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From "Patrick O'Brien" <patrickobr...@tetrisblocks.net>
Subject Re: collapsed forwarding still leaking to origin
Date Thu, 18 Jun 2020 14:02:12 GMT
Can confirm that we are also seeing this, but only at times of extremely
high traffic (e.g. 20Gbps).

On Thu, Jun 18, 2020 at 5:57 AM ezko <erez.koler@harmonicinc.com> wrote:

> Hi,
> we are evaluating ATS 8.0.7 as reverse proxy for caching linear video
> (multiple instantaneous hits for the same content).
> we enabled RWW and collapsed forwarding as described in the docs.
> it works really well , but sometimes we see leaks to the origin.
> when leaking happens , we are seeing 303 with Cache Result Code =
> ERR_CONNECT_FAIL
>
> Our first priority is to protect the origin (because it fails when
> flooded).
> when using RWW + ColFw , what is the recommended config to best protect the
> origin ?
>
> BR,
> Erez
>
> Our config:
> proxy.config.http.cache.open_write_fail_action 4
> proxy.config.cache.enable_read_while_writer 1
> proxy.config.http.redirection_enabled 1
> proxy.config.http.number_of_redirections 10
> proxy.config.http.redirect_use_orig_cache_key 1
> proxy.config.http.background_fill_active_timeout 0
> proxy.config.http.background_fill_completed_threshold 0
> proxy.config.cache.max_doc_size 0
> proxy.config.cache.read_while_writer.max_retries 10
> proxy.config.cache.read_while_writer_retry.delay 50
> proxy.config.http.cache.max_open_read_retries 5
> proxy.config.http.cache.open_read_retry_time 10
> proxy.config.http.wait_for_cache 1
>
> and we also tried changing this one:
> proxy.config.http.cache.max_open_write_retries 50
>
> remap:
> @plugin=collapsed_forwarding.so @pparam=--delay=40 @pparam=--retries=5
>
>
>
> --
> Sent from: http://apache-traffic-server.24303.n7.nabble.com/
>

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