![nginx map configuration allocates traffic to different back-end services according to different request headers nginx map configuration allocates traffic to different back-end services according to different request headers](https://programmer.group/images/article/bdc655fb91283e8adf8f6fcd8010fe3c.jpg)
nginx map configuration allocates traffic to different back-end services according to different request headers
![nginx map configuration allocates traffic to different back-end services according to different request headers nginx map configuration allocates traffic to different back-end services according to different request headers](https://programmer.group/images/article/6c363ae431583b3854bd6e8495b50613.jpg)
nginx map configuration allocates traffic to different back-end services according to different request headers
Upgrade from 0.27.1 to 0.28.0 failed: could not build variables_hash, you should increase variables_hash_bucket_size: 128 · Issue #5030 · kubernetes/ingress-nginx · GitHub
nginx should auto-tune server_names_hash_bucket_size directive · Issue #114 · nginxinc/kubernetes-ingress · GitHub
![Pointer tagging, linked string hash tables, turbocaching and other Phusion Passenger 5 optimizations Pointer tagging, linked string hash tables, turbocaching and other Phusion Passenger 5 optimizations](https://www.rubyraptor.org/img/hash_table_open_addressing.png)