Emc Corporation

Pivotal Software, Inc.

Kenneth A Sell

Jeffrey Ira Cohen

Caleb E Welton

Milena Bergant

King Lun Choi

A method, article of manufacture, and apparatus for processing information are disclosed. In some embodiments, this includes completing a disk operation, retrieving a NIC from a NIC queue, retrieving a list of files to transfer, and transferring data to a target disk based on the retrieved NIC and based on the list of files. In some embodiments, transferring data to a target disk includes writing data to a target disk, and wherein writing data to a target disk is the only disk operation performed on the target disk.

Dynamic data movement

A method, article of manufacture, and apparatus for processing information are disclosed. In some embodiments, this includes collecting information about a database, determining a first disk to read from based on the collected information, determining a second disk to write to based on the collected information, and performing a write operation on the second disk. In some embodiments, a read operation may be performed on the first disk contemporaneously with the write operation on the second disk, and the read operation may be the only operation performed on the first disk at a time.

Efficient data movement

A process for upgrading a mirrored shared-nothing database system comprises a sequence of short well-defined idempotent steps, and at least one non-idempotent step involving transforming a master catalog. The upgrade process is managed and controlled by a state machine that has a persistent memory running on the master node. In the event of a failure or crash during an idempotent step, the process stops the database in the current state and repeats the step. If a failure or crash occurs during a non-idempotent step, the upgrade process is rolled back to the beginning and repeated.

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Sunnyvale, CA, United States of America

Kenneth A Sell