Snap Inc.

Tittu Jose

David Andrew Killian

James Daniel Baird

Ovais Ahmad Khan

Arunachalam Thirupathi

Systems, methods, and computer readable media for a live data migration system where the methods include accessing a command to perform a live data migration of a source datastore to a target datastore, accessing a delete operation, the delete operation indicating first data to be deleted from a datastore, and determining the datastore is stored in a source datastore. The methods further includes performing a two-phase commit delete of the first data from the source datastore and the target datastore, accessing a write operation, the write operation indicating second data, and performing a two-phase commit write of the second data to the source datastore and to the target datastore. The methods further include copying the source datastore to the target datastore, accessing a read operation, the read operation indicating third data to be read from the datastore, and performing the read operation of the third data from the target datastore.

Live data migration system

A decentralized two-phase commit in a datastore or database includes determining pre-validating a transaction, writing first metadata to a leader partition, the first metadata including a state indicating preparing and mutations of the transaction, and writing second metadata of a follower partition to indicate the follower partition is locked by the leader partition. The decentralized two-phase commit further includes updating the state of the first metadata to indicate committed and performing the transaction on the leader partition, performing the transaction on the follower partition and unlocking the follower partition, and updating the first metadata to remove the mutations of the transaction and updating the state of the first metadata to indicate the transaction is completed. The decentralized two-phase commit may further include selecting a leader partition key and updating the state of the first metadata to indicate committed unapplied.

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Sammamish, WA, United States of America

Tittu Jose