Re: Is there ready functionality for disabling caching of particular objects
(And there are close examples on that page: https://docs.trafficserver.apache.org/en/latest/admin-guide/plugins/header_rewrite.en.html#check-for-existence-of-a-header and https://docs.trafficserver.apache.org/en/latest/admin-guide/plugins/header_rewrite.en.html#add-cache-control-headers-based-on-origin-path On Mon, Apr 22, 2024 at 7:49 AM dave seddon wrote: > I guess you could rewrite the headers > > https://docs.trafficserver.apache.org/en/latest/admin-guide/plugins/header_rewrite.en.html > > On Mon, Apr 22, 2024 at 7:31 AM Pavel Vazharov wrote: > >> Thank you for the response. >> >> Unfortunately we don't have control over the upstream http servers in >> this case. >> We need to make sure that we don't cache particular objects while working >> as a forward proxy. >> I think, I can write a C++ plugin for this. I was just trying to find if >> there is a ready solution before writing our own. >> >> On Mon, Apr 22, 2024 at 5:26 PM dave seddon >> wrote: >> >>> The "cleanest" way is for the upstream http server to add cache control >>> headers >>> >>> https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control >>> >>> On Mon, Apr 22, 2024, 07:22 Pavel Vazharov wrote: >>> Hi there, Is there existing ATS functionality or plugin through which can be disabled caching of particular objects by URL or regex? Thanks, Pavel. >>> > > -- > Regards, > Dave Seddon > +1 415 857 5102 >
Re: Notification when objects are removed from the cache (disk storage)
I see. Thank you. On Mon, Apr 22, 2024 at 6:32 PM Leif Hedstrom wrote: > There isn’t. However, you can see how often the disks are churned (via > metrics), which at least gives you an estimate of how long objects are > staying in the cache. If the disks wraps once a week, objects are likely to > stay in the cache for a week. > > — Leif > > > On Apr 22, 2024, at 07:00, Pavel Vazharov wrote: > > > > > > Hi there, > > > > Is there a way to write a plugin which can receive notifications when > objects are removed from the cache (disk storage) during the moves of the > "write head"? > > I'm asking this because we have a need to track the lifetime of the > objects in the disk storage and "know" when a given object is no longer > available in the disk cache. > > > > Regards, > > Pavel. >
Re: Is there ready functionality for disabling caching of particular objects
On Mon, Apr 22, 2024 at 6:26 PM Nuno Vargas wrote: > Hi, > > > > You can use cache.config: > > url_regex=something action=never-cache > > > > > https://docs.trafficserver.apache.org/admin-guide/files/cache.config.en.html > Thank you. Will look into it. > > Regards, > > Nuno V. > > > > *From:* dave seddon > *Sent:* 22 de abril de 2024 15:46 > *To:* users@trafficserver.apache.org > *Subject:* Re: Is there ready functionality for disabling caching of > particular objects > > > > > *CAUTION:* This email was originated from outside NOS organization. Do > not click links or open attachments unless you recognize the sender and > know the content is safe. > > > > I guess you could rewrite the headers > > > https://docs.trafficserver.apache.org/en/latest/admin-guide/plugins/header_rewrite.en.html > > > > On Mon, Apr 22, 2024 at 7:31 AM Pavel Vazharov wrote: > > Thank you for the response. > > Unfortunately we don't have control over the upstream http servers in this > case. > > We need to make sure that we don't cache particular objects while working > as a forward proxy. > > I think, I can write a C++ plugin for this. I was just trying to find if > there is a ready solution before writing our own. > > > > On Mon, Apr 22, 2024 at 5:26 PM dave seddon > wrote: > > The "cleanest" way is for the upstream http server to add cache control > headers > > > > https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control > > > > On Mon, Apr 22, 2024, 07:22 Pavel Vazharov wrote: > > Hi there, > > Is there existing ATS functionality or plugin through which can be > disabled caching of particular objects by URL or regex? > > Thanks, > > Pavel. > > > > -- > > Regards, > > Dave Seddon > +1 415 857 5102 >
Re: Notification when objects are removed from the cache (disk storage)
There isn’t. However, you can see how often the disks are churned (via metrics), which at least gives you an estimate of how long objects are staying in the cache. If the disks wraps once a week, objects are likely to stay in the cache for a week. — Leif > On Apr 22, 2024, at 07:00, Pavel Vazharov wrote: > > > Hi there, > > Is there a way to write a plugin which can receive notifications when objects > are removed from the cache (disk storage) during the moves of the "write > head"? > I'm asking this because we have a need to track the lifetime of the objects > in the disk storage and "know" when a given object is no longer available in > the disk cache. > > Regards, > Pavel.
