Question about refreshing expired cache in background

[Guillaume Quintard]

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 <greyhomeua at gmail.com>
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
> varnish-misc at varnish-cache.org
> https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://www.varnish-cache.org/lists/pipermail/varnish-misc/attachments/20180723/d72e9f5f/attachment.html>