In a bunch of places in the code we wrap a CF in a Row object,
basically a key + multiple CFs. But currently only a single
ColumnFamily will ever be in a Row object. (At least in the Rows
involved in a client read op. Maybe Rows are used internally in other
places with multiple CFs. But I am
Yes, each CF has its own memtable. The writes are atomic in the sense
that I can still do an all-or-nothing write to multiple CFs (the
CommitLog still logs the whole row). Having multiple CFs with their
own memtable simply means that concurrent operations may not be
*isolated* from each other. So,
