how to cache in haproxy code example

Example 1: how to cache in haproxy

global
    nuster cache on data-size 200m
frontend fe
    bind *:8080
    mode http
    default_backend be
backend be
    mode http
    nuster cache on
    nuster rule r1 if { path /a1 }
    nuster rule r2 key method.scheme.host.path.delimiter.query.cookie_userId if { path /a2 }
    nuster rule r3 ttl 10 if { path /a3 }
    nuster rule r4 disk only if { path /a4 }

    server s1 127.0.0.1:8081

Example 2: how to cache in haproxy

global
    nuster cache on data-size 200m
frontend fe
    bind *:8080
    mode http
    default_backend be
backend be
    mode http
    nuster cache on
    nuster rule all
    server s1 127.0.0.1:8081