Here's a good one for any Oracle gurus out there. I'm working on a web page that dynamically configures Oracle DB backup settings in a closed environment. Right now, I have everything set up to generate scheduled jobs that run pre-determined RMAN scripts that already exist on the Database server's disk. This works, but I want to go a step further.
Is there any way to create jobs with the scheduler that will run RMAN scripts which haven't first been written to disk? For example, is it possible to fire off an RMAN backup script directly from the scheduler by using a pipe of some sort? I've found some vague information on the RMAN Pipe Interface, but I can't see how I could create a private pipe, pack it with RMAN commands, and then feed it to RMAN all in one job run... Any thoughts would be very much appreciated.
In anything related to backup/restore of the database, I advise you to prefer OS's means to execute scheduled jobs (cron/at on unix, Scheduled tasks on Windows). The advantage is that they are independent from oracle instance and you can better handle cases when oracle instance is down or malfunctioning. The "RMAN pipe interface" is meant to be used together with operating system's shell, as well.
However, executing scripts directly from database is also possible: AskTom
If you want to use DBMS_SCHEDULER then the script has to reside on the database server.
But if you install an Oracle client on the web server you can run RMAN from there and connect to the TARGET database. E.g.:
rman 'usr/pwd#conn_str AS SYSDBA' CMDFILE /home/www/db/backup-full.rman
In this case the script can reside on the web server.
Hope this helps.
Related
Say I have a SQL script physically stored on the database server. Is there a SQL command I can send Oracle from an application to tell it to execute that script?
(Yes, I know this sounds ridiculous. I'm considering it as part of a work around of a very nasty problem that "shouldn't happen" but does.)
The easiest option would generally be to use the dbms_scheduler package to run an external job. This would let you invoke a shell script that started SQL*Plus, connected to the database, and ran your .sql script.
It would also be possible to create a Java stored procedure that uses Java's ability to call out to the operating system to run the same shell script. That tends to be a bit more of a security issue, though, since you're ending up granting the owner of this procedure privileges to run any command on the database server as the oracle user. That would include things like connecting to the database as SYSDBA or corrupting the database (accidentally or intentionally) so it's something that auditors would generally frown upon.
I'm a SQL Server DBA, but we have an Oracle 10g database that I need to start performing daily backups on. We do not have Enterprise Manager. Is there a way to schedule a daily backup in Oracle like in SQL Server?
I apologize if this question is severely elementary for Oracle people, but I've had a very tough time trying to research this and coming up with an answer other than "Use EM".
Easiest in your case is to make a simple Windows Batch script that set ORACLE_HOME and PATH and uses rman to make the backup. Schedule the script in the Windows Task scheduler. Assuming your database is production and because of this runs in archive log mode your script could be something like this:
(I am not a Windows expert so subtle errors might be easy to spot for you)
rman_backup.bat:
ORACLE_SID=your_oracle_sid
ORACLE_HOME=d:/where/your/installation/is
PATH=%ORACLE_HOME%/bin;%PATH%
rman cmdfile=your_rman_actions_script.rman log=your_log_file.log
your_rman_action_script.rman looks like
connect target=/
backup DATABASE PLUS ARCHIVELOG;
For documentation look at Oracle 10g database documentation and start with 2 day dba. After that check out the backup docu found here Administration
I would (but then, my background is more on Unix, less on Windows) do the scheduling from outside the database, using the OS Scheduler to run a backup script. Assuming that no real backup system is available.
In the beginning of backup, you would run a SQL script to place the tablespaces in backup mode (ALTER TABLESPACE x BEGIN BACKUP), then back up the tablespace data files, and after that restore normal mode (ALTER TABLESPACE x END BACKUP). PL/SQL can be used here for looping over all tablespaces.
After that, you'd back up the control file (ALTER SYSTEM BACKUP CONTROLFILE ...), and finally you would rotate the redo logs enough times that all relevant log data has been archived, and back up the archive logs.
And as of doing incremental backups f.ex. throughout the working week, just do the log rotation & archive log copy part.
I have a machine running Oracle 10g server in windows server 2008. I want to take backup of the database. I also want to take backup of some files saved on hard disk by oracle server that users have uploaded using my website.
I can connect to the Oracle server using sql developer and sqlplus. I can run sql queries on the server.
