drop the table because it is published for replication'
What can I do? I need absolutely to drop these tables to keep a clean model
and I can't drop the database and try again.
Thanks to your answers
Axel
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Jun 22, 2006
Hello,Being a bit of a SQL Server novice, need some advice with the followingsituation.Server A and Server B have SQLServer 2000 based databases. The vendorof the application/system has implemented their own replication processto ensure the 2 databases are in sync. However, there is no clusteringwith virtual IP addresses implemented. So to an external client/db, itis 2 identical databases with the same name on 2 distinct servers.We need to develop an application that will reside on a networkedserver C and with SQLServer 2000 as well. While most of the tables inthis database are self contained, around 10 tables will have to bemirror copies of the same tables from either Server A or Server B.Question, how do we implement subscription based replication on top ofa redundant database, when no clustering is implemented? So, inessence, when Server A is alive, the database on Server C willperiodically (or on change) replicate the 10 tables from Server A. WhenServer A is not alive, it needs to do same from server B. (When bothserver A and B are alive, it is acceptable to get data from either,since they are synchronized internally).Any alternate suggestions on achieving this functionality are welcometoo. If SQL Server 2005 has some capabilities that may address thisproblem, that is a consideration as well.Thanks
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Aug 9, 2007
I am having trouble finding any documentation on how linked servers are set-up under SQL 2005 for log-shipping and replication. Under SQL 2000, the only linked servers "visible" were ones that were user-defined. Under SQL 2005, it seems when you set-up log-shipping or replication, you get these new linked servers which are automatically defined. I would like to understand them and in particular, how security is maintained. We recently had a production issue where after some problem with a server which resulted in having to restart SQL Server, and shrink msdb, log-shipping started to fail authentication when trying to run alert jobs. Only after rebooting the server, and also the log-ship target server, and waiting 9 hours, did the authentication correct itself. I would like to know how it resolved itself and what took so long?
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Sep 15, 2006
The setup: Two sql server 2005 SP1 clusters replicating with about 25 transactional publications and 10 merge publications. (Both clusters are being tested, nothing is in publication)
Currently, the servers are in the same building, which is prone to power outages. When a power outage occurs, how are the publications going to act once power is restored? Will we have to reinitialize the publications? This would be bad considering one of our publications takes around four hours to deliver a complete snapshot. What happens if one of the clusters where to go offline? When it comes back would it continue to replicate, or would the publication need to be reinitialized? Curious if anyone has any experience with this.
I've tried searching for any articles on this topic and have not been successful. If anyone knows of any, point me in that direction. Thanks!
-mike
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Jul 20, 2005
Hi, guys.A very simple question for all of you: how can I get the amount ofbytes exchanged during a Merge replication between two Microsoft SQL2000 servers?Thank you.Bye,Angelo.-
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Apr 19, 2007
Hello,
We have an environment with 7 servers that are running replication with one another and I'm wondering if there are any tools or experiences that any of you might have that may assist in the auditing of these servers. The data should be in synch accross the boards for all tables, but sometimes problems can arise such as replication not being set up properly, stored procedure's being out of synch, or data gliches etc.
In dealing with these issues we have an in-house written program which analises each table on each server and takes a snapshot and does column by column compare. We also have another program that will synch the data up (basically a delete/insert statement on the publisher). This process can take up to 3 weeks for our quarterly update of every table. I'm wondering if anybody has used any tools such as in SSIS or a third party tool and has done or is doing something similar to what we are doing now. If so, are there any tips you wouldn't mind sharing on how our process might be sped up?
Thanks,
Phil
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Jul 29, 2015
I have multiple web databases for storefront orders as linked servers on SQL Server 2008 R2. I need to organize the data for these orders into a structure that can be imported into my ERP application db frequently either on demand or periodically during the day. We are essentially trying to make the manual order entry process automated. My thought was to get the data into views that resemble the schema of the order table in my application db and then schedule a stored procedure with sql jobs or a load routine from within the ERP application that would insert data from the view into the order table.
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Nov 21, 2007
I have a report that was designed using SQL Reporting Services that sits on a SQL reporting server. It's nothing too exciting, it is essentially a three page application with legal jumbo on pages 2 and 3 and applicant data in fields on page 1.
We use rectangles to force page breaks to page 2 and to page 3.
When running the report on the report server, it shows and prints fine.
When running the report from the QA website internally, it shows and prints just fine.
When running the report from the production website from a machine internally, it shows and prints just fine.
When running the report from outside of the company network, the report is jacked. It obliterates large chunks of text, crams text together, and creates blank pages.
I need help in determining where I even begin with trouble shooting this!
