Re: In-place updates in a MemTable?

2017-02-03 Thread Artur Siekielski
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 Si

In-place updates in a MemTable?

2017-02-03 Thread Artur Siekielski
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)