The Dawn of Disaggregation and the Coherence Conundrum: A Call for Federated Coherence
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866917995556634624 |
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| author | Hong, Jaewan Aguilera, Marcos K. Amaro, Emmanuel Liu, Vincent Panda, Aurojit Stoica, Ion |
| author_facet | Hong, Jaewan Aguilera, Marcos K. Amaro, Emmanuel Liu, Vincent Panda, Aurojit Stoica, Ion |
| contents | Disaggregated memory is an upcoming data center technology that will allow nodes (servers) to share data efficiently. Sharing data creates a debate on the level of cache coherence the system should provide. While current proposals aim to provide coherence for all or parts of the disaggregated memory, we argue that this approach is problematic, because of scalability limitations and hardware complexity. Instead, we propose and formally define federated coherence, a model that provides coherence only within nodes, not across nodes. Federated coherence can use current intra-node coherence provided by processors without requiring expensive mechanisms for inter-node coherence. Developers can use federated coherence with a few simple programming paradigms and a synchronization library. We sketch some potential applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_16324 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The Dawn of Disaggregation and the Coherence Conundrum: A Call for Federated Coherence Hong, Jaewan Aguilera, Marcos K. Amaro, Emmanuel Liu, Vincent Panda, Aurojit Stoica, Ion Distributed, Parallel, and Cluster Computing Hardware Architecture Disaggregated memory is an upcoming data center technology that will allow nodes (servers) to share data efficiently. Sharing data creates a debate on the level of cache coherence the system should provide. While current proposals aim to provide coherence for all or parts of the disaggregated memory, we argue that this approach is problematic, because of scalability limitations and hardware complexity. Instead, we propose and formally define federated coherence, a model that provides coherence only within nodes, not across nodes. Federated coherence can use current intra-node coherence provided by processors without requiring expensive mechanisms for inter-node coherence. Developers can use federated coherence with a few simple programming paradigms and a synchronization library. We sketch some potential applications. |
| title | The Dawn of Disaggregation and the Coherence Conundrum: A Call for Federated Coherence |
| topic | Distributed, Parallel, and Cluster Computing Hardware Architecture |
| url | https://arxiv.org/abs/2504.16324 |