Microsoft Technology Licensing, LLC

Srinivasmurthy P Acharya

Jun Fang

Amit Shukla

Cristian Diaconu

Balan Sethu Raman

Nigel Robin Ellis

Michael W Thomas

Jason Todd Hunter

Pradeep Madhavarapu

Bekim Demiroski

Alexandru C Chirica

Sambavi Muthukrishnan

Vaibhav Kamra

Priyank Porwal

Mahadevan Venkatraman

Kim Cameron

Michael Pizzo

Johannes Klein

Anil Kumar Nori

Michael Jack Newman

Alexander Vaschillo

Rodger N Kline

Gregory Scott Friedman

Lijiang Fang

Peter Alan Carlin

Michael Eric Deem

J Patrick Thompson

Sanjay Anand

Anurag Gupta

Maxim Mazeev

Jack Smith Richins

John Patrick Thompson

Denise L Chen

Robert Thompson Whitney

Jeffrey T Pearce

Salome Jacob

James David Ryseff

Hua Yuan

Chang Luo

Siddhartha Singh

Joseph Trdinich

Sameet H Argawal

Roopali Kaujalgi

High availability and disaster recovery can be achieved within a database management system by detecting which parts of a file have changed and sending the changed parts to secondary servers, without sending the entire file that has experienced the changes. A log cracker reads data from a transaction log that stores records from a database and a separately maintained file system. The log cracker sends mirror commands with some of the transaction log data to the file system to initiate mirroring of the data from the file system to secondary servers. The log data is then subsequently sent to the secondary servers as well, to enable identification of changed data without having to transfer the entire file that has been changed.

Mirroring file data

The present invention extends to methods, systems, and computer program products for mirroring file data. Generally, high availability and disaster recovery ('HADRON') is achieved within a database management system by detecting which parts of a file have changed and sending the changed parts to secondaries. Adjacent or partially overlapping parts of a file can coalesce to form larger chunks of changed data. Coalescing reduces the overall number of chunks that are tracked.

Systems and methods that group atomic scalar values recognized by a database such as columns into sets (e.g., column sets). A grouping component associated with the SQL server creates a logical representation for column groupings, which are accessible by a single I/O and can be co-located (e.g., substantially close or compact) in terms of storage location. Interesting column sets (e.g., non-null) can also be selected for a data representation thereof as a single entity to other applications.

Scalar representation for a logical group of columns in relational databases

A programming interface for a computer platform can include various functionality. In certain embodiments, the programming interface includes one or more of the following groups of types or functions: those related to core file system concepts, those related to entities that a human being can contact, those related to documents, those common to multiple kinds of media, those specific to audio media, those specific to video media, those specific to image media, those specific to electronic mail messages, and those related to identifying particular locations.

Programming interface for a computer platform

An arbitration policy resolves software applications operating on a single unit of data in a manner conflicting with other applications that operates on the same data or properties of the data. This is accomplished through picking an entity type of one application to have priority over an entity type of another application when both entity types map to a same property which caused the conflict. This allows user to observe the data in a consistent manner when switching between applications.

Arbitration mechanisms to deal with conflicting applications and user data

Various embodiments of the present invention are directed to a hardware/software interface system for a computer system for manipulating a plurality of discrete units of information at a hardware/software interface system level, Items, the Items interconnected by Relationships and where Items have Relationships to other Items. One such relationship between Items may be for the purposes of logically denoting to the hardware/software interface system whether one Item is public and accessible or private and unaccessible to another Item.

Systems and methods for separating units of information manageable by a hardware/software interface system from their physical organization

A framework for data change notification includes a notification queue storing event notifications. Client applications can request event information regarding various data change events. For example, a client application can subscribe, via one or more APIs, to receive event information. The framework allows for session specific event notification mechanisms as well as durable event notification mechanisms that can be preserved across client sessions as well as server restarts. Innovative aspects of this invention include guaranteed delivery of event notifications, APIs to allow applications get summary of past events on the subscribed objects, automatic garbage collection/cleanup of notifications when a client session terminates.

Providing change notifications to an entity-regarding a change of a specific type to data in a relational database

Rich structured data for items in a file system that allows different kinds of data to be identified by metadata is mapped into a set of search properties for a desktop search service, which is a flat list. This is applicable to any rich structured data that should be mapped into search properties for a desktop search service. Included is an installation mechanism to install these mappings and an execution infrastructure for utilizing the generated SQL from the mappings to extract search properties from items.

Defining and extracting a flat list of search properties from a rich structured type

The subject invention provides a system and/or a method that facilitates mapping a data base model to a database object. A type storage system can utilize a storage mapping of a file storage data model. The mapping can describe the database object created based at least in part upon a schema and how instances of the type described in the schema are stored and/or accessed. Furthermore, a query can be provided to find at least one of an item, a document, and/or a contact that satisfy at least one criterion. The type storage system can receive data, wherein the data is at least one of a schema, a data model, a type, a query, and query criteria via an interface to provide the storing and querying. Additionally, the type storage system can generate a view that exposes at least one instance of the type.

Mapping of a file system model to a database object

The subject invention provides a system and/or a method that facilitates adapting at least two disparate file systems. A file system adapter can provide uniformity and/or seamless integration between a first file system and a second file system. The file system adapter can employ a file-backed item that is enriched by a file to provide at least one of a property to an item and a file stream associated with the item. The file-backed item can allow a manipulation by at least one of an API for the first file system and an API for the second file system.

File system represented inside a database

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Sammamish, WA, United States of America

Srinivasmurthy P Acharya