Which operation reorders and encodes Delta parquet data to improve read performance?

Which operation reorders and encodes Delta parquet data to improve read performance?

• A. V-ORDER
• B. OPTIMIZE
• C. VACUUM
• D. ALM Toolkit

Answer: (A)

Reordering data layouts to match how queries access data can dramatically speed reads. V-ORDER is about reorganizing Delta Parquet data so that values likely to be filtered together are stored close to each other and then applying encoding to those blocks. This layout forces related data to reside in nearby blocks, which means a query with predicates on those columns can read fewer blocks and benefit from better compression, resulting in faster scans and lower I/O. Vacuum simply cleans up old or unused files; it doesn’t change how data is stored or read. The ALM Toolkit is a tooling suite for governance and metadata, not for physical data layout. While OPTIMIZE with Z-ORDER is another common way to improve read performance by clustering data on frequently filtered columns, the operation described here specifically is V-ORDER, which conveys the act of reordering and encoding to optimize reads.

Reordering data layouts to match how queries access data can dramatically speed reads. V-ORDER is about reorganizing Delta Parquet data so that values likely to be filtered together are stored close to each other and then applying encoding to those blocks. This layout forces related data to reside in nearby blocks, which means a query with predicates on those columns can read fewer blocks and benefit from better compression, resulting in faster scans and lower I/O.

Vacuum simply cleans up old or unused files; it doesn’t change how data is stored or read. The ALM Toolkit is a tooling suite for governance and metadata, not for physical data layout. While OPTIMIZE with Z-ORDER is another common way to improve read performance by clustering data on frequently filtered columns, the operation described here specifically is V-ORDER, which conveys the act of reordering and encoding to optimize reads.