Method and systems for data storage is provided. Metric data corresponding to a component of a datacenter is received, the metric data associated with a metric instance that identifies the component of the datacenter. It is determined that the metric instance is not stored at an index server. The metric instance is stored at the index server, the metric instance being synchronously stored in a flattened format. A slot identification is generated based on at least a portion of the metric instance, and the metric instance is stored at an inventory server in accordance with the slot identification, the metric instance being asynchronously stored in an unflattened format.