After studying org.apache.cassandra.db.Memtable.put method it looks like
the update is made in-place. The MemTable is just a mapping from a row
key to a single btree of column values, and an update operation just
updates the btree stored under the existing key.
On 02/03/2017 11:21 AM, Artur Siekielski wrote:
Hi,
if I issue an update to a row (non-PK keys), and the old row is still
stored in a MemTable, is the old row updated in-place in the MemTable,
or a new entry in the MemTable in created and the old row will be
removed only by the SSTable compaction process?
(Cassandra 2.1)
