Correction of a minor error in the previous message:
# levels=1:1:1 also provides 16^3 = 4096 directories, but in 3 levels
proxy_cache_path /data/nginx/cache levels=1:1:1;
/data/nginx/cache/b/1/5/d7b6e5978e3f042f52e875005925e51b
Posted at Nginx Forum: https://forum.nginx.org/read.php?2,2450,273
Results of queries for the same URL using different settings for
proxy_cache_path "levels"
# levels not specified, so all cache files reside in a single directory
proxy_cache_path /data/nginx/cache;
/data/nginx/cache/d7b6e5978e3f042f52e875005925e51b
# a lot of config examples us
