Hi,
We have a server in production currently and are thinking about
implementing clustering to achieve load balancing and scalability.
Currently we have some processes that run nightly, for example
1. Users upload files that are processed later at night.
2. order updates (we retrieve all orders from db to determine if they
have been delivered using Fedex's web service, etc).
3. Manifest submissions - generate a report from the orders of the day
to submit to various companies via FTP
The above are just some examples. As you can see, we have a fair amount
of stuff going on in the background during off peak hours.
My question is this. Once we implement clustering, how can the above be
handled. The above processes cannot be running on all instances of the
tomcat servers. For example, if a file is uploaded for processing later,
then that file should be processed only once, but as many times as there
are server instances (since they are all running same copies of the
application code).
I hope my concern makes sense, and would appreciate some insight into
this before we consider this cluster implementation further.
Thanks,
-Rizwan Merchant.
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