Prioritized thin provisioning with eviction overflow between tiers

A method implemented at a computer system for prioritized thin provisioning with eviction overflow between tiers, the method comprising:

• thinly provisioning and tiering a plurality of logical volumes over a plurality of types of storage, including thinly provisioning and tiering each of a first logical volume and a second logical volume over the plurality of types of storage;
• monitoring status of the plurality of logical volumes to detect one or more events associated with at least one of the plurality of logical volumes;
• in response to detecting a first event:
• selecting a set of data stored in a portion of the first logical volume;
• copying the set of data to the second logical volume;
• and
• deallocating the portion of the first logical volume that stores the set of data;
• and
• in response to detecting a second event:
• selecting a portion of the second logical volume that is thinly provisioned over a particular type of storage;
• deallocating a first portion of the particular type of storage that corresponds to the portion of the second logical volume;
• and
• allocating a second portion of the particular type of storage to the first logical volume.

A computer system-readable hardware storage device having stored thereon computer system-executable instructions that are structured such that when the computer system-executable instructions are executed by a processor, a computer system is configured to perform at least:

• thinly provision and tier a plurality of logical volumes over a plurality of types of storage, including thinly provisioning and tiering each of a first logical volume and a second logical volume over the plurality of types of storage;
• monitor status of the plurality of logical volumes to detect one or more events associated with at least one of the plurality of logical volumes;
• in response to detecting a first event:
• select a set of data stored in a portion of the first logical volume;
• copy the set of data to the second logical volume;
• and
• deallocate the portion of the first logical volume that stores the set of data;
• and
• in response to detecting a second event:
• select a portion of the second logical volume that is thinly provisioned over a particular type of storage;
• deallocate a first portion of the particular type of storage that corresponds to the portion of the second logical volume;
• and
• allocate a second portion of the particular type of storage to the first logical volume.