SQL Server - Transactional Replication Questions
Sep 5, 2005
Our database has grown to the point where our current server is struggeling with the query load. One option is to get a 4 processor machine with 16GB of RAM, but I'm also looking at transactional replication as a solution. Currently we run dual Xeon with 4GB of ram (using the /3GB switch in the OS) We have SQL 2000 Enterprise.
The idea is to setup a secondary server with transactional replication pushed from the main server, so that some SELECT-only queries can be executed on the secondary server - thus taking load of the main one. We should be able to add PKs to the small number of tables that currently don't have them, and we should be able to run all updates / inserts on the main server.I'll setup a push-subscription for the entire DB (maybe excluding some log tables) and then for ceratain stored procedures I'll direct our applications to use the backup instead of the main server.
So: Is this a good idea? Is it easy to backup the server using transactional replication? How much extra overhead will this mean for the main server?
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Dec 1, 2006
Hello,
I'm interested in combining the Peer-to-Peer Transactional Replication and Standard Transactional Replication to provide a scale out solution of SQL Server 2005. The condition is as follows:
We may have 10 SQL Server 2005 (1 Publisher + 9 Subscriber) running transactional replication in the production environment and allow updates in subscribers. To offload the loading of the publisher, we plan to have 2 Publisher (PubNode1 and PubNode2) using Peer-to-Peer Transaction Replication and the rest 8 subscribers will be divided into 2 groups. The subscribers 1-4 (SubNode1, SubNode2, SubNode3, and SubNode4) will be set to be standard transactional replication subscribers of PubNode1, and the rest 4 subscribers (SubNode5, ..., SubNode8) will be set to be standard transactional replication subscribers of PubNode2.
Is it possible to setup above 2 Publisher + 8 Subscriber topology?
Also, could we set the 8 subscribers with updatable subscriptions to achieve each node is updatable?
We do not plan to set all the 10 nodes using Peer-to-Peer Transactional Replication as it is necessary to make sure n*(n-1)/2 (i.e. 45) peer-to-peer connections is reliable. It seems that the maintenance cost is high if the servers are not in a LAN and the topology is very high coupling. So we prefer to divide the 10 nodes into 2 groups and reduce the cost of each node to maintain the connections to all other sites.
That's the scenario.
Any feedback is welcome and appreciated.
Thanks,
Terence
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Aug 29, 2006
we have the standard licensed copy for sql server 2005
while configure transaction replication not allow to move
message is required licesence for replication again i have to get license for
replication
please advice
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Jun 5, 2006
We are attempting to rollout a name and address system to 10,000 users who will use an application connected to an MSDE database.
We are using transactional replication to distribute data updates to them. Clients are connecting via the On-Idle feature of Synchronization Manager to grab transactions.
Server spec:
Network card: 1GB
Processors: 2* Xeon 3.2Ghz
Server spec: DL380 2Gb memory
Concurrent connections set to: 600
Disc: RAID 10 with 6400 controller
We are not using hyper-threading.
So far we have rolled the system out to 3500 subscribers, 500 per day.
Each day a subsciber will receive at least 400 transactions and 5000 commands.
Latency is 6 seconds, delivery rate 180 commands per second at less busy times.
Latency is 14 seconds, delivery rate 127 commands a second at busy times.
I have seen it get as slow as 0.04 commands a seconds at busy times.
The server becomes incredibly slow when there are more than 50 concurrent connections.
We are seeing 100 CPU for most of the day as clients connect to the distributor at various times. Lunchtime is particularly busy when people go to lunch, leaving their machines idle. We see lots of "time-outs" and "unable to connect to distributor" messages on the replication monitor during peak times.
What can we do to improve the performance of the distribution server?
Are we being over-ambitious by selection SQL Replication for this scenario?
Thank you for any help!
Best wishes
Julian
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Jun 15, 2015
How do we know our schema changes will propagate to subscriber without breaking the replication? Is there any t-sql command to find out the option true or false?
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Jun 6, 2007
Hi,
I'd appreciate any help i can get here. I'm working with an MS SQL Server 2005 SP2 db on a Windows 2003 OS. I set up replication from an Oracle 10g instance a few months ago, and everything was working until i installed SP2 for SQL Server.
