human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "fastfabric scaling hyperledger fabric to 20 000 transactions per second"
  Abstract: Blockchain technologies are expected to make a significant impact on a variety of industries. However, one issue holding them back is their limited transaction throughput, especially compared to established solutions such as distributed database systems. In this paper, we re-architect a modern permissioned blockchain system, Hyperledger Fabric, to increase transaction throughput from 3,000 to 20,000 transactions per second. We focus on performance bottlenecks beyond the consensus mechanism, and we propose architectural changes that reduce computation and I/O overhead during transaction ordering and validation to greatly improve throughput. Notably, our optimizations are fully plug-and-play and do not require any interface changes to Hyperledger Fabric.

Connected through hyperedge HE-1 (induced by source paper "xox fabric a hybrid approach to blockchain transaction execution"):
  with members:
    - "parblockchain leveraging transaction parallelism in permissioned blockchain systems"
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "blockbench a framework for analyzing private blockchains"

Connected through hyperedge HE-2 (induced by source paper "scaling hyperledger fabric using pipelined execution and sparse peers"):
  with members:
    - "blockchain meets database design and implementation of a blockchain relational database"
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "towards scaling blockchain systems via sharding"

Connected through hyperedge HE-3 (induced by source paper "streamchain rethinking blockchain for datacenters"):
  with members:
    - "a byzantine fault tolerant ordering service for the hyperledger fabric blockchain platform"

Connected through hyperedge HE-4 (induced by source paper "sharper sharding permissioned blockchains over network clusters"):
  with members:
    - "resilientdb global scale resilient blockchain fabric"
    - "parblockchain leveraging transaction parallelism in permissioned blockchain systems"
    - "topological analysis of bitcoin s lightning network"
    - "scaling blockchain databases through parallel resilient consensus paradigm"
    - "seemore a fault tolerant protocol for hybrid cloud environments"
    - "streamchain do blockchains need blocks"
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "towards scaling blockchain systems via sharding"

Connected through hyperedge HE-5 (induced by source paper "parblockchain leveraging transaction parallelism in permissioned blockchain systems"):
  with members:
    - "trusted multi party computation and verifiable simulations a scalable blockchain approach"
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "performance benchmarking and optimizing hyperledger fabric blockchain platform"
    - "blockchains consensus protocols in the wild"
    - "a byzantine fault tolerant ordering service for the hyperledger fabric blockchain platform"
    - "adding concurrency to smart contracts"
    - "dgcc a new dependency graph based concurrency control protocol for multicore database systems"
    - "rethinking serializable multiversion concurrency control"

Connected through hyperedge HE-6 (induced by source paper "consentio managing consent to data access using permissioned blockchains"):
  with members:
    - "parblockchain leveraging transaction parallelism in permissioned blockchain systems"
    - "a blockchain based scheme for access control in e health scenarios"
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "performance benchmarking and optimizing hyperledger fabric blockchain platform"
    - "smart contract based access control for the internet of things"
    - "decentralized user centric access control using pubsub over blockchain"
    - "secure and trustable electronic medical records sharing using blockchain"

Connected through hyperedge HE-7 (induced by source paper "performance tuning and scaling enterprise blockchain applications"):
  with members:
    - "optimizing validation phase of hyperledger fabric"
    - "xox fabric a hybrid approach to transaction execution"
    - "hotstuff bft consensus in the lens of blockchain"
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "casper the friendly finality gadget"
    - "blockbench a framework for analyzing private blockchains"

Connected through hyperedge HE-8 (induced by source paper "optimizing validation phase of hyperledger fabric"):
  with members:
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "performance benchmarking and optimizing hyperledger fabric blockchain platform"
    - "how to databasify a blockchain the case of hyperledger fabric"
    - "consensus in the age of blockchains"
    - "blockbench a framework for analyzing private blockchains"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.DC(Distributed, Parallel, and Cluster Computing)