cache coherence can be a problem, but I am thinking more about what happens when the cache, which is supposed to make things faster, is not available due to error. Django ends up waiting for it. Each request waits for the cache, and this is a hard problem because there is no common shared place to write that the cache is down. However, introducing anything like that introduces problems also with cache coherence.
On Fri, Apr 2, 2021 at 3:17 AM Girish Sontakke <girishsontak...@gmail.com> wrote: > Hello, > If I am not wrong, you are talking about the cache incoherence > <https://en.wikipedia.org/wiki/Cache_coherence> problem. Currently, I > don't have any concrete idea to tackle this problem but I will try to > figure it out. > Thanks for bringing this to concern. > > Kind Regards, > Girish > > On Thursday, April 1, 2021 at 8:39:59 PM UTC+5:30 dans...@gmail.com wrote: > >> Since REDIS is already usable as a cache for Django using 3rd party code, >> I would rather see a circuit breaker pattern applied to the cache, across >> all backends. I'm not that active in maintaining Django right now, but a >> cache may not be fully redundant, and it also can fail. If the cache is >> truly used as a cache, then it should be possible to try the cache, and if >> it fails for several tries, then Django could start to bypass it, and then >> try to re-enable it later. >> >> This is perhaps a bigger effort than a GSOC project - the hard part is >> doing this across multiple processes and threads. What does it mean if the >> cache is only available for some fraction of the instances/processes >> hosting a project? >> >> >> On Thu, Apr 1, 2021 at 8:25 AM Girish Sontakke <girishs...@gmail.com> >> wrote: >> >>> Hello Carlton, >>> As suggested by you I made some revisions to my proposal. Still, it is >>> not a perfect one, I am trying to improve it. Thanks a lot for the help. >>> >>> Kind Regards, >>> Girish >>> On Thursday, April 1, 2021 at 12:15:53 AM UTC+5:30 carlton...@gmail.com >>> wrote: >>> >>>> >>>> >>>> On 31 Mar 2021, at 11:00, Girish Sontakke <girishs...@gmail.com> wrote: >>>> >>>> Now I have doubt that whether I should remove *Provides Many >>>> Data-Structures *point from the "Why Redis" section or keep it there?. >>>> >>>> >>>> I don’t think it’s vital either way… but it seems a distraction. That >>>> Redis has HyperLogLog isn’t something that will matter at all to the cache >>>> backend. >>>> >>>> I’d try to focus on the details of the implementation: Look at the >>>> backend API, set(), get() &co. Look at the two existing third-party >>>> backend, and see what they do there. >>>> >>>> I’d also think about getting the documentation right — there are a few >>>> options with installs and connections and … — you don’t have to solve all >>>> of those in the proposal but showing that you’re aware of them would be >>>> good. >>>> >>>> I hope that helps. >>>> >>>> Kind Regards, >>>> >>>> Carlton >>>> >>>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Django developers (Contributions to Django itself)" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to django-develop...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/django-developers/97c757dd-b09f-49f4-9e3f-0ee4a8e4887cn%40googlegroups.com >>> <https://groups.google.com/d/msgid/django-developers/97c757dd-b09f-49f4-9e3f-0ee4a8e4887cn%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- > You received this message because you are subscribed to the Google Groups > "Django developers (Contributions to Django itself)" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to django-developers+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/django-developers/399dbcd7-7127-4715-b2cd-3f5d349d605bn%40googlegroups.com > <https://groups.google.com/d/msgid/django-developers/399dbcd7-7127-4715-b2cd-3f5d349d605bn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Django developers (Contributions to Django itself)" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-developers+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-developers/CAFzonYbPq07r%2BTr30n30rC87LN9VOmc_0Fu_5bxubEXvgigb0g%40mail.gmail.com.
