Cache file on ZFS volume or raw block device

[Per Buer]

hi,

On Sun, Apr 14, 2013 at 5:33 AM, Leif Pedersen <bilbo at hobbiton.org> wrote:

> What do you guys think? Am I wasting my time, or is it worth the effort to
> avoid some filesystem overhead for cache IO? I thought that perhaps
> allowing the storage to be a raw block device might also be useful for some
> people (maybe my future self) who want to put it on a dedicated SSD.
>

We tried disabling those checks and running Varnish on raw Linux IO devices
a couple of years back. Not completely raw IO devices but those that still
keep the page cache active. The results where rather disappointing with a
significant reduction in performance. I guess the
more aggressive preemptive caching in the filesystem help out a bit more.

It is not a costly experiment to conduct. Go for it. The VM your playing
with is a totally different one.

-- 
 <http://www.varnish-software.com/> *Per Buer*
CEO | Varnish Software AS
Phone: +47 958 39 117 | Skype: per.buer
We Make Websites Fly!
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://www.varnish-cache.org/lists/pipermail/varnish-dev/attachments/20130415/42cfc093/attachment.html>