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Is Replication Too Much



Is Replication Too Much Ken Ptaszynski
6/28/2005 6:33:01 PM
sql server replication: We are developing a system for a manufacturing operation. The planned
approach is to develop stand alone data capture applications using MSDE for
the database. The production data from these systems needs to be posted to a
central SQL database. All systems will be in the same building. We plan to
roll out this system to a number of facilities. The number of data capture
systems could range from 5 to 25. Data Transfer requirements include: 1)
Master data from the central system will need to be sent to the data capture
machines (updated 4 times a day). 2) Production order informtation will be
sent to 1 or more data capture machines (updated as orders are scheduled to
production lines). 3) Production data from the data capture machines will
need to be sent in a timely manner because 4) Summary Production data (totals
by production order and material) is needed by the data capture machines to
prevent overruns.

The current application we have uses a separate VB application to update the
stand alone and central database. Users are given a message when the central
database cannot be accesssed, however, the stand alone machines must continue
working.

Would replication be a good design for this scenario? or is it overkill? I
have heard the replication is a resource hog, we will have only the central
server to work with.

Other information:

Production data on the stand alones need only be kept for a few days, after
that it can be purged.

Production records (single table) can be created every 6 seconds, updates to
central database can be queued.

Master data consist of 6 tables that are used for look up purposes by the
application running on the stand alone systems.

There are 2 production tables (Header and detail). Application displays
summary production (for detail record) by current system and across all
systems.

Re: Is Replication Too Much Hilary Cotter
6/28/2005 9:50:17 PM
Who told you replication is a resource hog? Running on property sized
hardware and with a well designed topology (minimal use of filters, etc),
the performance impact should range around 10% or less. If you are running
this on Pentium III hardware naturally performance will not be optimal.
Running it on Pentium IV 2 GHz or more (or some of the modern AMD
processors) with ample RAM (2 Gigs or more) you should be fine.

I think you should use merge replication for this. You can't use
transactional as MSDE can't be a transactional publisher.

--
Hilary Cotter
Looking for a SQL Server replication book?
http://www.nwsu.com/0974973602.html

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