How can we make SAP system READ ONLY !!!!!

Question

Hi, we have an SAP R/3 4.6 C Application. We need to take the system for read only state means we don’t want the users to allow any update for the system but they should be able to view the data what they have created. Mean while we don’t want the database to be taken in read only mode as we the administrators or the users might want to update their password information.
It would be a big help if some one can through some tips on how we achieve this.
Thanks much in advance.
Guru

Answer 1

Hi
         Please make the database in READ ONLY MODE. This will help. If it is an oracle database then.
Open a Database in Read-Only Mode
You can open any database in read-only mode to prevent its data from being modified by user transactions. Read-only mode restricts database access to read-only transactions, which cannot write to the datafiles or to the redo log files.
Disk writes to other files, such as control files, operating system audit trails, trace files, and alert files, can continue in read-only mode. Temporary tablespaces for sort operations are not affected by the database being open in read-only mode. However, you cannot take permanent tablespaces offline while a database is open in read-only mode. Also, job queues are not available in read-only mode.
Read-only mode does not restrict database recovery or operations that change the database's state without generating redo data. For example, in read-only mode:
Datafiles can be taken offline and online
Offline datafiles and tablespaces can be recovered
The control file remains available for updates about the state of the database
One useful application of read-only mode is that standby databases can function as temporary reporting databases
Opening a Database in Read-Only Mode
Opening a database in read-only mode enables you to query an open database while eliminating any potential for online data content changes. While opening a database in read-only mode guarantees that datafile and redo log files are not written to, it does not restrict database recovery or operations that change the state of the database without generating redo. For example, you can take datafiles offline or bring them online since these operations do not effect data content.
If a query against a database in read-only mode uses temporary tablespace, for example to do disk sorts, then the issuer of the query must have a locally managed tablespace assigned as the default temporary tablespace. Otherwise, the query will fail. This is explained in "Creating a Locally Managed Temporary Tablespace".
Ideally, you open a database in read-only mode when you alternate a standby database between read-only and recovery mode. Be aware that these are mutually exclusive modes.
The following statement opens a database in read-only mode:
ALTER DATABASE OPEN READ ONLY;
You can also open a database in read-write mode as follows:
ALTER DATABASE OPEN READ WRITE;
However, read-write is the default mode.
Regards