Hi, 1. You already answer that one: you get a background fetch when obj.ttl <= 0 but obj.ttl + obj.grace > 0.
2. that just hasn't been implemented yet, if I'm not mistaken (that would be the softban feature) -- Guillaume Quintard On Mon, Jul 23, 2018 at 2:16 AM, Serhii Korobov <[email protected]> wrote: > Hi developers of Varnish > > I read information about Varnish 4 release ( https://varnish-cache.org/li > sts/pipermail/varnish-announce/2014-April/000696.html ) and found there a > new feature http://prntscr.com/k8dgfk . I need an information about > refreshing expired cache in background. > > As I know from developer guide, fetching new object in background thread > is available only in Grace Mode - http://book.varnish-software > .com/4.0/chapters/Saving_a_Request.html#grace-mode when object's ttl has > expired but grace period is not over yet. > > Here are my questions: > 1. When and how can I use background cache refreshing? > 2. Why Grace Mode and cache invalidation via "ban" command doesn't work > together? > > Thanks > > > _______________________________________________ > varnish-misc mailing list > [email protected] > https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc > >
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