Anycable on production: tips and tricks

No rack middleware

• That means all Rack-middlewares are unavailable and don’t work out of the box with AnyCable
• And if you need any of its functionality you should build workarounds manually
• Example: Warden middleware (devise gem)

• Method "stop_all_streams" not working (from active to passive)
• There are no long-lived objects inside AnyCable. All objects get instantinated only at a time of RPC call
• Drawback — now ActiveRecord objects used as Channel identifiers may additionally hit DB
• If possible - do not use database in AnyCable
• Disconnect remote clients : Nope

          fs.file-max = 184028

          net.ipv4.tcp_keepalive_intvl = 8
          net.ipv4.tcp_keepalive_probes = 5
          net.ipv4.tcp_keepalive_time = 180

          net.ipv4.tcp_tw_reuse = 0
        

<Thank You!> Questions?