[GitHub] [incubator-doris] kangpinghuang opened a new issue #2245: support online upgrade from alpha rowset to beta rowset

[GitBox <gi...@apache.org>]

kangpinghuang opened a new issue #2245: support online upgrade from alpha rowset to beta rowset
URL: https://github.com/apache/incubator-doris/issues/2245
 
 
   In order to support dictionary encoding and bitmap index, we develop new file storage format: segment_v2(#1305 ), and add a new Rowset type: BetaRowset based on the new format.
   To support online upgrade from alpha rowset to beta rowset, there are several problems should be resolved:
   
   - add a mechanism for new created table to specify which storage type to use(alpha or beta)
   
   - add a mechanism to change the new loaded rowset's type to BetaRowset for old table
   
   - add a mechanism to convert AlphaRowsets in table to BetaRowset(one method is setting the dst rowset type of compaction)
   
   - get the rowset statistics of rowset of all table
   
   
   
   

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