Providing data deduplication in a data storage system with parallelized computation of crypto-digests for blocks of host I/O data
US10936228B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2019 |
| Grant date | Mar 2, 2021 |
| Priority date | — |
| Expiry date | Jul 5, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/402
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In response to a cache flush event indicating that host data accumulated in a cache of a storage processor of a data storage system is to be flushed to a lower deck file system, an aggregation set of blocks is formed within the cache, and a digest calculation group is selected from within the aggregation set. Hardware vector processing logic is caused to simultaneously calculate crypto-digests from the blocks in the digest calculation group. If one of the resulting crypto-digests matches a previously generated crypto-digest, deduplication is performed that i) causes the lower deck file system to indicate the block of data from which the previously generated crypto-digest was generated and ii) discards the block that corresponds to the matching crypto-digest. Objects required by a digest generation component may be allocated in a just in time manner to avoid having to manage a pool of pre-allocated objects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.