Why not? Obviously compression would have to be enabled per group, not per cache.
D. On Sep 29, 2017, 10:50 PM, at 10:50 PM, Vladimir Ozerov <[email protected]> wrote: >And it will continue hitting us in future. For example, when data >compression is implemented, for logical caches compression rate will be >poor, as it would be impossbile to build efficient dictionaries in >mixed >data pages. > >On Sat, Sep 30, 2017 at 8:48 AM, Vladimir Ozerov <[email protected]> >wrote: > >> Folks, >> >> Honesly, to me logical caches appears to be a dirty shortcut to >mitigate >> some inefficient internal implementation. Why can't we merge >partition maps >> in runtime? This should not be a problem for context-independent >affinity >> functions (e.g. RendezvousAffinityFunction). From user perspective >logic >> caches feature is: >> 1) Bad API. One cannot define group configuration. All you can do is >to >> define group name on cache lavel and hope that nobody started another >cache >> in the same group with different configuration before. >> 2) Performance impact for scans, as you have to iterate over mixed >data. >> >> Couldn't we fix partition map problem without cache groups? >> >> On Sat, Sep 30, 2017 at 2:35 AM, Denis Magda <[email protected]> >wrote: >> >>> Guys, >>> >>> Another question. Does this capability enabled by default? If yes, >how do >>> we decide which group a cache goes to? >>> >>> — >>> Denis >>> >>> > On Sep 29, 2017, at 3:58 PM, Denis Magda <[email protected]> >wrote: >>> > >>> > Igniters, >>> > >>> > I’ve put on paper the feature from the subj: >>> > https://apacheignite.readme.io/docs/logical-caches < >>> https://apacheignite.readme.io/docs/logical-caches> >>> > >>> > Sam, will appreciate if you read through it and confirm I >explained the >>> topic 100% technically correct. >>> > >>> > However, are there any negative impacts of having logical caches? >This >>> page has “Possible Impacts” section unfilled: >>> > https://cwiki.apache.org/confluence/display/IGNITE/Logical+Caches >< >>> https://cwiki.apache.org/confluence/display/IGNITE/Logical+Caches> >>> > >>> > — >>> > Denis >>> >>> >>