In order to take backup of database I have to run the command "exp" (this is the only way of taking backup of databases that I know). There might be some other way but there is another problem because of which I must run dos command. That problem is to take backup of files. These files are stored in c:\mydir. The folder mydir is not accessible anyway through web and is not a shared folder.
I have tried running "host " in sqlplus after connecting to oracle server, that is at "sql>" prompt. The command ran successfuly but at local machine, not at oracle server.
Edit: The "host" command is provided by sqlplus and is not an oracle command, means cannot be used in a query. Sqlplus even when connected to remote machine run the "host" command at local machine.
The target is to either make sqlplus run the "host" command at remote machine, Or run the dos command from inside a pl/sql query (independent of sqlplus).
In addition to what Justin has written:
If you want to take a logical snapshot of the database the new DataPump tool is preferred over the old (and deprecated) exp tool.
DataPump is a commandline tool (expdp) but also has a SQL API through Oracle packages and procedures.
The Data Pump API (including examples)
DBMS_DATAPUMP (reference)
But if you want a "real" backup you should look into RMAN
It is possible to create a Java stored procedure on the database server that executes an operating system command on the Oracle server. But it would be extremely unusual to use the export utility to backup a database-- that only creates a logical backup not a more appropriate physical backup. And it would be extremely unusual to run a backup by connecting to the database via SQL*Plus and spawning a job on the server operating system. It would make much more sense to create a job using the Windows scheduler on the database server that ran whatever export commands you want to run.
Now I'm too keen to know how can I export dmp file with Oracle jobs? It's because of I'm very new to Oracle and don't know how to backup Oracle with jobs like MsSQL bachup with schedule. That's why I want to know what I asked.
You can fairly easy setup a backup scheduled by the database. Best approach for this is to install the Oracle Scheduler Remote Job Agent - local to the database - and configure that agent in the database that holds your backup schedule. This can be the database itself, it can also be a central backup schedule database, all a matter of taste.
Oracle Scheduler is very powerful and can execute tasks in the local database, in remote database[s], on the local server and on remote servers. If using OS type of jobs, best is to use the 11g Remote Scheduler Agent. Don't use the old fashioned 10g style External Jobs. Use remote jobs with defined credentials.
For help look at my blog where you also find pointers to docu.
After you installed and configured the job agent to be a valid target for the database that performs the scheduling, easiest is to use dbconsole to define the jobs. If you configure the dbconsole, it also gives an option to generate auto backup jobs. Maybe this is already enough. You asked for export and there expdp with the Oracle Scheduler does a wonderful job.
You can run an OS process from Oracle Job using Java Stored Procedure or a C program.
See this blog entry,
Instead of exporting dump using the old imp/exp utilities to generate dmp files, look at Oracle Datapump, especially since from the tags I infer you're using Oracle 11g.
Data pump supports table-level, tablespace-level, schema-level & full export modes and is kown to be consdirably faster than the previous imp/emp tools.
Further reading:
Export/import with Oracle Data pump
Oracle Documentation on Data pump
know how can I export dmp file with Oracle jobs?
That's not possible. The emp tools runs outside the database, while jobs run within. if you want scheduled exports perhaps you could use a cronjob/scheduled task.
I need to automate a selective table / user object backup I currently am doing via PL / SQL Developer.
The way I currently do it is via Tools/Export Tables and Tools/Export User Objects, manually select tables / objects, then set the options, choose destination and export. I do this from a windows laptop and the database is located in a suse linux server, both are in the same LAN. DB is running 24/7 and can not be shutdown. Also currently my oracle programming skills are very basic as I only do maintenance to this solution. I would like to keep doing the backup process in the windows laptop, but I would consider a server side script solution also and then retrieving the .sql files from server.
Thanks in advance
I wouldn't really call it a backup, but look at exp/imp and expdp/impdp (data pump) in the Utilities manual
As Gary implies exp/imp really isn't a backup solution. If this database is important to you or others, figure out how to use RMAN , which is usually configured to run in a mode that doesn't require the database to be shut down. Although it executes on the database host and for non-tape destinations must write its files to a filesystem attached to the host, it can be launched remotely.
RMAN is aimed at restoring/recovering the entire database, so if what you're looking for is only the ability to recover isolated objects it may not be for you.