I get the following error:
2007-06-06 16:06:22.488 Status: 4096, code: 20024, text: 'Initializing'.
2007-06-06 16:06:22.488 The agent is running. Use Replication Monitor to view the details of this agent session.
2007-06-06 16:06:23.082 Status: 0, code: 1008, text: 'ORA-01008: not all variables bound
'.
2007-06-06 16:06:23.082 ORA-01008: not all variables bound
2007-06-06 16:06:23.082 Status: 0, code: 22037, text: 'Heterogeneous Logreader encountered an error in call to LoadReplCmds when processing state 'PROCESSSYNCDONE'.'.
I can get snapshot replication to work just fine, but transactional replication throws up the error above.
Anyone with any ideas on how i can proceed?
Thanks in advance!
Regards,
Rama.
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Mar 19, 2015
Is there a way to force the snapshot to use a format file when bcp'ng the data to the subscriber?
The publisher and subscriber schemas are slightly different. Mainly added columns to the subscriber.
We have a post snapshot script that updates these additional columns on the subscriber.
I'd like to force the snapshot to use a format file, so it doesn't error when initially loading the data to the subscriber.
Is this possible?
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May 17, 2015
We have installed 2014 sql server. We have currently 2008r2. We have to run the real time report. So we need to set up transactional replication b/n those two servers. We need to use 2008r2 as publisher and 2014 as subscriber.
Is it ok to have subscriber higher version than the publisher?
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Jun 15, 2015
Any experience of success or failure setting up CDC on the subscriber end of transactional replication?
Also for a bonus answer, why are explicit index operations not permitted (I'm assuming this is even on the publisher?) From BOL:
• Explicitly adding, dropping, or altering indexes is not supported. Indexes created implicitly for constraints (such as a primary key constraint) are supported.
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Sep 10, 2015
I have created a publication on SQL 2014 SP1/CU1 it is going to a distribution server also a SQL 2014 database. The subscriber is also SQL 2014 SP1/CU1. When I set it up there are no errors. I fire up Replication MGR and it looks good after the snapshot and distribution agent have been started. Again, no errors. When I do a tracer token the information gets to the distributer in 1 - 4 seconds but it never gets to the subscriber, the tracer token monitoring screen only shows pending for distributor to subscriber.
I can upload the scripts used to create the publication and/or the subscription but am a little hesitant because of server names in the scripts.
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Feb 20, 2015
Is there a script to find which non-clustered indices are replicated? I know i can do this easily through GUI , having a script will make my life much easier ....
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Jun 14, 2015
I am getting the error The transaction log for database 'ReplicationDB' is full due to 'LOG_BACKUP'.log_reuse_wait_desc from sys.databases is showing logbackup
The database is subscribed database. We configured transactional replication. But the transactional replication is getting errors and failed. Is there relation b/n this replication failures and log growth in subscriber db?
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Sep 15, 2015
We have a large database with a small number of large tables in it (and a larger number of SMALLER tables), and it is a publisher for a transactional replication scenario. When I create a snapshot to initialize a new subscription, I notice with the larger tables that sometimes it generates multiple files in the snapshot folder, usually in multiples of 16, and numbers them like this:
MyTable_3#1.bcp
MyTable_3#2.bcp
...
MyTable_3#16.bcp
With other tables, I'll get just one LARGE snapshot file, named:
MyOtherTable_4.bcp
In the latter case, the file can be very large (most recent is 38GB).
In both cases, the subscription will eventually be initialized, but the smaller files will generate separate log entries every few minutes in the Replication Monitor, showing 'Bulk Copied data into 'MyTable' (34231221 rows)', whereas the larger table will generate only ONE log entry, showing 'Bulk coping data into table 'MyOtherTable', and it may take a couple of hours before there is anything else showing...except for an entry saying, 'The process is running and is waiting for a response from the server.'
My question is: what would be the difference between the two tables that would result in one generating MULTIPLE snapshot files, the other only a single, much larger one? The only difference I can see in the table definition is that the one generating multiple files has a clustered index, whereas the others do not.
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Apr 28, 2015
Any TSQL script to monitor replication(Transactional, Snapshot) with current status ? I have tried below script but it giving error.
"Msg 8164, Level 16, State 1, Procedure sp_MSload_tmp_replication_status, Line 80
An INSERT EXEC statement cannot be nested."
