Benefits of Partition Key
The Partition Key is the core concept in Azure Cosmos DB which provides numerous benefits including Scalability, Performance Optimization and Query Efficiency.
Scalability
Azure Cosmos DB partitions data horizontally and distributes data across physical partitions based on the partition key value. So by scaling horizontally Cosmos DB database can handle large volumes of data and high throughput.
Performance
The partition key which helps in evenly distributing data across multiple partitions, enables to parallelize read and write operations and prevents any single partition becoming a bottleneck. So the right partition key is crucial for consistent and optimal performance even when data volume and access patterns change.
Query Efficiency
In Cosmos DB, when queries are run with the partition key in their filter, it can execute very efficiently as the query can target a single partition. So partition key helps to retrieve data efficiently and with minimal latency. Queries that do not have partition key filter may perform cross-partition scan, leading to less efficient and high latency output when there is large datasets.
Changing the Partition Key
While creating a partition key all factors should be analysed so that it is the right one and best suited for grouping data and data lookups. Once a partition key is added when a container is created, it can not be changed. Only option to change partition key is to migrate data from one container to another, which can re-distribute data based on the new partition key.
What is Partition Key In Azure Cosmos DB
The Partition Key in Azure Cosmos DB is an important factor for distributing data efficiently across the database’s physical partitions. The partition key plays an important role in storing and accessing data and the partition key makes the filtering data more efficient and optimized. In this article we will discuss the partition key in Azure Cosmos DB, how it is created, and how it is used in data storage and data retrieval.