does varnish write objects to disk?

[Poul-Henning Kamp]

In message <45ABC845.8010202 at partyticket.net>, Flemming Frandsen writes:
>Poul-Henning Kamp wrote:
>>>Varnish caches objects into *memory* and not disk right?
>> 
>> No, varnish caches objects into "virtual memory" which means that
>> RAM acts as a cache for the disk.
>
>I guess the interesting detail is how eager the kernel is to write the 
>mapped memory to disk.
>
>It would be a shame to spend time and IO bandwidth to write a 1G cache 
>out to disk if the box has 4G of RAM and would never need the RAM for 
>anything other than the cache, woudn't it?

The kernels I know of can be described as distinctively reluctant
to write things out.

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Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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