cd2a2e7711
* Moves saga to Java 11 * Moves semaphore to Java 11 * Moves servant to Java 11 * Moves serverless to Java 11 * Moves service-layer to Java 11 * Moves service-locator to Java 11 * Moves sharding to Java 11 * Moves singleton to Java 11 * Moves spatial-partition to Java 11 * Moves specification to Java 11 * Moves state to Java 11 * Moves step-builder to Java 11 * Moves strategy to Java 11 * Moves subclass-sandbox to Java 11 * Fixes checkstyle issues
layout, title, folder, permalink, categories, tags
| layout | title | folder | permalink | categories | tags | ||
|---|---|---|---|---|---|---|---|
| pattern | Sharding | sharding | /patterns/sharding/ | Behavioral |
|
Intent
Sharding pattern means divide the data store into horizontal partitions or shards. Each shard has the same schema, but holds its own distinct subset of the data. A shard is a data store in its own right (it can contain the data for many entities of different types), running on a server acting as a storage node.
Class diagram
Applicability
This pattern offers the following benefits:
- You can scale the system out by adding further shards running on additional storage nodes.
- A system can use off the shelf commodity hardware rather than specialized (and expensive) computers for each storage node.
- You can reduce contention and improved performance by balancing the workload across shards.
- In the cloud, shards can be located physically close to the users that will access the data.