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Posted to users@trafficserver.apache.org by Mav Peri <ma...@optasports.com> on 2011/09/24 20:55:10 UTC
update cache in background
Hi Guys,
Is it possible to get ATS on stale hit to serve from cache and refresh
the cache in the background?
The use case is when we are experiencing issues with the origin server I
would like to serve stale content (compared to nothing) and then get ats
to refresh it in the background instead of holding traffic up.
Thanks
Mav
RE: update cache in background
Posted by "ming.zym@gmail.com" <mi...@gmail.com>.
I think that TS have something really like the squid done, it will try
to serve stale content as much as possible. if someone would like to
take a deep look at what we can do, may start from
HttpTransact::is_stale_cache_response_returnable(State* s) in
proxy/http/HttpTransact.cc.
Florian Diederichsen is watching on this request too. looks we need to
get it clear.
thanks
在 2011-09-26一的 22:29 +0100，Mav Peri写道：
> Thanks Miles,
>
> Can Bryan provide some info on this and when (and if) there is an ETA on
> this?
>
> If some support can be provided we can help with getting the work done.
>
> Mav
>
> -----Original Message-----
> From: Miles Libbey [mailto:mlibbey@apache.org]
> Sent: 26 September 2011 22:26
> To: users@trafficserver.apache.org
> Subject: Re: update cache in background
>
> They (http://tools.ietf.org/html/rfc5861)
> can be supported by writing a plugin -- I know Yahoo has one, but it
> needs a bit of work to get it out into the project. I think Bryan was
> going to spend some time on doing that.
>
> miles
>
> On Sep 26, 2011, at 12:10 PM, Mav Peri wrote:
>
> > Thanks for the reply
> >
> > So presumably there is no way to do this with ats?
> >
> > From: Nick Berry [mailto:nberry@linkedin.com]
> > Sent: 26 September 2011 19:19
> > To: <us...@trafficserver.apache.org>
> > Subject: Re: update cache in background
> >
> > Sounds like you're interested in stale-while-revalidate [1]. It does
> not appear to be supported in ATS, but is implemented in Squid [2] and
> works quite well.
> >
> > [1] http://www.mnot.net/blog/2007/12/12/stale
> > [2] http://www.squid-cache.org/Doc/config/refresh_pattern/
> >
> > On Sep 24, 2011, at 11:55 AM, Mav Peri wrote:
> >
> >
> > Hi Guys,
> >
> > Is it possible to get ATS on stale hit to serve from cache and refresh
> the cache in the background?
> >
> > The use case is when we are experiencing issues with the origin server
> I would like to serve stale content (compared to nothing) and then get
> ats to refresh it in the background instead of holding traffic up.
> >
> > Thanks
> >
> > Mav
> >
> >
> >
> > ______________________________________________________________________
> > This email has been scanned by the MessageLabs Email Security System.
> > For more information please visit http://www.messagelabs.com/email
> > ______________________________________________________________________
>
>
> ______________________________________________________________________
> This email has been scanned by the MessageLabs Email Security System.
> For more information please visit http://www.messagelabs.com/email
> ______________________________________________________________________
RE: update cache in background
Posted by Mav Peri <ma...@optasports.com>.
Thanks Miles,
Can Bryan provide some info on this and when (and if) there is an ETA on
this?
If some support can be provided we can help with getting the work done.
Mav
-----Original Message-----
From: Miles Libbey [mailto:mlibbey@apache.org]
Sent: 26 September 2011 22:26
To: users@trafficserver.apache.org
Subject: Re: update cache in background
They (http://tools.ietf.org/html/rfc5861)
can be supported by writing a plugin -- I know Yahoo has one, but it
needs a bit of work to get it out into the project. I think Bryan was
going to spend some time on doing that.
miles
On Sep 26, 2011, at 12:10 PM, Mav Peri wrote:
> Thanks for the reply
>
> So presumably there is no way to do this with ats?
>
> From: Nick Berry [mailto:nberry@linkedin.com]
> Sent: 26 September 2011 19:19
> To: <us...@trafficserver.apache.org>
> Subject: Re: update cache in background
>
> Sounds like you're interested in stale-while-revalidate [1]. It does
not appear to be supported in ATS, but is implemented in Squid [2] and
works quite well.
