Thanks Dridi. I had switched to just marking the content uncacheable and using 
return(deliver), per the new v4 method, temporarily. I wasn’t sure if there was 
any advantage to using pipe anymore for files ranging from ~10MB - 500MB in 
size on the server?

Jason

> On Apr 17, 2015, at 2:58 AM, Dridi Boukelmoune <[email protected]> wrote:
> 
> Why pipe when you could simply have a hit-for-pass object?
> 
> In vcl_backend_response you could simply set beresp.uncacheable to
> true (return(pass) in vcl_fetch for v3). With such a config you'd hit
> your backend twice for all responses of more than 10MB.
> 
> Dridi
> 
> On Thu, Apr 16, 2015 at 6:05 PM, Jason Heffner <[email protected]> wrote:
>> I’m working on updating our Varnish 3 config to Varnish 4 and I was able to 
>> figure out how to have the same functionality for almost all of the config. 
>> I wanted to find opinions on how to handle large files. We don’t want to 
>> cache any large files and had this in place for varnish 3. I’ve read 
>> streaming instead of piping was a solution but found nothing to determine 
>> this based solely on file size from the backend.
>> 
>> # Varnish 3 config
>> added to vcl_recv:
>>  /* Bypass cache for large files.  The x-pipe header is
>>     set in vcl_fetch when a too large file is detected. */
>>  if (req.http.x-pipe && req.restarts > 0) {
>>    remove req.http.x-pipe;
>>    return (pipe);
>>  }
>> 
>> added to vcl_fetch:
>>  # don't cache files larger than 10MB
>>  /* Don't try to cache too large files.  It appears
>>     Varnish just crashes if we don't filter them. */
>>  if (beresp.http.Content-Length ~ "[0-9]{8,}" ) {
>>    set req.http.x-pipe = "1";
>>    return (restart);
>>  }
>> 
>> Since req.* is no longer available in vcl_recv this code doesn’t function 
>> anymore.
>> 
>> Thanks,
>> Jason
>> _______________________________________________
>> varnish-misc mailing list
>> [email protected]
>> https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc


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