mån 2007-03-05 klockan 12:43 +0200 skrev Heikki Lampén: > I would like to Squid to serve stale objects if the backend server is > not responding or throws errors. Is there an obvious way to configure > Squid for this that I have missed or what would be the way to go if > not? > > Any version of Squid is ok.
Squid tries to do this, but there is some pitfalls.. Make sure negative_ttl is set to 0 seconds to disable caching of errors. Also if the server as such may be unreachable (not at all responding, not even with a TCP reset) then remember to set the connect timeout sufficiently short. There is three different connect timeouts depending on your config and requirements.. config_timeout, for requests going DIRECT peer_config_timeout, default timeout for requests to a cache_peer cache_peer ... timeout=XXX, specific timeout for this cache peer, overrides peer_config_timeout. Default values is 1 minute for requests going direct and 30 seconds for requests sent to a cache_peer. In most accelerator type setups you want the backend connect timeout quite short, a few seconds. Note: going below 2 seconds is not recommended due to a timing inaccuracy of up to almost a second.. Regards Henrik
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