VCL program naming
I have never been quite happy with the current namespace for vcl programs and the recent work on management tools have shown that it is indeed not very practical. Having pondered the question, I have come up with the following idea instead: we add version numbers to the names of loaded VCLs, and allow CLI commands to optionally be specify them. Here is a mockup to show how it works: $ varnishd -f myvcl.vcl -d -d ... [...] vcl.list 200 # active 21 boot:12008-12-04 10:03:06 UTC -f myvcl.vcl # The -b or -f argument, always turns into a VCL named boot # Notice the :1 version number. vcl.load test myvcl2.vcl 200 # vcl.list 200 # active 34 boot:12008-12-04 10:03:06 UTC -f myvcl.vcl -0 test:12008-12-04 10:07:16 UTC myvcl2.vcl by stdin # we have loaded the test vcl, it gets version 1 as well. # VCLs do not get activated automatically. vcl.use test 200 # vcl.list 200 # - 34 boot:12008-12-04 10:03:06 UTC -f myvcl.vcl active 3 test:12008-12-04 10:07:16 UTC myvcl2.vcl by stdin # Now we are running the test vcl vcl.load boot myvcl.vcl 200 # vcl.list 200 # - 14 boot.12008-12-04 10:03:06 UTC -f myvcl.vcl -0 boot:22008-12-04 10:08:34 UTC myvcl.vcl by stdin active 13 test:12008-12-04 10:07:16 UTC myvcl2.vcl by stdin # we have loaded another boot vcl and it gets version # number two. vcl.use boot 200 # vcl.list 200 # - 08 boot.12008-12-04 10:03:06 UTC -f myvcl.vcl active 12 boot:22008-12-04 10:08:34 UTC myvcl.vcl by stdin - 12 test:12008-12-04 10:07:16 UTC myvcl2.vcl by stdin # If no version is specified, the highst version number # is assumed. vcl.discard test 200 # vcl.list 200 # active 22 boot.12008-12-04 10:03:06 UTC -f myvcl.vcl -6 boot:22008-12-04 10:08:34 UTC myvcl.vcl by stdin # Discard without version number removes all non-active VCLs # of that # name. vcl.load boot myvcl.vcl 200 # vcl.list 200 # active 22 boot.12008-12-04 10:03:06 UTC -f myvcl.vcl -6 boot:22008-12-04 10:08:34 UTC myvcl.vcl by stdin -0 boot:32008-12-04 10:10:51 UTC myvcl.vcl by stdin # Another version of the boot vcl vcl.use boot:2 200 # vcl.list 200 # - 18 boot.12008-12-04 10:03:06 UTC -f myvcl.vcl active 15 boot:22008-12-04 10:08:34 UTC myvcl.vcl by stdin -0 boot:32008-12-04 10:10:51 UTC myvcl.vcl by stdin # We can say which exact version we want vcl.discard boot 200 # vcl.list 200 # active 15 boot:22008-12-04 10:08:34 UTC myvcl.vcl by stdin # And discard without version purges all non-active versions, # even if they are higher version numbers than the active. vcl.list -d 200 # discard 7 boot.12008-12-04 10:03:06 UTC -f myvcl.vcl active 23 boot:22008-12-04 10:08:34 UTC myvcl.vcl by stdin discard 2 test:12008-12-04 10:07:16 UTC myvcl2.vcl by stdin # the -d option also shows discarded VCLs that are still not # cleaned up, because sessions still reference them. Input comments welcome! Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ varnish-misc mailing list varnish-misc@projects.linpro.no http://projects.linpro.no/mailman/listinfo/varnish-misc
Re: Varnish Serves only uncompressed objects if they are requested first
Our app servers are sending the Vary on the Accept-Encoding when
compression is requested. If compression is not requested they do not
perform the Vary. Does that mean we should find a way to send a Vary:
Accept-Encoding: null,gzip,deflate or something? Is there a 'no
compression' accept-encoding header?
On Dec 2, 2008, at 10:36 PM, Per Buer wrote:
Jeff Anderson skrev:
It looks like if the first requested page is for an uncompressed page
varnish will only deliver the uncompressed page from cache even if a
compressed page is requested.
As long as you don't Vary: on the Accept-Encoding I guess that is
expected. Varnish doesn't not understand the Accept-Encoding header.
(..)
What could be causing this? The only way to fix appears to be to add
the lines below:
sub vcl_hash {
if (req.http.Accept-Encoding ~ gzip || req.http.Accept-Encoding ~
deflate) {
set req.hash += req.http.Accept-Encoding;
}
Either use the fix you suggested or add a Vary: Accept-Encoding on the
backend.
--
Per Buer - Leder Infrastruktur og Drift - Redpill Linpro
Telefon: 21 54 41 21 - Mobil: 958 39 117
http://linpro.no/ | http://redpill.se/
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Re: [varnish] Re: Varnish Serves only uncompressed objects if they are requested first
Your app server should set the Vary on *all* responses if *any*
response can vary.
Ric
On Dec 4, 2008, at 11:59 AM, Jeff Anderson wrote:
Our app servers are sending the Vary on the Accept-Encoding when
compression is requested. If compression is not requested they do not
perform the Vary. Does that mean we should find a way to send a Vary:
Accept-Encoding: null,gzip,deflate or something? Is there a 'no
compression' accept-encoding header?
On Dec 2, 2008, at 10:36 PM, Per Buer wrote:
Jeff Anderson skrev:
It looks like if the first requested page is for an uncompressed
page
varnish will only deliver the uncompressed page from cache even if a
compressed page is requested.
As long as you don't Vary: on the Accept-Encoding I guess that is
expected. Varnish doesn't not understand the Accept-Encoding header.
(..)
What could be causing this? The only way to fix appears to be to
add
the lines below:
sub vcl_hash {
if (req.http.Accept-Encoding ~ gzip || req.http.Accept-Encoding ~
deflate) {
set req.hash += req.http.Accept-Encoding;
}
Either use the fix you suggested or add a Vary: Accept-Encoding on
the
backend.
--
Per Buer - Leder Infrastruktur og Drift - Redpill Linpro
Telefon: 21 54 41 21 - Mobil: 958 39 117
http://linpro.no/ | http://redpill.se/
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varnish-misc@projects.linpro.no
http://projects.linpro.no/mailman/listinfo/varnish-misc
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