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Multi-user environment


Multi-user environment gaba
7/25/2005 3:29:02 PM
sql server msde:
Hi,
I’m working on a project that has MSDE installed on a Server (Windows Small
Business Server 2003 Standard with Veritas Backup V.9.1) for the back-end
database and for the front-end an Access Project (.adp) which I plan to have
on each user's computer.
The Server Administrator is pushing for an update to SBS 2003 Premium with 5
licenses as the only solution. Personally I think MSDE would do the job…
There are few things I’m not so sure:

- How many users can access the server at the same time with MSDE?
- Is there a way to let the user know if a record is being used? Like
displaying a message before any changes are made?
- I’ve created a table for users with username, password and group they
belong to. Is there a way to integrate this with the MSDE Groups and
Permissions or Transact-SQL? So Users, passwords and Groups can be setup from
a form in the front-end.

I’m doing some research on Veritas and see if it would backup the Instance
of MSDE.

Any help on this matter would be greatly appreciated

--
Re: Multi-user environment Andrea Montanari
7/26/2005 12:00:00 AM
hi,
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it's not a matter of users but concurrent batches... a study by Microsoft
indicates a magic number of 25, but it really depends on the application
type/design, database type/design...
of course bad ADO serverside cursors design will be worse then excellent
clientside disconnected design code...
but actually there's no limit, just the buuilt-in Workloads Gevernor that
kicks in when more then 8 concurrent batches are in progress... you can have
a look at
http://msdn.microsoft.com/library/?url=/library/en-us/architec/8_ar_sa2_0ciq.asp?frame=true
fro further info about that governor...

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actually not... you have to test saving and trap the relative exception...

[quoted text, click to view]

I think you've better drop your user tables and rely on the standard SQL
Server users and roles...you are duplicating all and incurring in troubles..

--
Andrea Montanari (Microsoft MVP - SQL Server)
http://www.asql.biz/DbaMgr.shtm http://italy.mvps.org
DbaMgr2k ver 0.14.0 - DbaMgr ver 0.59.0
(my vb6+sql-dmo little try to provide MS MSDE 1.0 and MSDE 2000 a visual
interface)
--------- remove DMO to reply

RE: Multi-user environment gaba
7/26/2005 7:31:02 AM
Andrea,
Thanks so much for your answer. I see I need to change directions in few
settings but I'm on the right track. A lot of information to catch up...

--
gaba :)


[quoted text, click to view]
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