Abstract: Techniques are provided for synchronizing database system metadata between primary and standby persistent storage systems using an object store. A first persistent storage system enabled to store first configuration metadata describing the configuration of the first persistent storage system. A first broker process of the first persistent storage system detects receipt, at an object store endpoint, of a new version of an object message sent by a second broker process of a second persistent storage system. The object message specifies a particular value of a configuration attribute of second configuration metadata from the second persistent storage system. In response to detecting receipt of the new version of the object message, the first broker process reads the particular value of the configuration attribute in the object message. The first broker process sets the configuration attribute in the first configuration metadata to the particular value.

Abstract: Techniques herein improve computational efficiency for wildcard searches by using numeric string hashes. In an embodiment, a plurality of query K-gram tokens for a term in a query are generated. Using a first index, an intersection of hash tokens is determined, wherein said first index indexes each query K-gram token of said K-gram tokens to a respective subset of hash tokens of a plurality of hash tokens, each of hash token of said plurality of hash tokens corresponding to a term found in one or more documents of a corpus of documents. The intersection of hash tokens comprises only hash tokens indexed to all of said plurality of query K-gram tokens by said first index. Using a second index, documents of said corpus of documents that contain said term are determined, said second index indexing said hash tokens to a plurality of terms in said corpus of documents and for each term of said plurality of terms, a respective subset of documents of corpus of documents that contain said each term.

Abstract: Techniques herein improve computational efficiency for wildcard searches by using numeric string hashes. In an embodiment, a plurality of query K-gram tokens for a term in a query are generated. Using a first index, an intersection of hash tokens is determined, wherein said first index indexes each query K-gram token of said K-gram tokens to a respective subset of hash tokens of a plurality of hash tokens, each of hash token of said plurality of hash tokens corresponding to a term found in one or more documents of a corpus of documents. The intersection of hash tokens comprises only hash tokens indexed to all of said plurality of query K-gram tokens by said first index. Using a second index, documents of said corpus of documents that contain said term are determined, said second index indexing said hash tokens to a plurality of terms in said corpus of documents and for each term of said plurality of terms, a respective subset of documents of corpus of documents that contain said each term.

Abstract: A data guide is dynamically generated. The data guide describes the structures of hierarchical data objects added to a collection of hierarchical data objects. Examples of hierarchical data objects are documents that conform to XML (Extensible Mark-up Language) or data objects that conform to JSON (JavaScript Object Notation). The data guide may be created and/or updated as hierarchical data objects are added to the collection.

Abstract: A data guide is dynamically generated. The data guide describes the structures of hierarchical data objects added to a collection of hierarchical data objects. Examples of hierarchical data objects are documents that conform to XML (Extensible Mark-up Language) or data objects that conform to JSON (JavaScript Object Notation). The data guide may be created and/or updated as hierarchical data objects are added to the collection.