[p4] How to sync between two perforce server depot code ?

[Vladimir Sim]

Hi,

Anyone know how to sync the code between two different location perforce
server depot code
automatically without any user operation.

I need to sync my local server code to my HQ server depot code automatically
at night.

I have use the proxy machine which allow me to sync my local code to a
remote client machine
but I do not know how to auto sync this client machine code to my HQ depot
server
automattically without user operation.

Please advise.

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Best regards,
Vladimir Sim