What is the purpose of a Data Block within an SSTable?

A Data Block is the actual unit of storage inside an SSTable that holds a contiguous, sorted group of key-value pairs.

• An SSTable is made up of many data blocks, each covering a small portion of that file's overall sorted key range
• The SSTable's index block records where each data block starts, letting RocksDB jump directly to the relevant one
• Data blocks are the unit that gets compressed, cached, and read from disk, rather than the SSTable file as a whole

Splitting an SSTable into many smaller data blocks is what makes it practical to read just the small piece of a large file that's actually relevant to a given lookup.

Invest now in Acorns!!! 🚀
Join Acorns and get your $5 bonus!

Acorns is a micro-investing app that automatically invests your "spare change" from daily purchases into diversified, expert-built portfolios of ETFs. It is designed for beginners, allowing you to start investing with as little as $5. The service automates saving and investing. Disclosure: I may receive a referral bonus.

Invest now!!! Get Free equity stock (US, UK only)!

Use Robinhood app to invest in stocks. It is safe and secure. Use the Referral link to claim your free stock when you sign up!.

The Robinhood app makes it easy to trade stocks, crypto and more.

Webull! Receive free stock by signing up using the link: Webull signup.