ATS(apache traffic server)预缓存功能需要设置2个参数后才能启用:
1. proxy.config.http.background_fill_active_timeout
针对小文件可以设置为默认: INT 60
针对大文件可以设置为: INT 3600
具体可以根据文件大小和网络速度来决定
2. proxy.config.http.background_fill_completed_threshold
设置为0.0就好,默认是0.5
具体解释可以看官方说明:
http://trafficserver.apache.org/docs/trunk/admin/configuration-files/records.config.en.html
proxy.config.http.background_fill_active_timeout
INT
Default: 60
Specifies how long Traffic Server continues a background fill before giving up and dropping the origin server connection.
proxy.config.http.background_fill_completed_threshold
FLOAT
Default: 0.50000
The proportion of total document size already transferred when a client aborts at which the proxy continues fetching the document from the origin server to get it into the cache (a background fill).
Origin Server Connect Attempts