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Smple replication question ???


Smple replication question ??? calderara
7/3/2007 12:58:03 PM
sql server replication:
Dear all,

I am building a n tiers application which is based on SQL server 2005 and
..NEt 3.0.
I have a buisness logic layer which send information to the database layer
to store certain type of data to SQL.

Then at a specific client application event, like a simple buton clik event,
I need to start the replication of my actuall tables to an other server.

Is there a way to trig the start of the replication based on a particlar
action event.
For example the following flows :

Buton_Clik For replication --> Business Logic recive the event -> DataLayer
call a particular SQL function which fires the replication.

Is this possible ?

Or is it better instead of replication, to call stores procedure which copy
tables data from source to destination server ?

When data gets replication I need to flush exported data from the source
tables

Thanks for comment
regards
RE: Smple replication question ??? Paul Ibison
7/4/2007 6:54:01 AM
You could set up a snapshot publication. Have the button click trigger the
snapshot agent job and then the distribution agent job. The main problem with
this approach is the locking of the publisher's tables while the snapshot is
being prepared. Is this permissable? If not, then you might want to check out
the option to set @sync_method = 'database snapshot'. Still involves some
locking but might be an acceptable level.
HTH,
RE: Smple replication question ??? calderara
7/4/2007 12:08:00 PM
Thnaks for your reply

how to trigger the snapshot agent job and then the distribution agent job
from a Button Click event of a CLient aplciation (WindOFrm here) ?

By the way I manage to setup a publication and disitribution using
Transactional method and Push , in order to replicate selected tables to a
remote server. It works fine at this phase.

With this solution :

- Does the replication process handle itself potential locking situation ?
- Is there a way to flush replicated data on the publisher from the
subscriber ?

Once data gets replicated on remote server I do not need to keep the same
data on the publisher.

Thnaks for help
regards
serge

[quoted text, click to view]
RE: Smple replication question ??? Paul Ibison
7/5/2007 1:24:02 AM
Just using sp_start_job will work fine to start the agents or you can use the
RMO api (http://msdn2.microsoft.com/en-us/library/ms147890.aspx).

To get subscriber data to the publisher you'll need some sort of updating
subscriber setup - either transactional with immediate updating/queued
subscribers or merge.

Locking is only an issue if there is blocking. In this case there might be a
timeout but no data will be lost.

If you remove data from the publisher then it'll get deleted from the
subscriber. There is a way to not replicate deletes though - is this what
you'd need?

HTH,

RE: Smple replication question ??? calderara
7/5/2007 12:44:01 PM
thanks for your reply paul...

The idea on my case to replicated data to a remote server is used as a
centralise history data. When data gets transfer, ideally I would like
effectivly to flush data from the publisher becasue I do not need them any
more has they ahve been transfert. But I need to be sure before flushing them
that transfert succeed.

So if part of publisher data gets deleted, I do not want to delete the one
from my subscribers. And any other new or inserted data must be transfert.

How to do that ?

thnaks for your help
regards
serge

[quoted text, click to view]
RE: Smple replication question ??? Paul Ibison
7/6/2007 1:24:00 AM
You can set the delete command to 'NONE' on the snapshot commands tab. The
downside of this is that all the deletes will be prevented, not just the
archiving ones. If you are only logically deleting records in normal working
then this will not be an issue though.
HTH,
RE: Smple replication question ??? calderara
7/9/2007 12:14:01 AM
HI paul,

Thnaks to all you reply..
Let me explain you a bit the environement we are working on , then you might
have a great idea to solve my issue...

We have an industrial application(developed with VB) which is in charge to
collect measure data from different running machines. Those data gets
collected and archives in a local database. Then if our customer would like
to centralize those data, we install him an export solution into an SQL
server data base £(develop with VB). Today as a local database we are using
Microsoft Access ( which is not suitable anymore), and periodically or based
on user action, data gets sent to SQL server through ODBC ( really bad).
After a while, exported data are them deleted from lcoal database.

Today we are changing all of this, the local database will be replace by SQL
server 2005 satandard edition, and in case our customer woul like to export
those data, we can ask him to provide an SQL server 2005 server on which we
configures our tables. the advantgae here will be that we can manage the
export of data without having to develop anything as SQL server can take care
of that. Thats why I was thinking of replication.

Then I make some testing using the transctional, and pull method.. But as
you emntioned to me if data gets deleted from the source there will be
deleted to the destination. And this absolutly what I would like to avoid. I
simply just want to archive them automatically.

BAsed on that requirements, shoudl I better set the replication as snapshot
instead ?
Does deleted dat will be also deleted ?

regards
serge



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Re: Smple replication question ??? calderara
7/9/2007 5:50:01 AM
Where can I find this Snaphot tab ????
Can not find it . I have to send the delete commande to none from Subscriber
or publisher side ?

[quoted text, click to view]
Re: Smple replication question ??? calderara
7/9/2007 7:34:02 AM
Hi paul,
i find out where are those snapshot properties, was hard to located them :-)
as newbie as I am in SQl environement.

i will test it as you mentionned on previous mail

thansk again
serge

[quoted text, click to view]
Re: Smple replication question ??? Paul Ibison
7/9/2007 9:36:04 AM
You should be alright just avoiding the replication of deletes: set the
delete command to 'NONE' on the snapshot commands tab.
HTH,
Paul Ibison

Re: Smple replication question ??? Paul Ibison
7/9/2007 6:13:19 PM
On the publication properties - the elipsis button fo rthe article brings up
a form with the snapshot tab there.
Cheers,
Paul Ibison

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