> > I once heard a quote.. "I had a performance problem, so I added caching. > now I have two performance problems." > this. 1,000 times this.
Just to float this thought ... make sure it's considered... I've seen a *lot* of people misuse caching when what the really want is memoization. * http://stackoverflow.com/questions/1988804/what-is-memoization-and-how-can-i-use-it-in-python * http://stackoverflow.com/questions/10879137/how-can-i-memoize-a-class-instantiation-in-python ... I'm not sure what you're trying to do. So YMMV, TTFN, BBQ. # Shawn Hartsock ----- Original Message ----- > From: "Clint Byrum" <cl...@fewbar.com> > To: "openstack-dev" <openstack-dev@lists.openstack.org> > Sent: Monday, October 28, 2013 12:12:49 PM > Subject: Re: [openstack-dev] distibuted caching system in front of mysql > server for openstack transactions > > Excerpts from Dolph Mathews's message of 2013-10-28 08:40:19 -0700: > > It's not specific to mysql (or sql at all), but keystone is using > > dogpile.cache around driver calls to a similar effect. > > > > http://dogpilecache.readthedocs.org/en/latest/ > > > > It can persist to memcache, redis, etc. > > > > I once heard a quote.. "I had a performance problem, so I added caching. > now I have two performance problems." > > Caching is unbelievably awesome in the jobs it can do well. When the > problem is straight forward and the requirements are few, it is just the > right thing to relieve engineering pressure to make an application more > scalable. > > However, IMO, more than narrow, well defined cache usage is a sign > that the application needs some reworking to scale. > > I like the principle of "let's use dogpile so we don't have to reinvent > multi-level caching". However, let's make sure we look at each > performance issue individually, rather than just throwing them all in > a cache box and waving the memcache wand. > > > > > https://github.com/openstack/keystone/blob/master/keystone/common/cache/core.py > > > > On Fri, Oct 25, 2013 at 6:53 PM, Qing He <qing...@radisys.com> wrote: > > > > > All,**** > > > > > > Has anyone looked at the options of putting a distributed caching system > > > in front of mysql server to improve performance? This should be similar > > > to > > > Oracle Coherence, or VMware VFabric SQLFire.**** > > > > > > ** ** > > > > > > Thanks,**** > > > > > > ** ** > > > > > > Qing**** > > > > > > _______________________________________________ > > > OpenStack-dev mailing list > > > OpenStack-dev@lists.openstack.org > > > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > > > > > > > > > > _______________________________________________ > OpenStack-dev mailing list > OpenStack-dev@lists.openstack.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > _______________________________________________ OpenStack-dev mailing list OpenStack-dev@lists.openstack.org http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev