Walnut: A Unified Cloud Object Store
Summary: Walnut is a unified low-level object store for Hadoop, MObStor, PNUTS, and Yahoo clouds as a shared, elastic storage layer. It uses a quorum-based replication, one-hop client access, and a hybrid object strategy for small and large objects, with synthetic and real-trace experiments. (summarized by gpt-5-nano on Feb 09 2026)
Incoming Non-self Citations Over Time
Authors
- 1. Jianjun Chen (Yahoo)
- 2. Christopher Douglas (Yahoo)
- 3. Michi Mutsuzaki (Yahoo)
- 4. Patrick Quaid (Yahoo)
- 5. Raghu Ramakrishnan (Yahoo)
- 6. Sriram Rao (Yahoo)
- 7. Russell Sears (Yahoo)
BibTeX Citation
@inproceedings{chen_sigmod12,
title = {{Walnut: A Unified Cloud Object Store}},
author = {Chen, Jianjun and Douglas, Christopher and Mutsuzaki, Michi and Quaid, Patrick and Ramakrishnan, Raghu and Rao, Sriram and Sears, Russell},
series = {{SIGMOD} '12},
booktitle = {Proceedings of the {ACM} {SIGMOD} International Conference on Management of Data},
publisher = {Association for Computing Machinery},
doi = {10.1145/2213836.2213947},
url = {https://dl.acm.org/doi/10.1145/2213836.2213947},
year = {2012}
}Incoming Citations (Sorted by Pagerank)
Showing 3 of 3 citing papers.
| Rank | Citing Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 275 | bLSM: A General Purpose Log Structured Merge Tree | 2012 | SIGMOD | 0.00022630189 |
| 831 | Dostoevsky: Better Space-Time Trade-Offs for LSM-Tree Based Key-Value Stores via Adaptive Removal of Superfluous Merging | 2018 | SIGMOD | 0.00013748512 |
| 857 | SlimDB: A Space-Efficient Key-Value Storage Engine For Semi-Sorted Data | 2017 | VLDB | 0.00013568886 |
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Outgoing Citations (Sorted by Pagerank)
Showing 6 of 6 cited papers.
Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.
| Rank | Cited Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 47 | PNUTS: Yahoo!'s Hosted Data Serving Platform | 2008 | VLDB | 0.00044503718 |
| 144 | Megastore: Providing Scalable, Highly Available Storage for Interactive Services | 2011 | CIDR | 0.00029554682 |
| 275 | bLSM: A General Purpose Log Structured Merge Tree | 2012 | SIGMOD | 0.00022630189 |
| 1,023 | Extreme Scale with Full SQL Language Support in Microsoft SQL Azure | 2010 | SIGMOD | 0.00012591922 |
| 1,267 | Using Paxos to Build a Scalable, Consistent, and Highly Available Datastore | 2011 | VLDB | 0.0001140641 |
| 5,165 | Advances in Flash Memory SSD Technology for Enterprise Database Applications | 2009 | SIGMOD | 6.3371139e-05 |
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