When designing environments, we always think about the high availability of the different components. Two is one, one is none! So when designing a ShareFile environment I want at least two StorageZone Controllers (SZC) for every StorageZone. Because most Citrix environment already contain a NetScaler it’s my preferred method to also use the NetScaler for load balancing the StorageZone Controllers. Nowadays the Citrix NetScaler has some nice wizards build in to assist¬†you deploying the ShareFile configuration.

Two is one, one is none. Load balance the StorageZone Controllers!

The wizard however will use the “tcp-default” monitor to check the service state. This means the NetScaler appliance establishes a 3-way handshake with the monitor destination, and then closes the connection, to check if the destination is up. Although this is configured by the wizard and a best practice, I believe this is a weak spot in my HA setup. I have seen situations where the SZC server was running, but the ShareFile services were not responding correctly. A simple tcp monitor will not notice this!

The NetScaler ShareFile wizard uses the default tcp monitor

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