cache: move open to thread pool

[Maxim Konovalov]

Hi hongzhidao,

The patch wasn't merged as we didn't see much interest and real
technical feedback from potential testers.

The code adds additional complexity to the nginx core with all
associated costs of maintaining the code virtually forever.  In the
same time at this point it brings no measurable value to the
community.  At least, we haven't seen any proofs that it does.

The patch wasn't updated since that but I suspect it could be still
applied to nginx, maybe with some minor tweaks.

Maxim

On 19/07/2019 18:26, 洪志道 wrote:
> Hi.
> Will this patch be merged into the main branch?
> What is the latest patch? We can help with the test.
> Thanks.
> 
> On Sat, Feb 9, 2019 at 6:40 AM Ka-Hing Cheung via nginx-devel
> <nginx-devel at nginx.org <mailto:nginx-devel at nginx.org>> wrote:
> 
>     Unfortunately our test colo is not setup to do performance testing
>     (the traffic it receives varies too much). We do intend to merge
>     this
>     to our production colos but there's no timeline yet.
> 
>     Yuchen (CC'ed) will be the main contact from now on as today is my
>     last day at Cloudflare.
> 
>     - Ka-Hing
> 
>     On Thu, Feb 7, 2019 at 5:39 AM Maxim Konovalov <maxim at nginx.com
>     <mailto:maxim at nginx.com>> wrote:
>     >
>     > Great.  Thanks for the testing!
>     >
>     > Did you see any measurable perf. metrics changes comparing to your
>     > aio open implementation or comparing to nginx without aio open
>     support?
>     >
>     > We are still waiting for additional input from another tester, who
>     > expressed interest before.
>     >
>     > Thanks,
>     >
>     > Maxim
>     >
>     > On 07/02/2019 00:19, Ka-Hing Cheung wrote:
>     > > This has been running in our test colo for the past week
>     with no ill effects.
>     > >
>     > > On Wed, Jan 23, 2019 at 4:39 AM Maxim Konovalov
>     <maxim at nginx.com <mailto:maxim at nginx.com>> wrote:
>     > >>
>     > >> Hi Ka-Hing,
>     > >>
>     > >> Roman told me that the delta is because of your changes.
>     > >>
>     > >> Thanks for your time on that.  Waiting for your testing
>     results.
>     > >>
>     > >> Maxim
>     > >>
>     > >> On 22/01/2019 22:34, Ka-Hing Cheung via nginx-devel wrote:
>     > >>> I spoke too soon, just realized our test colo is running
>     the patches
>     > >>> without aio_open on. Flipping that switch now.
>     > >>>
>     > >>> Also, including the patch that we applied on top in
>     addition to the
>     > >>> massaging we did to resolve conflicts. I haven't dug too
>     deep to see
>     > >>> if stock nginx also requires similar changes or they are only
>     > >>> necessary because of our other nginx changes:
>     > >>>
>     > >> [...]
>     > >>
>     > >> --
>     > >> Maxim Konovalov
>     >
>     >
>     > --
>     > Maxim Konovalov
>     _______________________________________________
>     nginx-devel mailing list
>     nginx-devel at nginx.org <mailto:nginx-devel at nginx.org>
>     http://mailman.nginx.org/mailman/listinfo/nginx-devel
> 
> 
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> 


-- 
Maxim Konovalov