Alexandru C Chirica

US Patent:

8401998, Mar 19, 2013

Filed:

Sep 2, 2010

Appl. No.:

12/875004

Inventors:

Pradeep Jnana Madhavarapu - Kirkland WA, US
Priyank Porwal - Redmond WA, US
Vaibhav Kamra - Bellevue WA, US
Alexandru C. Chirica - Toledo OH, US
Cristian Diaconu - Kirkland WA, US
Jun Fang - Sammamish WA, US
Srinivasmurthy P. Acharya - Sammamish WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 17/30

US Classification:

707655, 707660

Abstract:

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.

US Patent:

20110289100, Nov 24, 2011

Filed:

May 21, 2010

Appl. No.:

12/784508

Inventors:

Pradeep Madhavarapu - Kirkland WA, US
Michael Warmington - Redmond WA, US
Alexandru Chirica - Redmond WA, US
Jun Fang - Sammamish WA, US
Rohan Kumar - Redmond WA, US
Maciej Plaza - Bellevue WA, US
Srini Acharya - Sammamish WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 17/30

US Classification:

707769, 707812, 707E17044, 707E17005, 707E17014

Abstract:

A method for managing a binary object in a database system is provided. The method may include receiving a request to store the binary object and determining if a size of the binary object is above a first threshold. If the size is less than the first threshold, the method may include storing the binary object in a database of the database system using a database communication protocol. If the size is above the first threshold, the method may include determining if the size is above a second threshold. To this end, if the size is less than the second threshold, the method may include storing the binary object in a file system of the database system using the database communication protocol. Furthermore, if the size is above the second threshold, the method may include storing the binary object in the file system using a file system communication protocol.

US Patent:

20120041928, Feb 16, 2012

Filed:

Aug 16, 2010

Appl. No.:

12/856688

Inventors:

Vaibhav Kamra - Seattle WA, US
Pradeep Madhavarapu - Kirkland WA, US
Cristian Diaconu - Redmond WA, US
Priyank Porwal - Redmond WA, US
Jun Fang - Sammamish WA, US
Alexandru Chirica - Redmond WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 12/16
G06F 17/30

US Classification:

707656, 707E17005

Abstract:

A method for mirroring one or more data changes from a first database server to one or more second database servers. The method includes intercepting one or more operations that make one or more changes to one or more data on the first database server. After intercepting these operations, the method merges the operations into one or more chunks, adds one or more log records having the chunks into a database log. The database log includes one or more database log blocks. The method then writes the database log blocks.

US Patent:

20120303667, Nov 29, 2012

Filed:

Aug 2, 2012

Appl. No.:

13/565608

Inventors:

Pradeep Madhavarapu - Kirkland WA, US
Michael Warmington - Redmond WA, US
Alexandru Chirica - Redmond WA, US
Jun Fang - Sammamish WA, US
Rohan Kumar - Redmond WA, US
Maciej Plaza - Bellevue WA, US
Srini Acharya - Sammamish WA, US

Assignee:

MICROSOFT CORPORATION - Redmond WA

International Classification:

G06F 17/30

US Classification:

707791, 707802, 707E17044, 707E17032

Abstract:

A method for managing a binary object in a database system is provided. The method may include receiving a request to store the binary object and determining if a size of the binary object is above a first threshold. If the size is less than the first threshold, the method may include storing the binary object in a database of the database system using a database communication protocol. If the size is above the first threshold, the method may include determining if the size is above a second threshold. To this end, if the size is less than the second threshold, the method may include storing the binary object in a file system of the database system using the database communication protocol. Furthermore, if the size is above the second threshold, the method may include storing the binary object in the file system using a file system communication protocol.

US Patent:

20130198142, Aug 1, 2013

Filed:

Mar 13, 2013

Appl. No.:

13/801024

Inventors:

MICROSOFT CORPORATION - Redmond WA, US
Priyank Porwal - Redmond WA, US
Vaibhav Kamra - Bellevue WA, US
Alexandru C. Chirica - Toledo OH, US
Cristian Diaconu - Kirkland WA, US
Jun Fang - Sammamish WA, US
Srinivasmurthy P. Acharya - Sammamish WA, US

Assignee:

MICROSOFT CORPORATION - REDMOND WA

International Classification:

G06F 17/30

US Classification:

707658

Abstract:

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.

US Patent:

20160253341, Sep 1, 2016

Filed:

May 6, 2016

Appl. No.:

15/148600

Inventors:

- Redmond WA, US
Michael Warmington - Redmond WA, US
Alexandru Chirica - Redmond WA, US
Jun Fang - Sammamish WA, US
Rohan Kumar - Redmond WA, US
Maciej Plaza - Bellevue WA, US
Srini Acharya - Sammamish WA, US

International Classification:

G06F 17/30

Abstract:

A method for managing a binary object in a database system is provided. The method may include receiving a request to store the binary object and determining if a size of the binary object is above a first threshold. If the size is less than the first threshold, the method may include storing the binary object in a database of the database system using a database communication protocol. If the size is above the first threshold, the method may include determining if the size is above a second threshold. To this end, if the size is less than the second threshold, the method may include storing the binary object in a file system of the database system using the database communication protocol. Furthermore, if the size is above the second threshold, the method may include storing the binary object in the file system using a file system communication protocol.

US Patent:

20150006493, Jan 1, 2015

Filed:

Sep 15, 2014

Appl. No.:

14/487066

Inventors:

- Redmond WA, US
Michael Warmington - Redmond WA, US
Alexandru Chirica - Redmond WA, US
Jun Fang - Sammamish WA, US
Rohan Kumar - Redmond WA, US
Maciej Plaza - Bellevue WA, US
Srini Acharya - Sammamish WA, US

International Classification:

G06F 17/30

US Classification:

707694

Abstract:

A method for managing a binary object in a database system is provided. The method may include receiving a request to store the binary object and determining if a size of the binary object is above a first threshold. If the size is less than the first threshold, the method may include storing the binary object in a database of the database system using a database communication protocol. If the size is above the first threshold, the method may include determining if the size is above a second threshold. To this end, if the size is less than the second threshold, the method may include storing the binary object in a file system of the database system using the database communication protocol. Furthermore, if the size is above the second threshold, the method may include storing the binary object in the file system using a file system communication protocol.