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Aug 21, 2001
can anyone tell me if they know of a way to automate the update process from development servers to live server, with little interference from an administrator
I have a development team that are constantly updating their databases along with their ASP code, and want to publish changes an a weekly basis. They have asked me for a way to take their new structures, tables, procedures etc, and copy them to the live servers, but NOT to interfere with existing customer data.
Funny I know – and I hate the idea btw :(
Any references, contacts, 3rd party tool recommendations welcome,
Thanx,
Darren
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Sep 27, 2007
I am in the middle of a major migraton project, moving from x86 SQL 2000 to IA64 SQL 2005. I have a business need to link to several legacy servers. I have a number of problems I am trying to solve.
1) Linking a Kerberos server to a non-Kerberos server.
2) Linking x64 or IA64 servers to x86 servers.
3) Linking SQL 2005 to SQL 2000.
Two of the errors I am encountering are:
------------------------------
TCP Provider: An existing connection was forcibly closed by the remote host.
Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
OLE DB provider "SQLNCLI" for linked server "SCDC250DB" returned message "Communication link failure".
(Microsoft SQL Server, Error: 10054)
------------------------------
And
------------------------------
The OLE DB provider "SQLNCLI" for the linked server "SCDC250DB" reported an error. Authentication failed.
Cannot initialize the data source object of OLE DB provider "SQLNCLI" for linked server "SCDC250DB".
OLE DB provider "SQLCLI" for linked server "SCDC250DB" returned message "Invalid authorization specification".
(Microsoft SQL Server, Error: 7399)
If someone has worked through these problems before, I would appreciate it if you could direct me to the relevant documentation to resolve these issues.
Thanks!
Brandon Forest
Database Administrator
Data & Web Services Team
Sutter Connect Information Technologyforesb@sutterhealth.org
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Jun 15, 2007
I'm getting this, after upgrading from 2000 to 2005.Replication-Replication Distribution Subsystem: agent (null) failed.The subscription to publication '(null)' has expired or does notexist.The only suggestions I've seen are to dump all subscriptions. Sincewe have several dozen publications to several servers, is there adecent way to script it all out, if that's the only suggestion?Thanks in advance.
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Sep 13, 2007
Hi,I have transactional replication set up on on of our MS SQL 2000 (SP4)Std Edition database serverBecause of an unfortunate scenario, I had to restore one of thepublication databases. I scripted the replication module and droppedthe publication first. Then did a full restore.When I try to set up the replication thru the script, it created thepublication with the following error messageServer: Msg 2714, Level 16, State 5, Procedure SYNC_FCR ToGPRPTS_GL00100, Line 1There is already an object named 'SYNC_FCR To GPRPTS_GL00100' in thedatabase.It seems the previous replication has set up these system viewsSYNC_FCR To GPRPTS_GL00100. And I have tried dropping the replicationmodule again to see if it drops the views but it didn't.The replication fails with some wired error & complains about thisviews when I try to run the synch..I even tried running the sp_removedbreplication to drop thereplication module, but the views do not seem to disappear.My question is how do I remove these system views or how do I make thereplication work without using these views or create new views.. Whyis this creating those system views in the first place?I would appreciate if anyone can help me fix this issue. Please feelfree to let me know if any additional information or scripts needed.Thanks in advance..Regards,Aravin Rajendra.
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Jan 17, 2002
Hi,
In my production box is running on SQL7.0 with Merge replication and i want add one more table and i want add one more column existing replication table. Any body guide me how to add .This is very urgent
Regards
Don
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Aug 22, 2007
Hello,
I have this problem on a Production database.
DBCC OPENTRAN shows "REPLICATION" on a server that is not configured for replication. The transaction log is almost as large as the database (40GB) with a Simple recovery model. I would like to find out how the log can be truncated in such a situation.
Thank you.
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Mar 6, 2007
Hello,I'm getting the following error message when I try add a row using aStored Procedure."The identity range managed by replication is full and must be updatedby a replication agent".I read up on the subject and have tried the following solutionsaccording to MSDN without any luck.(http://support.Microsoft.com/kb/304706 )sp_adjustpublisheridentityrange (http://msdn2.microsoft.com/en-us/library/aa239401(SQL.80).aspx ) has no effectFor Testing:I've reloaded everything from scratch, created the pulications from byrunning the sql scripts generated,created replication snapshots andstarted the agents.I've checked the current Identity values in the Agent Table:DBCC CHECKIDENT ('Agent', NORESEED)Checking identity information: current identity value '18606', currentcolumn value '18606'.I check the Table to make sure there will be no conflicts with theprimary key:SELECT AgentID FROM Agent ORDER BY AgentID DESC18603 is the largest AgentID in the table.Using the Table Article Properties in the Publications PropertiesDialog, I can see values of:Range Size at Publisher: 100,000Range Size at Subscribers: 100New range @ percentage: 80In my mind this means that the Publisher will assign a new range whenthe Current Indentity value goes over 80,000?The Identity range for this table cannot be exhausted! I'm not surewhat to try next.Please! any insight will be of great help!Regards,Bm
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May 26, 2015
What is the main difference between snapshot and transactional and merge replication?
