Slice filter. Splits a request into subrequests, each providing a specific range of response. The variable "$slice_range" must be used to set subrequest range and proper cache key. The directive "slice" sets slice size. The following example splits requests into 1-megabyte cacheable subrequests. server { listen 8000; location / { slice 1m; proxy_cache cache; proxy_cache_key $uri$is_args$args$slice_range; proxy_set_header Range $slice_range; proxy_cache_valid 200 206 1h; proxy_pass http://127.0.0.1:9000; } }