hi, i am interested in HBASE and have viewed lots of materials about it,
but now i have some questions!
The first question is about the data layout and its index,maybe you can tell
me about the difference on Mfile,Hfile and Tfile.
The second is about the caches(both metadata cache and data cache),i want
to know if there are ,where they locate in and how they work.
The third is about the hbase shell, which implements an alter command,
that can change or add or delete a column family,but i remember the column
family cannot be changed after the table is created. I also want to know
default max VERSIONs, when i create a table i give the VERSION 2,later i put
three values for the same row+column and different timestamp, but i can get
values rather than only two.
I wish your detail answers, thanks!
