Question

In my application I am running a windows service on a Webserver.
This service calls a single table and select and update the table.
When this service is deployed on multiple webservers, How can I prevent
deadlocks on the table from this service running on multiple webservers.
What happens, when this table is accessed by 2 services from different
webservers same time ?.
What are the other neccessary precautions I need to take.

Gracias

Answer 1

The database handles locking within a transaction for you. What you need to do is to ensure that

1. All associated operations occur within a transaction.
2. You have the right transaction isolation level.

If you read data, wait for some user input and then do the update you have to decide whether do use optimistic or pessimistic concurrency control.