NAME

       CURLOPT_DNS_CACHE_TIMEOUT - set life-time for DNS cache entries

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_CACHE_TIMEOUT, long age);

DESCRIPTION

       Pass  a  long,  this  sets the timeout in seconds. Name resolves will be kept in memory and used for this
       number of seconds. Set to zero to completely disable caching, or set to -1 to  make  the  cached  entries
       remain forever. By default, libcurl caches this info for 60 seconds.

       The  name  resolve functions of various libc implementations don't re-read name server information unless
       explicitly told so (for example, by calling res_init(3)). This may cause libcurl to keep using the  older
       server  even  if DHCP has updated the server info, and this may look like a DNS cache issue to the casual
       libcurl-app user.

       Note that DNS entries have a "TTL" property but libcurl doesn't use  that.  This  DNS  cache  timeout  is
       entirely speculative that a name will resolve to the same address for a certain small amount of time into
       the future.

DEFAULT

       60

PROTOCOLS

       All

EXAMPLE

       TODO

AVAILABILITY

       Always

RETURN VALUE

       Returns CURLE_OK

SEE ALSO

       CURLOPT_DNS_USE_GLOBAL_CACHE(3), CURLOPT_DNS_SERVERS(3),

libcurl 7.37.0                                     17 Jun 2014                      CURLOPT_DNS_CACHE_TIMEOUT(3)