RE: Is there ready functionality for disabling caching of particular objects
Hi, You can use cache.config: url_regex=something action=never-cache https://docs.trafficserver.apache.org/admin-guide/files/cache.config.en.html Regards, Nuno V. From: dave seddon Sent: 22 de abril de 2024 15:46 To: users@trafficserver.apache.org Subject: Re: Is there ready functionality for disabling caching of particular objects CAUTION: This email was originated from outside NOS organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. I guess you could rewrite the headers https://docs.trafficserver.apache.org/en/latest/admin-guide/plugins/header_rewrite.en.html On Mon, Apr 22, 2024 at 7:31 AM Pavel Vazharov mailto:pa...@x3me.net>> wrote: Thank you for the response. Unfortunately we don't have control over the upstream http servers in this case. We need to make sure that we don't cache particular objects while working as a forward proxy. I think, I can write a C++ plugin for this. I was just trying to find if there is a ready solution before writing our own. On Mon, Apr 22, 2024 at 5:26 PM dave seddon mailto:dave.seddon...@gmail.com>> wrote: The "cleanest" way is for the upstream http server to add cache control headers https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control On Mon, Apr 22, 2024, 07:22 Pavel Vazharov mailto:pa...@x3me.net>> wrote: Hi there, Is there existing ATS functionality or plugin through which can be disabled caching of particular objects by URL or regex? Thanks, Pavel. -- Regards, Dave Seddon +1 415 857 5102
Re: Is there ready functionality for disabling caching of particular objects
Yes, this seems like an option. I need to think more about it. Thank you for the idea. On Mon, Apr 22, 2024 at 5:50 PM dave seddon wrote: > I guess you could rewrite the headers > > https://docs.trafficserver.apache.org/en/latest/admin-guide/plugins/header_rewrite.en.html > > On Mon, Apr 22, 2024 at 7:31 AM Pavel Vazharov wrote: > >> Thank you for the response. >> >> Unfortunately we don't have control over the upstream http servers in >> this case. >> We need to make sure that we don't cache particular objects while working >> as a forward proxy. >> I think, I can write a C++ plugin for this. I was just trying to find if >> there is a ready solution before writing our own. >> >> On Mon, Apr 22, 2024 at 5:26 PM dave seddon >> wrote: >> >>> The "cleanest" way is for the upstream http server to add cache control >>> headers >>> >>> https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control >>> >>> On Mon, Apr 22, 2024, 07:22 Pavel Vazharov wrote: >>> Hi there, Is there existing ATS functionality or plugin through which can be disabled caching of particular objects by URL or regex? Thanks, Pavel. >>> > > -- > Regards, > Dave Seddon > +1 415 857 5102 >
Re: Is there ready functionality for disabling caching of particular objects
I guess you could rewrite the headers https://docs.trafficserver.apache.org/en/latest/admin-guide/plugins/header_rewrite.en.html On Mon, Apr 22, 2024 at 7:31 AM Pavel Vazharov wrote: > Thank you for the response. > > Unfortunately we don't have control over the upstream http servers in this > case. > We need to make sure that we don't cache particular objects while working > as a forward proxy. > I think, I can write a C++ plugin for this. I was just trying to find if > there is a ready solution before writing our own. > > On Mon, Apr 22, 2024 at 5:26 PM dave seddon > wrote: > >> The "cleanest" way is for the upstream http server to add cache control >> headers >> >> https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control >> >> On Mon, Apr 22, 2024, 07:22 Pavel Vazharov wrote: >> >>> Hi there, >>> >>> Is there existing ATS functionality or plugin through which can be >>> disabled caching of particular objects by URL or regex? >>> >>> Thanks, >>> Pavel. >>> >> -- Regards, Dave Seddon +1 415 857 5102
Re: Is there ready functionality for disabling caching of particular objects
Thank you for the response. Unfortunately we don't have control over the upstream http servers in this case. We need to make sure that we don't cache particular objects while working as a forward proxy. I think, I can write a C++ plugin for this. I was just trying to find if there is a ready solution before writing our own. On Mon, Apr 22, 2024 at 5:26 PM dave seddon wrote: > The "cleanest" way is for the upstream http server to add cache control > headers > > https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control > > On Mon, Apr 22, 2024, 07:22 Pavel Vazharov wrote: > >> Hi there, >> >> Is there existing ATS functionality or plugin through which can be >> disabled caching of particular objects by URL or regex? >> >> Thanks, >> Pavel. >> >
Re: Is there ready functionality for disabling caching of particular objects
The "cleanest" way is for the upstream http server to add cache control headers https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control On Mon, Apr 22, 2024, 07:22 Pavel Vazharov wrote: > Hi there, > > Is there existing ATS functionality or plugin through which can be > disabled caching of particular objects by URL or regex? > > Thanks, > Pavel. >
Is there ready functionality for disabling caching of particular objects
Hi there, Is there existing ATS functionality or plugin through which can be disabled caching of particular objects by URL or regex? Thanks, Pavel.
Notification when objects are removed from the cache (disk storage)
Hi there, Is there a way to write a plugin which can receive notifications when objects are removed from the cache (disk storage) during the moves of the "write head"? I'm asking this because we have a need to track the lifetime of the objects in the disk storage and "know" when a given object is no longer available in the disk cache. Regards, Pavel.
