Question

The equivalent Hbase structure of an on-disk trees in log-structured merge trees is - options are 1. Wal. 2. Memstore 3. Block-cache 4. Storetable 5. None of these

Answer 1

The Equivalent Hbase structure of on-disk trees in log-structured merge trees is could be 'Memstore'.

Short notes on Memstore:

(i) It is a cache memory (or) write buffer.

(ii) Its contents are flushed to disk to form an Hfile when the Memstore fills up.

(iii) There is only one Memstore per column family.

(ii) The updates in memory are stored in Memstore.

(iv) Size of the memstore is defined by the system-wide property in hbase-site.xml.

Advantages of Memstore:

(i) It keeps recently added data.

(ii) Every Memstore flush does create one Hfile per colum families.

Hope it helps!

Answer 2

memstore is the correct answer