Stale while revalidate in Varnish

[Arun Dobriyal]

Hi,

 I want a state-while-revalidate feature(available in some reverse proxies
like squid) for my varnish server.  In a normal setting with the grace
time, the varnish

makes the first client to wait while the other clients are served stale
content. But I want all users to be served stale

content, while the refereshing of the cache is done at the background
asychronously (that way no one is kept at waiting) by varnish.

Is somehow this possible in varnish ?

Thanks
AD
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