1. We store high cardinality metrics in object storage and only keep most recent data in memory. We use serverless functions (lambdas) for querying these objects which helps us scale.
2. We do not have a global index - each hour of metrics have their own index. This helps with ephemeral labels as size of the index remains small
2. We do not have a global index - each hour of metrics have their own index. This helps with ephemeral labels as size of the index remains small