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03.01.2007 at 03:00AM PST, ID: 22421070
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Options for database replication with Microsoft SQL Server

Tags: replication, sql, database, server
We have a CRM database (accounts/contacts/activities) which we would like to replicate between five locations. These locations will all be doing similar things - updating existing details, adding new accounts, contacts and activities. We would like to keep all the data replicated between all locations so that when all replication has been completed all the databases will match.

IDs for the records are controlled through a "counter" table, so it should be possible to avoid collisions by assigning different counter ranges for each database.

We would like everything to run automatically in the background with minimal user intervention.

The application itself has been written with no provision for replication, so I am investigating options for some other software to run to perform this task and would like to hear from the Experts what my options are.

One option of course is native SQL Server replication. The last time I looked at this I believe all the tables needed to have GUID columns added for this replication model, however this has the problem that the software cannot have its tables modified. But I do have a "cunning plan" which I would be curious to get feedback on. I could create one-to-one links between existing tables and new tables, where the new table does have a GUID column, and create views to present these two tables as a single whole. Could I then set up the replication to work with these views?

All feedback appreciated - whether native replication or some other application would be the best solution.
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Question Stats
Zone: Database
Question Asked By: purplesoup
Solution Provided By: andrewbleakley
Participating Experts: 1
Solution Grade: A
Views: 12
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03.10.2007 at 12:52AM PST, ID: 18693182

Rank: Master

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03.10.2007 at 12:52AM PST, ID: 18693182

Rank: Master

My experience that won't work and even if you could trick SQL initially it will bite you hard later on.
Is there a reason these five sites could not all utilise a single SQL server over a VPN/WAN/Internet. You obviously have some method of connecting if you are trying to replicate. SQL Server replication works fantastically but you have to respect the changes it makes otherwise it will stop replicating.
I have seen people in desperation add triggers or DMO to move data between servers as required, depending on the amount of data and number of objects
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