> 在 2017年4月15日，下午12:00，Jacky Li <jacky.li...@qq.com> 写道： > > Hi Cao Lu, > > The overall design likes good to me, I just have following points need to > confirm: > 1. Is there detele partition DDL? > 2. For the data loading part, it needs to do global shuffle before actual > data loading? And the partition key should not be included in SORT_COLUMNS > option, right? If yes, I think it is better to put this constrain in the > document also.
After second thought, I think it is up to the user whether to put partition key in the SORT_COLUMNS. There should be no constrain. > 3. For the query part, I suggest to add more description for index, like how > B tree will be loaded into driver and many B tree will be there? > 4. As a further optimization, is it possible that we map the partition to > DataNode such that we do not need to communicate with NameNode for every > query? Can this mapping be considered like a cache? > > Regards, > Jacky > > > -- > View this message in context: > http://apache-carbondata-mailing-list-archive.1130556.n5.nabble.com/Discussion-Implement-Partition-Table-Feature-tp10938p11063.html > Sent from the Apache CarbonData Mailing List archive mailing list archive at > Nabble.com.
