0 votes
in Big Data | Hadoop by

What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

1 Answer

0 votes
by

The logical deviation of data is represented through a key known as column Family. Column families consist of the basic unit of physical storage on which compression features can be applied. In an already populated database, when the block size of column family is altered, the old data will remain within the old block size whereas the new data that comes in will take the new block size. When compaction takes place, the old data will take the new block size so that the existing data is read correctly.

Related questions

0 votes
asked Jan 11, 2020 in Big Data | Hadoop by rajeshsharma
0 votes
asked Sep 7, 2019 in Big Data | Hadoop by john ganales
...