US 10,649,952 B1Granted

Using a secondary storage system to maintain functionality of a database during database migration

AssigneeCohesity, Inc.

InventorsAbhijit Chakankar, Manoj Singhal, Warren Shen, Sashikanth Madduri, Rupesh Bajaj, Vivek Velankar, Sandeep Tandekar, Sunil Moolchandani, Apollo Tanting, Aditya Tandon

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Abstract

A request to migrate from a secondary storage system to a server a requested version of database content of a database backed up at the secondary storage system is received. A new version of the database content at the secondary storage system is instantiated. Functionality of the database is maintained including by allowing a database application hosted on the server to access the database content from the secondary storage system using the instantiated new version of the database content while migrating the requested version of database content from the secondary storage system to the server.

Claims17

Dependent claims

A system, comprising:

one or more processors configured to:
receive a request to migrate from a secondary storage system to a server a requested version of database content of a database backed up at the secondary storage system, wherein the requested version of the database content of the database is backed up from a primary system to the secondary storage system, wherein the server is separate from the primary system;
instantiate a new version of the database content at the secondary storage system, wherein to instantiate a new version of the database content at the secondary storage system, the one or more processors are configured to:
clone a view associated with the requested version of the database content;
and
mount the database based on data associated with the cloned view associated with the requested version of the database content;
and
maintain functionality of the database including by allowing a database application hosted on the server to access the database content from the secondary storage system using the instantiated new version of the database content while migrating the requested version of database content from the secondary storage system to the server, wherein to maintain functionality of the database content while migrating the requested version of database content from the secondary storage system to the server, the one or more processors is further configured to:
modify the cloned view associated with the requested version of the database content while a migration instance is being performed;
receive an indication that the migration instance is completed;
in response to the indication that the migration instance is completed, the one or more processors are configured to:
clone the modified cloned view associated with the requested version of the database content;
determine an amount of time to migrate from the secondary storage system to the server the data associated with the cloned modified cloned view;
and
finish a migration of the database content to the server based on whether the determined amount of time is less than a downtime threshold;
and
a memory coupled to the one or more processors and configured to provide the one or more processors with instructions.

14 more elements

A computer program product for migrating database content, the computer program product being embodied in a non-transitory computer readable storage medium and comprising computer instructions for:

receiving a request to migrate from a secondary storage system to a server a requested version of database content of a database backed up at the secondary storage system, wherein the requested version of the database content of the database is backed up from a primary system to the secondary storage system, wherein the server is separate from the primary system;
instantiating a new version of the database content at the secondary storage system, wherein instantiating a new version of the database content at the secondary storage system comprises:
cloning a view associated with the requested version of the database content;
and
mounting the database based on data associated with the cloned view associated with the requested version of the database content;
and
maintaining functionality of the database including by allowing a database application hosted on the server to access the database content from the secondary storage system using the instantiated new version of the database content while migrating the requested version of database content from the secondary storage system to the server, wherein maintaining functionality of the database content while migrating the requested version of database content from the secondary storage system to the server comprises:
modifying the cloned view associated with the requested version of the database content while a migration instance is being performed;
receiving an indication that the migration instance is completed;
in response to the indication that the migration instance is completed:
cloning the modified cloned view associated with the requested version of the database content;
and
determining an amount of time to migrate from the secondary storage system to the server the data associated with the cloned modified cloned view;
and
finishing a migration of the database content to the server based on whether the determined amount of time is less than a downtime threshold.

12 more elements

Dependencies are inferred from the claim text.