metadata | ScyllaDB Docs

metadata¶

Module containing classes and fields related to metadata.

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Classes¶

Members¶

Some columns have a specific meaning in the context of a table, and this meaning is represented by the ColumnKind enum.

Name	Type	Description
`Regular`	number	Just a regular column.
`Static`	number	Column that has the same value for all rows in a partition.
`ClusteringKey`	number	Column that is part of the clustering key.
`PartitionKey`	number	Column that is part of the partition key.

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Identifies the replication strategy variant.

Name	Type	Description
`SimpleStrategy`	number	Deprecated in ScyllaDB. Use only for a single datacenter and one rack. Places the first replica on a node determined by the partitioner. Additional replicas are placed on the next nodes clockwise in the ring without considering topology (rack or datacenter location).
`NetworkTopologyStrategy`	number	Use this strategy when you have (or plan to have) your cluster deployed across multiple datacenters. This strategy specifies how many replicas you want in each datacenter. `NetworkTopologyStrategy` places replicas in the same datacenter by walking the ring clockwise until reaching the first node in another rack. It attempts to place replicas on distinct racks because nodes in the same rack (or similar physical grouping) often fail at the same time due to power, cooling, or network issues.
`LocalStrategy`	number	Used for internal purposes, e.g. for system tables.
`Other`	number	Unknown other strategy, which is not supported by the driver.

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