[Research] django high availability

- high availability

https://n3tc4t.github.io/blog/simple-dbha-for-django-app

https://www.slideshare.net/fdintino/high-availability-django-djangocon-2016

profiling(성능분석):

• Hosted services: New Relic, Opbeat 

• django-debug-toolbar, django-silk 

• cProfile / pyprof2calltree / KCacheGrind for masochists 

• WSGI middleware

monitoring(모니터링)

• Downtime notifications: Alertra, New Relic, Opbeat, Chartbeat 

• Nagios and its many forks, Zabbix

Caching 

• Use a CDN 

• Proxy cache (Nginx, Squid, Varnish) 

• {% cache %}, @cached_property, CachedStaticFilesStorage, cached template loader 

• Page caching frameworks 

• ORM caching: a mixed bag

Query optimization 

• .prefetch_related(), .select_related() 

• prefetch_related_objects() for generic foreign keys

• .values() and .values_list() where it counts, if possible 

• Database parameter tuning, judicious indexing

uWSGI 

• Broad and active community  (넓고 활성화된 커뮤니티)

• Very thorough documentation (overwhelming, in fact) (친절한문서)

• Highly configurable (설정이다양함)