How can I transfer files from a DB server to an external server and then return them to the DB using a 'middle' server?
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In more detail:
- Start a database procedure to generate an exchange file and transfer this file to a "middle" server.
- Determine the size of the transfer file on the middle server and use a script to transfer this file to an external server.
- Process data on the external server and confirm that the result file have been generated before starting a script on the middle server to transfer the file from external server to the middle one.
- After the script in step 3 has finished transferring the file from the external server, start a database procedure to import the transferred file to the database.
The file movements would look like this:
In particular, I want to know how to invoke remote script and DB procedure? I checked the document in your official website but didn’t get any clue about this. Can jobscheduler fulfill our requirement?
Thanks.
Solution
There are several ways to implement such a scenario.
A typical workflow would be to use a single JobScheduler installed on the middle server with a job chain with several steps:
Step (1) start the db report. you can use the SQL*Plus, PL/SQL or the ManagedDatabase jobs from the JITL package.
- Step (2) check the size/existence/content of the output from step 1 using the
existsFilejob from the JITL-Package. - Step (3) transfer the file from the middle server to the external one using, for example, sFTP and the JADE-Job from the JITL package.
- Step (4) start the processing on the external server using SSH.
Step (5) Use sFtp and the JADE-Job to transfer the result of step (4) to the middle server.
Step (6) Start the processing of the result file using, for example, SQL*Plus or PL/SQL.