Systems and methods of amortizing deletion processing of a log structured storage based volume virtualization
US11163446B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2017 |
| Grant date | Nov 2, 2021 |
| Priority date | — |
| Expiry date | Jun 16, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/275
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Techniques for amortizing metadata updates due to data delete operations in data storage systems that implement log structured storage of data from virtual volumes. The techniques employ a segment database (DB) and a deleted chunk DB. The segment DB is implemented as a key-value store. The deleted chunk DB is likewise implemented as a key-value store, but configured as a log structured merge (LSM) tree. By configuring the deleted chunk DB as an LSM-tree, more efficient use of memory and improved reduction of metadata updates can be achieved. Stored segments of log structured data can also be effectively “cleaned” in a background process that involves ordered traversals of the segment DB and the deleted chunk DB, allowing for more efficient recovery of storage space consumed by the deleted data chunks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.