I am new to Sql server and hope that someone in here might be able to help me out with a little advice on how to go about how to achive the following.
My boss wants me to set up a copy of one of our production databases, the copy is supposed to be used for running questions against thru businessobjects. There will be aprox 10 simultanious users, the original and the copy must never be further apart in time then 15 min. The database is today about 25 gigs and to make it even more complicated the copy must be available at all time during business hours (8-17). The solution is also supposed not to influence the production databases perfommance to much (really low impact to the performance is a key issue).
The options I have thought of is:
1. Use mirroring and then take a snapshot of the mirror for the users to connect to.
2. Replicate only the data that is needed.
3. Log shipping in a combination with the online restore option in sql 2005 server.
4. Log shipping and then take a snapshot of the copy for the users to connect to.
I have also thought about if the need for current data is that high it might even be better to let them run their questions directly against the production db instead since there will not be so many simultanious users.
Any of you guys that have any ideas, all tips will be very appreciated!
I set up DB mirror between a primary (SQL1) and a mirror (SQL2); no witness. I have a problem when I issue command:
alter database DBmirrorTest Set Partner = N'TCP://SQL2.mycom.com:5022'; go
The error message is:
The remote copy of database "DBmirrorTest" has not been rolled forward to a point in time that is encompassed in the local copy of the database log.
I have the steps below prior to the command. (Note that both servers' service accounts use the same domain account. The domain account I login to do db mirror setup is a member of the local admin group.)
1. backup database DBmirrorTest on SQL1
2. backup database log
3. copy db and log backup files to SQL2
4. restore db with norecovery
5. restore log with norecovery
6. create endpoints on both SQL1 and SQL2
CREATE ENDPOINT [Mirroring]
STATE=STARTED
AS TCP (LISTENER_PORT = 5022, LISTENER_IP = ALL)
FOR DATA_MIRRORING (ROLE = PARTNER)
7. enable mirror on mirror server SQL2
:connect SQL2
alter database DBmirrorTest
Set Partner = N'TCP://SQL1.mycom.com:5022';
go
8. Enable mirror on primary server SQL1
:connect SQL1
alter database DBmirrorTest
Set Partner = N'TCP://SQL2.mycom.com:5022';
go
This is where I got the error.
The remote copy of database "DBmirrorTest" has not been rolled forward to a point in time that is encompassed in the local copy
if i have a given database (a model) and i want to copy this database in the same database instance. Is it ok to copy the mdf and ldf file and attach the files with a new database name in the same instance.
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I thought the code would go something like this:
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I have a requirement to host 100 isolated databases for the purpose of multi user environment where each user has it's own database. This is due to security restrictions that why it was requested to be such.
1. What I'm recommending is to setup servers with 256GB of RAM to host multiple databases. Are there servers which can accomodate 256GB? Is this optimal with regards to performance? Or should I break it down to smaller servers with less RAM?
2. Is there a way to determine the CPU requirements for the DB server, taking for example we have 20 databases per DB instance? Are there any best practices / calculators available?
3. Additionally, data from the 100 DB's needs to be consolidated into 1 central repository for Analytics purposes. What I'm looking at is to utilize SQL Server transaction replication. Is there any drawback with this approach? Are there any other approach we could use to easily replicate data across 100 database back to 1 central repository?
