Is it possible to use InProc mode for sessionState in case of web garden?
InProc mode for session state is not suitable for use in a web garden scenario. InProc mode stores session state data within the memory of the web server process (w3wp.exe). In a web garden configuration, multiple worker processes (w3wp.exe instances) are used to handle incoming requests on different servers or cores.
Using InProc mode in a web garden configuration can lead to several issues:
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Inconsistent Session Data: Each worker process in the web garden will have its own separate memory space for storing session data. If a user's requests are served by different worker processes, their session data will not be shared between the processes. This can result in inconsistencies or loss of session data as the user's requests are not consistently directed to the same worker process.
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Session Data Corruption: InProc mode relies on in-memory storage within the web server process. When multiple worker processes are running simultaneously, they cannot directly access each other's memory. As a result, if a user's request is routed to a different worker process than the one that initially created the session, that process will not have access to the session data, leading to potential data corruption or incorrect behavior.
To overcome these issues in a web garden scenario, it is recommended to use out-of-process session state modes such as StateServer or SQLServer. These modes store the session data outside the web server process and provide mechanisms for sharing and synchronizing session data across multiple worker processes or servers in a web garden.
By configuring your application to use StateServer or SQLServer mode, you can ensure that session data is properly shared and consistent across all worker processes in the web garden configuration.