hesela.devSMORE
SMORE is a research object store that stripes objects across SMR zone sets and reconstructs its flash-resident index from on-disk recovery records.
The 2017 extended paper targets large, seldom-changing objects on host-managed or host-aware SMR disks. Zone sets span different drives; segment headers, deletion tombstones and zone-set digests support recovery from index snapshots. [1]
Its prototype uses 5+1 RAID-4 parity. Figure 6 includes that parity cost, giving a write-amplification floor of 1.2; the abstract's below-2.0 statement excludes parity. These accounting boundaries must not be mixed. [1]
Relations
- related
- Host-managed SMR (HM-SMR), SMRSTORE
Limitations
- The main tests use every 60th zone of six 10 TB drives, yielding 766 GB of usable test capacity; selected full-capacity checks do not make every recovery extrapolation a measurement. [1]
- Optional NVRAM buffering adds a separate failure boundary: disk parity cannot recover data still confined to failed buffers; the paper discusses peer recovery or flushing before acknowledgement. [1]
Citations
Further reading
Sources & caveats
- Primary-paper review, not a reproduced benchmark. Performance and recovery results describe the stated historical configuration.
- The evaluated drives were HGST Ultrastar Archive Ha10. Full bibliographic details and source locators are recorded in the versioned research review.