nginx的srcache模块

location /src {
    #charset utf-8; # or some other encoding
    default_type text/plain; # or some other MIME type

    set $key $arg_key;
    srcache_fetch GET /get $key;
    srcache_store PUT /set $key;

    # proxy_pass/fastcgi_pass/drizzle_pass/echo/etc...
    # or even static files on the disk
    proxy_pass backrest; 
}
location /get {
    set $memc_cmd get;
    set $memc_key $query_string;
    memc_pass backmem;
}
location /set {
    set $memc_cmd set;
    set $memc_key $query_string;
    memc_pass backmem;
}