Keep alive sybase database connection

Question

Hi,
How we can keep connections alive. In our application we are using java as frond-end and making connection to sybase database server using jconnect. We are firing big queries which took generally more than two hours to run. But firewall drops the connection which are ideal for more than 1 hour.
So, is there any way out to keep those connections alive.
Thanks in advance.

Answer 1

Anup_Agr wrote:
Hi,
How we can keep connections alive. In our application we are using java as frond-end and making connection to sybase database server using jconnect. We are firing big queries which took generally more than two hours to run. But firewall drops the connection which are ideal for more than 1 hour.
So, is there any way out to keep those connections alive.Yes but that would be a poor solution.
You shouldn't be attempting to run a job that takes that long. Googling certainly suggests that Sybase supports scheduled jobs.
That suggests the following
1. Create a job queue (table)
2. Create a scheduled task to process tasks in the job queue.
3. Modify your app to put a task in the job queue.
4. Modify your app to query for a complete job at some reasonable interval (like minutes.)
And you might look further at the design and requirements for that matter. For example there is no point in running a 2 hour job 15 times a day that returns the same results because 15 people want the same results. Instead run the job once at midnight and keep the results and return those each time for the 15 requests.
Even if the jobs are different sometimes the data can be munged in a nightly process to make it more efficient. For example create a summary for each account. Then a sales report for a specific sale rep just collects the existing summaries rather than summerizing it each time.