Abstract: Methods, systems, and computer-readable media for migration to a two-tiered data store are disclosed. A destination data store comprises a primary (warm) tier and a secondary (cold) tier having higher latency for data access than the primary tier. Migration is initiated of live updates from a source data store to the primary tier of the destination data store. A replica of the source data store is generated while the source data store is online. Transform logic is optionally applied to source data from the replica of the source data store. The source data (transformed or not) is imported to the secondary tier of the destination data store.

Abstract: Techniques are described for employing precomputed results of applying rules to content items, the rules applicable to determine whether content items may be electronically published. On receiving a request for a content item, rules applicable to the content item may be identified. A datastore of precomputed results of rule application may be accessed to determine whether the datastore includes a result of applying a current or previous version of each rule. If the datastore includes a current result, the current result may be employed in determine whether the content item may be presented. If the datastore includes a previous result, the previous result may be so employed. If the datastore includes a previous result or no appropriate result, a job may be queued to calculate the current result asynchronously relative to the request for the content item.

Abstract: Methods and systems for index-based querying of archived data sets are disclosed. A plurality of indices are generated, each comprising a plurality of pointers to storage locations of a plurality of updates to a document. A query request is received after generating the plurality of indices. The query request comprises an identifier of the document and a specified time range. A subset of the indices that comprise the identifier of the document within the specified time range are determined. From the subset of the indices are retrieved a subset of the pointers to the storage locations for one or more of the updates to the document within the specified time range. The one or more updates to the document within the specified time range are retrieved using the subset of the plurality of pointers.

Abstract: Techniques are described for retrieving data stored in disparate datastores that support different or heterogeneous storage systems. A report description may be received from a user, the report description including multiple query templates for generating queries to retrieve data from the disparate datastores. The report description may be analyzed to determine input parameters for generating the queries. A user interface may be dynamically generated to solicit input values corresponding to the input parameters. On receiving the input values, the system may generate and execute the queries of the query plan, and combine the results based on result combination information included in the report description.