Splitting the ledger
Names are mostly A–D. You split A–M / N–Z. What happens?
One ledger got too heavy, so the orders are filed across several books on a shelf. Each tab is a different rule for deciding which book a name goes in, and the load bars show what that rule costs. Watch one book turn hot while its neighbours sit idle.
Board: Splitting the Ledger →The load bars and the name list stack on a narrow screen; the book-count slider and shard-key tabs sit above them.
try this Start on Split by letter, read the load bars under The books, then switch to Scrambled name and press Add a book.
Included with a plan
This lab is included with a plan. The first three lessons of every track are free, with their boards and videos. A plan unlocks every lesson, board, video, lab and paper for one price.
see also Dynamo: Amazon's Highly Available Key-value Store, MapReduce: Simplified Data Processing on Large Clusters, Bigtable: A Distributed Storage System for Structured Data, Consistent Hashing and Random Trees, Kafka: a Distributed Messaging System for Log Processing, Zanzibar: Google's Consistent, Global Authorization System and Scaling Memcache at Facebook in Papers.