DECLARE @srvname VARCHAR(100)
DECLARE @pub_db VARCHAR(100)
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Jul 17, 2007
Hello
I have server "123456" SQL 2005 On clustered environment. I added permissions to snapshot folder, it is on sharing for both nodes.
I got error during the set up as:
Microsoft.SqlServer.ConnectionInfo
Additional Information:
An exception occurred while executing a TSQL or Batch(
Microsoft.SqlServer.ConnectionInfo)
An error occurred during the execution of xp_cmdshell. A call to "Create Process" failed with error code 5
Destination path d:Microsoft SQL ServerMSSQL.1MSSQLData is not Valid. Unable to list directory contents. Specify a valid destination path
Changed database context to 'master' (Microsoft SQL Server, Error 15121)
The datafolder exists, sql cluster service account from domain added in to snapshot folder, administrators access also on this folder.
Please advice how to troubleshoot this issues. Thanks, Jay
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Jun 12, 2006
Hi,
Transactional replication allows updatable subscriptions where changes at the subscriber are replicated up to the publisher, this can happen via Immediate Updating subscriptions, Queue subscriptions and P2P (new in SQL 2005), all forms of Transactional replication.
Any compared document between merge replication and Transactional with updatable subscribtion ?
Thanks,
Tarek Ghazali
SQL Server MVP
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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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Apr 15, 2015
From distribution db, which table(s) store info about filtered data?
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Oct 22, 2015
There is a SQL Server 2008 R2 SP3 Clustered Instance that has Transactional Replication. It is by no means a large replication setup in terms of data/article count. SQL Server was recently patched to SP3 and is current on Windows 2008 R2 Patches.
When I added a new article to replication (via 2014 SSMS GUI) it seems to add everything correctly (replication tables/procs show the new article as part of the publication).
The Publication is set to allow the snapshot to generate for just new articles (setting immediate_sync & allow_anonymous to false).
When the snapshot agent is run, it runs without error and claims to have generated a snapshot of 1 article. However the snapshot folder only contains a folder for the instance (that does have the modified time of the snapshot agent execution) and none of the regular bcp/schema files.
The tables never make it to the subscribers and replication continues on without error for the existing articles. No agents produce any errors and running the snapshot agent w/ verbose output provides no errors or insight into any possible issues.
I have tried:
- dropping/re-adding the article in question.
- Setting up a new Snapshot Folder
- Validated all the settings and configurations
I'm hesitant to reinitialize a subscriber since I am not confident a snapshot can be generated. Also wondering if this is related to the SP3 Upgrade, every few months new articles are added to the publication and this is the first time since the upgrade to SP3 that it has been done.
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Nov 8, 2006
I am trying to test simple replication (only tables) of a database that resides on a SQL Server 2005 instance to a SQL Server 2000 instance. The Publisher and Distributer are set up on the SQL Server 2005 instance for Transactional replication. The subscriber is set up on in the 2000 instance. Replication Monitor shows the following error after applying a few scripts:
"Category: SQLSERVER Source SQLSERVER2000 Number: 170 Message: Line 6: Incorrect syntax near
'max'."
Here SQLSERVER2000 is the name of my 2000 instance, as should be obvious.
Beyond this point, replication fails. Any pointers as to where the problem could lie? Is this a known backward compatibility issue? I've checked all tables in the database and none contain any datatype that is new to 2005 (the database was actually created in and for SQL Server 2000.
Replication from 2000 to 2005 works fine, but the other way round is failing as described above. Any clues?
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Aug 21, 2007
Sql Server 2000
I am looking for bidirectional transactional replication using updatable subscribers (queued or immediate) . Is it possible to replicate the image data from the updatable subscribers to the publisher. I understood that the Image data can't be replicated to the publisher from the updatable subscriber. I am not using the WRITETEXT or UPDATETEXT. I am using just INSERT and UPDATE for image data type transactions.
Any thoughts on this is greatly appreciated.
Thanks in advance
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Dec 2, 2005
I'm currently trying out transactional replication with updatable subscriptions across two 2005 servers.
