Multiple Distributors For Merge Replication.

Oct 2, 2007

I have 1 publisher in MI and 3 pull subscribers (1 local subscriber in MI and 2 in NC).

I am trying to decide whether to use a central distributor or a distributor per subscriber. It is my understanding that if I use a central distributor, large transactions that are being process will block other transactions from happening and increase latency. Most of the transaction will be relatively small, but several times during the day clients update large amounts that cannot be predicted. I want to make sure the other locations are not waiting on a large update to be processed through the distributor.

My current plan is to create subscribers with their own distributor. What are the issues with doing that over a central distributor?

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Bidirectional Transactional Replication And Remote Distributors

Nov 27, 2006

I want to be able to setup the following configuration using bidirectional transactional replication on SQL 2005

instance A lives on machine 1
instance B lives on machine 2

Instance A publishes to a transactional subscription on Instance B
Instance B does the reverse and publishes to a transactional subscription on Instance A

Instance A pushes to a distribution database on machine 2
Instance B pushes to a distribution database on machine 1

Problems Implementing Configuration

I can setup each instance as a distributor and create separate distribution databases using
sp_adddistributor and sp_adddistributiondb

I can then enable each publisher to use the correct distribution database using sp_adddistpublisher

However, when I try and run sp_replicationdboption to setup a database for publication, I get the error:

Msg 20028, Level 16, State 1, Procedure sp_MSpublishdb, Line 55
The Distributor has not been installed correctly. Could not enable database for publishing.

If I try and configure a publication with the wizard, it says that instance A must be enabled as a publisher before you can create a publication - and then presents the dialog to add instance A to be handled by the local distribution database - which I don't want.

It appears that I need to run sp_adddistributor on the publisher as well as the distributor for the appropriate instance, but if I do this I get the error:

Msg 14099, Level 16, State 1, Procedure sp_adddistributor, Line 109
The server 'instance A' is already defined as a Distributor.

It seems that you can't select a remote distributor if you already have a local distributor configured.

Is there a way round this limitation?

Note that configuring the environment with a single distribution database works fine

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Multiple Distributors From A Single Publisher?

Mar 7, 2013

I am setting up a 40 subscriber node transactional replication environment (pull), and was looking to have 2 or more distributors service one publisher, each having a group of subscribers, is there any benefit to this ?, as opposed to having one distributor service all subscribers, is it possible (distributor at instance level ?)

From what I've seen, I could not find anything that shows multiple distributors to one publisher.

Publisher and Distributor are on separate physical hosts.

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Replication :: Difference Between Snapshot And Transaction And Merge Replication?

May 26, 2015

What is the main difference between snapshot and transactional and merge replication?

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How To Merge Multiple Rows One Column Data Into A Single Row With Multiple Columns

Mar 3, 2008

Please can anyone help me for the following?

I want to merge multiple rows (eg. 3rows) into a single row with multip columns.

for eg:
data

Date Shift Reading
01-MAR-08 1 879.880
01-MAR-08 2 854.858
01-MAR-08 3 833.836
02-MAR-08 1 809.810
02-MAR-08 2 785.784
02-MAR-08 3 761.760

i want output for the above as:

Date Shift1 Shift2 Shift3
01-MAR-08 879.880 854.858 833.836
02-MAR-08 809.810 785.784 761.760
Please help me.

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How Do We Add A New Column To A Merge Replication Article, But Specify It As Not For Replication?

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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Merge Replication Set Off Transactional Replication

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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One Way Merge Replication

Feb 14, 2002

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.

Thanks in advance