As far as I know, all logical caches with the same affinity function and node filter will end up in the same group. If that's the case, I like the idea. This is exactly what I was looking for.
-Val On Wed, Aug 9, 2017 at 8:18 AM, Evgenii Zhuravlev <e.zhuravlev...@gmail.com> wrote: > Dmitriy, > > Yes, you're right. Moreover, it looks like a good practice to combine > caches that will be used for collocated JOINs in one group since it reduces > overall overhead. > > I think it's not a problem to add this restriction to the SQL JOIN level if > we will decide to use this solution. > > Evgenii > > > > > 2017-08-09 17:07 GMT+03:00 Dmitriy Setrakyan <dsetrak...@apache.org>: > > > On Wed, Aug 9, 2017 at 6:28 AM, ezhuravl <e.zhuravlev...@gmail.com> > wrote: > > > > > Folks, > > > > > > I've started working on a https://issues.apache.org/ > > > jira/browse/IGNITE-5836 > > > ticket and found that the recently added feature with cacheGroups doing > > > pretty much the same that was described in this issue. CacheGroup > > > guarantees > > > that all caches within a group have same assignments since they share a > > > single underlying 'physical' cache. > > > > > > > > I think we can return FairAffinityFunction and add information to its > > > Javadoc that all caches with same AffinityFunction and NodeFilter > should > > be > > > combined in cache group to avoid a problem with inconsistent previous > > > assignments. > > > > > > What do you guys think? > > > > > > > Are you suggesting that we can only reuse the same FairAffinityFunction > > across the logical caches within the same group? This would mean that > > caches from the different groups cannot participate in JOINs or > collocated > > compute. > > > > I think I like the idea, however, we need to make sure that we enforce > this > > restriction, at least at the SQL JOIN level. > > > > Alexey G, Val, would be nice to hear your thoughts on this. > > > > > > > > > > Evgenii > > > > > > > > > > > > -- > > > View this message in context: http://apache-ignite- > > > developers.2346864.n4.nabble.com/Resurrect-FairAffinityFunction- > > > tp19987p20669.html > > > Sent from the Apache Ignite Developers mailing list archive at > > Nabble.com. > > > > > >
