# Cross-Shard Queries

> The degree of difficulty and cost of a query that must gather data from multiple shards.

Record: `lexicon:cross-shard-queries`
Kind: quality-attribute
Layer: [Performance Core](https://banes-lab.com/records/layer/performance-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-cross-shard-queries

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [CPU Cost](https://banes-lab.com/records/lexicon/cpu-cost.md) and before [Distributed Complexity](https://banes-lab.com/records/lexicon/distributed-complexity.md).

## Category

- [Scalability / Performance / Optimization](https://banes-lab.com/records/lexicon-category/scalability-performance-optimization.md)

## In tension with

- [Sharding](https://banes-lab.com/records/architecture/sharding.md)
- [Sharding / Cross-Shard Queries](https://banes-lab.com/records/tension/cross-shard-queries-sharding.md)

## Linked from

- [Scalability / Performance / Optimization](https://banes-lab.com/ontology/principles/architecture-category-scalability-performance-optimization.md)
- [The resolutions](https://banes-lab.com/ontology/schema/the-resolutions.md)