Providing Data Services During Migration

1 . A method comprising:

initiating a migration of a dataset from a source storage system to a target storage system; and

providing, by the target storage system, data services for the dataset before completing migration of the dataset from the source storage system to the target storage system.

2 . The method of claim 1 , wherein the migration is initiated by mapping a volume in the target storage system to the dataset in the source storage system.

3 . The method of claim 2 , wherein the volume is created in response to a request to migrate the dataset from the source storage system to the target storage system.

4 . The method of claim 1 , wherein the data services are provided before any portion of the dataset is copied from the source storage system to the target storage system.

5 . The method of claim 1 , wherein the data services include read/write access and one or more features including at least one of snapshotting, cloning, data reduction, virtual copy, and replication.

6 . The method of claim 1 further comprising:

migrating a portion of the dataset from the source storage system to the target storage system; and

updating a mapping of the target storage system to the dataset to point to a location of the migrated portion in the target storage system.

7 . The method of claim 6 , wherein the dataset is copied from the source storage system to the target storage system without participation by a host.

8 . The method of claim 6 , wherein the dataset is encrypted, and wherein the target storage system includes one or more encryption keys for reading the dataset.

9 . The method of claim 1 further comprising:

receiving, by the target storage system from a host, a request directed at least in part to an unmigrated portion of the dataset; and

servicing, by the target storage system, the request.

10 . The method of claim 9 , wherein an update to the dataset is propagated to the source storage system.

11 . The method of claim 9 , wherein an update to the dataset is not propagated to the source storage system.

12 . The method of claim 1 , further comprising:

replicating migrated portions of the dataset to a cloud-based storage system.

13 . The method of claim 1 , wherein the target storage system and the source storage system are collocated, and wherein one of the target storage system and the source storage system is an on-premises storage system that implements a cloud infrastructure.

14 . An apparatus comprising a computer processor and a computer memory operatively coupled to the computer processor, the computer memory storing computer program instructions that, when executed by the computer processor, cause the apparatus to:

initiate a migration of a dataset from a source storage system to a target storage system; and

provide, by the target storage system, data services for the dataset before completing migration of the dataset from the source storage system to the target storage system.

15 . The apparatus of claim 14 , wherein the migration is initiated by mapping a volume in the target storage system to the dataset in the source storage system.

16 . The apparatus of claim 14 , wherein the data services are provided before any portion of the dataset is copied from the source storage system to the target storage system.

17 . The apparatus of claim 14 , wherein the data services include read/write access and one or more features including at least one of snapshotting, cloning, data reduction, virtual copy, and replication.

18 . The apparatus of claim 14 further comprising computer program instructions that, when executed, cause the apparatus to:

migrate a portion of the dataset from the source storage system to the target storage system; and

update a mapping of the target storage system to the dataset to point to a location of the migrated portion in the target storage system.

19 . The apparatus of claim 14 further comprising computer program instructions that, when executed, cause the apparatus to:

receive, by the target storage system from a host, a request directed at least in part to an unmigrated portion of the dataset; and

service, by the target storage system, the request.

20 . A non-transitory computer readable storage medium storing instructions, which when executed, cause a processing device to:

initiate a migration of a dataset from a source storage system to a target storage system; and

provide, by the target storage system, data services for the dataset before completing migration of the dataset from the source storage system to the target storage system.