>
> [1] http://www.mnot.net/blog/2007/12/12/stale
> [2] http://www.squid-cache.org/Doc/config/refresh_pattern/
>
> On Sep 24, 2011, at 11:55 AM, Mav Peri wrote:
>
>
> Hi Guys,
>
> Is it possible to get ATS on stale hit to serve from cache and refresh
the cache in the background?
>
> The use case is when we are experiencing issues with the origin server
I would like to serve stale content (compared to nothing) and then get
ats to refresh it in the background instead of holding traffic up.
>
> Thanks
>
> Mav
>
>
>
> ______________________________________________________________________
> This email has been scanned by the MessageLabs Email Security System.
> For more information please visit http://www.messagelabs.com/email
> ______________________________________________________________________
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please visit http://www.messagelabs.com/email
______________________________________________________________________
Re: update cache in background
Posted by Miles Libbey <ml...@apache.org>.
They (http://tools.ietf.org/html/rfc5861)
can be supported by writing a plugin -- I know Yahoo has one, but it
needs a bit of work to get it out into the project. I think Bryan was
going to spend some time on doing that.
miles
On Sep 26, 2011, at 12:10 PM, Mav Peri wrote:
> Thanks for the reply
>
> So presumably there is no way to do this with ats?
>
> From: Nick Berry [mailto:nberry@linkedin.com]
> Sent: 26 September 2011 19:19
> To: <us...@trafficserver.apache.org>
> Subject: Re: update cache in background
>
> Sounds like you're interested in stale-while-revalidate [1]. It does not appear to be supported in ATS, but is implemented in Squid [2] and works quite well.
>
> [1] http://www.mnot.net/blog/2007/12/12/stale
> [2] http://www.squid-cache.org/Doc/config/refresh_pattern/
>
> On Sep 24, 2011, at 11:55 AM, Mav Peri wrote:
>
>
> Hi Guys,
>
> Is it possible to get ATS on stale hit to serve from cache and refresh the cache in the background?
>
> The use case is when we are experiencing issues with the origin server I would like to serve stale content (compared to nothing) and then get ats to refresh it in the background instead of holding traffic up.
>
> Thanks
>
> Mav
>
>
>
> ______________________________________________________________________
> This email has been scanned by the MessageLabs Email Security System.
> For more information please visit http://www.messagelabs.com/email
> ______________________________________________________________________
FW: update cache in background
Posted by Mav Peri <ma...@optasports.com>.
Thanks for the reply
So presumably there is no way to do this with ats?
From: Nick Berry [mailto:nberry@linkedin.com]
Sent: 26 September 2011 19:19
To: <us...@trafficserver.apache.org>
Subject: Re: update cache in background
Sounds like you're interested in stale-while-revalidate [1]. It does
not appear to be supported in ATS, but is implemented in Squid [2] and
works quite well.
[1] http://www.mnot.net/blog/2007/12/12/stale
[2] http://www.squid-cache.org/Doc/config/refresh_pattern/
On Sep 24, 2011, at 11:55 AM, Mav Peri wrote:
Hi Guys,
Is it possible to get ATS on stale hit to serve from cache and refresh
the cache in the background?
The use case is when we are experiencing issues with the origin server I
would like to serve stale content (compared to nothing) and then get ats
to refresh it in the background instead of holding traffic up.
Thanks
Mav
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please visit http://www.messagelabs.com/email
______________________________________________________________________
Re: update cache in background
Posted by Nick Berry <nb...@linkedin.com>.
Sounds like you're interested in stale-while-revalidate [1]. It does not appear to be supported in ATS, but is implemented in Squid [2] and works quite well.
[1] http://www.mnot.net/blog/2007/12/12/stale
[2] http://www.squid-cache.org/Doc/config/refresh_pattern/
On Sep 24, 2011, at 11:55 AM, Mav Peri wrote:
Hi Guys,
Is it possible to get ATS on stale hit to serve from cache and refresh the cache in the background?
The use case is when we are experiencing issues with the origin server I would like to serve stale content (compared to nothing) and then get ats to refresh it in the background instead of holding traffic up.
Thanks
Mav