code 206 - visible as '206' in varnishncsa and as '200' from VCL code

Tollef Fog Heen tfheen at
Tue Aug 2 08:57:47 CEST 2011

]] Johnny Halfmoon 


| Well, to my understanding, the way I read out the delivery status is
| already after vcl_deliver has run. The status collection routine is
| called as follows for each backend:
| sub vcl_deliver {
|     C{ STATS_UPDATE(www_somesitename_com) }C
| }
| So at this point all delivery statusses (stati?) should be known to
| Varnish. This setup has been running succesfully for several months
| and it works for all codes except 206. Am I missing something here?

Yes, the decision on whether to return 200 or 206 is done after
vcl_deliver has run.

| 'We' have a setup here where we have about 30 different sites, big and
| small, all running of a cluster of 3 Varnish servers and log and graph
| the returncodes and several other parameters of each site seperately.
| Not having proper registration of the 206 codes does create a hole in
| our logging, but it has not proven to be an issue yet, although we are
| aiming to have this hole closed some time in the near future.

Is there any particular reason why you're not using
varnishlog/varnishncsa for this, rather than potentially slowing down
the object delivery by doing it inline?

Tollef Fog Heen
Varnish Software
t: +47 21 98 92 64

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