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Jul 28, 2006
Hi,
I have a VB.net app that access a SQL Express database. I have transactional repliaction set up on a SQL 2000 database (the publisher) and a pull subscription from the VB.net app. I use RMO in the VB app to connect to the publisher. My problem is I am getting some strange behaviour as follows
- if I run the app and invoke the pull subscription it works fine. If I then close my app and go back in, I can access my data without any problem
- If I run the app and try to access data in my SQL Express database it works fine. I can then close the app, reopen it and run the pull subscription it works fine
however.......
- if I run the app, invoke the pull subscription (which runs fine), and then try to access data in my local SQL Express database without firstly closing and reopening the app, I get a login error
- if I run the app, try to access data in my local SQL Express database (which works fine), and then try to run the pull subscription I get a "the process cannot acces the file as it is being used by another process" error. In this case I need to restart the SQL Express service to be able to run replication again.
I get exactly the same behaviour when I use the Windows Sync tool (with my app open at the same time) instead of my RMO code to replicate the data.
I am using standard ADO.Net 2 code to access my SQL Express data in the app and closing all connections etc
Any advice appreciated !
Thanks
Ronan
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Jun 28, 2007
Hi all,
I have recently setup a transactional replication in MS SQL 2000. After setting up the replication the clients TempDB grew by almost 60GB. Now the client is Blaming me for the TempDB GROWTH and saying that its because of the replication being setup i tried to convince them but they are not satisfied yet. Can anybody please tell me does replication cause the tempdb to grow. If yes then how. can u suggest any good link for getting to know the internal working of SQL Server replication????
Thanks in advance
Jacx
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Aug 30, 2007
Hi all,
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 using SQLSERVER 2005 (SP1).
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Sep 2, 2015
I have been researching on the proper steps or sequence to follow to completely remove SQL Server 2012 Transactional Replication. Â I have read articles about using SSMS as well as using replication stored procedures and some procedures use SQLCMD or just regular TSQL executed in SSMS. Â I have also read articles where people said all you really need is connect to the Publisher instance, find the publication you want to remove and choose "Delete" and everything will be taken care of behind the scene. I have three SQL servers that participate in transactional replication. Â SQL-P (publisher),Â
SQL-D (distributor) and SQL-S (subscriber). Â Do I need to connect to the distributor instance and the subscriber instance when removing transactional replication or is it just really connecting to the publisher and click delete on the publication? I want everything gone including any metadata, systems tables, distributions db and any other replication objects created during the initial configuration.
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Apr 17, 2007
Hello everyone,I am involved in a scenario where there is a huge (SQL Server 2005)production database containing tables that are updated multiple timesper second. End-user reports need to be generated against the data inthis database, and so the powers-that-be came to the conclusion that areporting database is necessary in order to offload report processingfrom production; of course, this means that data will have to bereplicated to the reporting database. However, we do not need all ofthe data in the production database, and perhaps a filtering criteriacan be established where only certain rows are replicated over to thereporting database as they're inserted (and possibly updated/deleted).The current though process is that the programmers designing thequeries/reports will know exactly what data they need from productionand be able to modify the replication criteria as needed. For example,programmer A might write a report where the data he needs can beexpressed in a simple replication criteria for table T where column X= "WOOD" and column Y = "MAHOGANY". Programmer B might come along amonth later and write a report whose relies on the same table T wherecolumn X = "METAL" and column Z in (12, 24, 36). Programmer B willhave to modify Programmer A's replication criteria in such a way as toaccomodate both reports, in this case something like "Copy rows fromtable T where (col X = "WOOD" and col Y = "MAHOGANY") or (col X ="METAL" and col Z in (12, 24, 36))". The example I gave is reallytrivial of course but is sufficient to give you an idea of what thecurrent thought-process is.I assume that this is a requirement that many of you may haveencountered in the past and I am wondering what solutions you wereable to come up with. Personally, I believe that the above method isprone to error (in this case the use of triggers to specifyreplication criteria) and I'd much rather use replication services tocopy tables in their entirety. However, this does not seem to be anoption in my case due to the sheer size of certain tables. Is thereanything out there that performs replication based on complexprogrammer defined criteria? Are triggers a viable alternative? Anyalternative out-of-the-box solutions?Any feedback would be appreciated.Regards!Anthony
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Oct 9, 2007
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??
thanks...
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