Question... http://httpd.apache.org/docs/2.4/mod/mod_proxy.html#proxypass
BalancerMember parameter "ping": "Ping property tells the webserver to "test" the connection to the backend before forwarding the request. For AJP, it causes mod_proxy_ajp to send a CPING request on the ajp13 connection (implemented on Tomcat 3.3.2+, 4.1.28+ and 5.0.13+). For HTTP, it causes mod_proxy_http to send a 100-Continue to the backend (only valid for HTTP/1.1 - for non HTTP/1.1 backends, this property has no effect). In both cases, the parameter is the delay in seconds to wait for the reply. This feature has been added to avoid problems with hung and busy backends. This will increase the network traffic during the normal operation which could be an issue, but it will lower the traffic in case some of the cluster nodes are down or busy. By adding a postfix of ms, the delay can be also set in milliseconds." Do we mean 100-Continue? Or was this actually an "OPTIONS * HTTP/1.1" or similar health-check request? 100-Continue isn't really a ping-ack query, it would only be applicable once a request is sent, and ping implies that the health is checked *before* sending the request. --------------------------------------------------------------------- To unsubscribe, e-mail: docs-unsubscr...@httpd.apache.org For additional commands, e-mail: docs-h...@httpd.apache.org
