I have following questions about some features which are needed in my
applications.
1. The current HBase release(0.89, 0.90 ~) does not support to modify table
schema online.
If I want add or delete a ColumnFamily, I must disable/offline the
table firstly.
Is there a plan to support online modification?
I think after the table schema info is moved into ZooKeeper from
RegionServer, this feature is possible to be supported.
2. Different memstore/memtable-size and region-size for different table.
This feature is useful for different tables for different applications.
Is there a plan to support it?
3. Periodic flush.
Current HBase only flush memstore to HFile by memory size thresholds.
If a Region-Store is quiet for a long time (such as 2 hours) for a
write-dense application, the periodic flush can free more memory.
Is there a plan to support it?
Schubert Zhang