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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. 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. 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. SQL-P (publisher),
SQL-D (distributor) and SQL-S (subscriber). 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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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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Jul 30, 2001
On my distribution server there is a directory called mssql7
epldataunc that houses the bcp, sch and idx files for replications. A directory is created for each publication. Most directories are empty but some contain all the table idx, sch and bcp files for the publication. Some of these files are over 6 month. Does anyone know if these files are neccessary to keep and why do only some publications have these files. I am wondering if they are kept when you push the publicaiton and it errors out originally and you have to restart it? If any one can shed some like on this I would appreciate it.
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Dec 28, 2000
Hi,
I am planning to do a transactional replication from production server to reporting server. In one of my database is having 150 tables in it, only 100 tables are having primary key . Remaining tables are not have primary keys. So i am not able to do transactional replication for those 50 tables. Could any one tell me how i have to approch transactional replication. Because i need to have production data at my reporting server in regular interval.
So pls suggest me .
I am using Sql 7.0 with service pack2.
Thanks!
Kavira
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Feb 13, 2001
I have a problem with transactional replication in SQL Server 7. I have two databases (a publisher-distributor server and a suscriber server) and when I do an UPDATE in the publisher database the Log Agent Reader reads the UPDATE as an DELETE-INSERT and when the suscriber pull the suscription and try to do first the DELETE the transactional replication stops because of the Foreign Keys in the suscriptor database (that are the same as the publisher).
If anybody knows how to solve it, please tell me
Thanks
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Nov 1, 1999
I have two servers networked via workgroups (no domain) and am trying to install Transactional Replication. Everything appears to install correctly, but when I run the initial Snapshot Agent I get the following error -
The process could not create file 'CONCEPCIONC$MSSQL7ReplDatauncCONCEPCION_Erik_Rep lication_Erik_Replication19991029153207Employer.sc h'.
Access is denied.
The SQLAgent is starting with same user account on both machines - admin rights and the same password. I have added this user to the (
epldata) folder permissions as well. I even see a "Employer.sch" file in the directory.
What am I missing?
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Oct 25, 1999
Hello,
I am planning to implement replication between two servers (either snapshot/transactional). Those two servers are physically connected but we don't have domain concept i.e we connected both servers physically and it can be pinked from each other, but not under any domain (not also under different domain). How should I register SQL server& agent services to start with 'Service startup Account'. In this case I cannot start both servers using same domain Account, they how can I relate...
Thanks
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May 22, 2003
Hi guys can anyone help me with this issue. if so thankyou kindly.
1. created transactional publication (for tables, stored procs & views )
2. created empty database at subscriber
3. set up pull subscription at subscriber
4. ran the initial snapshot agent at the publisher
5. checked the schema files & found out it hadn't scripted the primary keys on the tables.
Problem: PRIMARY KEY AINT GOIN ACROSS, COULD ANYONE TELL ME IF IVE MISSED SOMETHING? THANK YOU MUCH APPRECIATED GUYS.
? Could it be that it is not picking up the primary keys on the tables because I am replicating stored procs and views with that publication?
? Should I break my publications into 3; say 1 for each object?
Thank you guys for taking the time to read this.
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Feb 24, 2005
Hi
I am tring to implement transactional replication.
How do i publish tables which donot have primary keys?...because transactional replication seems to publish only the tables which has a primary key.
Thanks
Madhukar
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May 1, 2002
Hello all! I am setting up my first Replicated database, and want to get this right.
We are a Newspaper, and I will be Publishing the database that is the back end of the web server. The goal is to load balance the web site as well as to have a second identical server in case something goes wrong. Both the Subscriber and the Publisher need to be kept in sync as new articles are posted, so my client will just be updating the Publisher. But I'd like to keep a single set of usage statistics, so I was thinking of using Immediate Updating so the Subscriber can update the Publisher using two-phase commit.
What will happen if the Publisher shuts down and an update is attempted on the Subscriber? Will it just hang? Let's assume the worst - what if my Publisher is kaput? How do I determine that my other database is a Subscriber; and how do I stop it from being a Subscriber?
Thanks in Advance,
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Jun 28, 2002
Hi
I have a requirement for pushing transactional publication to various subscribers. Each subscriber will need to receive a different subset of rows from a table. So I need all rows published, but with horizontal filtering at subscriber level. Is there a way of applying filtering at the subscription level.
Thanks
Tariq
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