The global dictionary is stored in kylin metadata table. So you can backup the metadata to local disk, then you can find and check the dictionary size there.
The bitmap, as a measure, is stored in Cube (in HBase). The HBase table's size can roughly reflect its size, but that is the total size of all dimensions/measures. If you put the count distinct measure in a separate column family, then you can size that CF's HFile (this is just my guess, not verified). 2017-08-31 10:19 GMT+08:00 Yuxiang Mai <[email protected]>: > Hi, all > > We are now testing Kylin count distinct function. It works good. But we > have some questions about the global dictionary & bitmap: > > We need to do count distinct across cube segment on a bigint column, so we > use Global dictionary Builder. We found that the cube segment storage size > approximately double after adding count_distinct in measures. It's stated > that there are a global bitmap & dictionary to do the distinct. > I wonder how to check the size of the global bitmap & dictionary? Because > in Kylin web UI, we only can check the size of the cube segment. And where > is the global bitmap & dictionary storage location? A cube segment is > stored as a table in HBASE, but I can't find any Hbase tables related to > the global bitmap & dictionary. > > Thanks in advance for your help. > > > > -- > Yuxiang Mai > > -- Best regards, Shaofeng Shi 史少锋
