I'm not familiar with the internals of Sidekiq and am wondering if it's okay to launch several Sidekiq instances with the same configuration (processing the same queues).
Is it possible that 2 or more Sidekiq instances will process the same message from a queue?
UPDATE:
I need to know if there is a possible conflict, when running Sidekiq on more than 1 machine
Yes, sidekiq can absolutely run many processes against the same queue. Redis will just give the message to a random process.
Nope, I've ran Sidekiqs in different machines with no issues.
Each of the Sidekiqs read from the same redis server, and redis is very robust in multi-threaded, and distributed scenarios.
In addition, if you look at the web interface for Sidekiq, it will show all the workers across all machines because all the workers are logged in the same redis server.
So no, no issues.
来源：https://stackoverflow.com/questions/13213499/can-multiple-sidekiq-instances-process-the-same-queue