Level | Description | Usage |
---|---|---|
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Queries return the most recent data from all replica nodes in the cluster. All replica nodes must must respond. |
This read consistency level provides the highest consistency, the highest latency, and the lowest availability of any level. |
|
Queries return the most recent data from a quorum of replica nodes across all datacenters. |
Cross-datacenter communication may incur extra latency. |
|
Queries return data from the closest replica. |
Use for high availability and low consistency. |
|
Queries return the most recent data from two of the closest replicas. Two replica nodes must respond. |
Similar to |
|
Queries return the most recent data from three of the closest replicas. Three replica nodes must respond. |
Similar to |
|
Queries returns the most recent data from a quorum of replicas in the current datacenter.
|
Use |
|
Queries return the most recent data from a quorum of replica nodes in each datacenter has responded. |
Use |
|
Queries return data from the closest replica node in the local datacenter. |
Use |
|
Read consistency level |
Use to achieve linearizable consistency for lightweight transactions. |
|
Read consistency level |
Use to achieve linearizable consistency for lightweight transactions. |
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