R2 is a communication library over RDMA, which aimes at fast and easy use of RDMA. It is built over ibverbs, with minimal dependencies. It provides several new abstractions for easier use of RDMA, such as high-performance messaging primitives, lightweight async one-sided RDMA operations using corotuines. R2 is well-tuned to achieved the best-possible performance with minimal overhead due to better abstractions. It is part of DrTM+H, a high performance experimantal transactional engine using RDMA.

R2 is released under the Apache 2.0 license.

As R2 is the refined execution framework of DrTM+H, if you use R2 in your research, please cite our paper:

@inproceedings {drtmhosdi18,
    author = {Xingda Wei and Zhiyuan Dong and Rong Chen and Haibo Chen},
    title = {Deconstructing RDMA-enabled Distributed Transactions: Hybrid is Better!},
    booktitle = {13th {USENIX} Symposium on Operating Systems Design and Implementation ({OSDI} 18)},
    year = {2018},
    isbn = {978-1-939133-08-3},
    address = {Carlsbad, CA},
    pages = {233--251},
    url = {https://www.usenix.org/conference/osdi18/presentation/wei},
    publisher = {{USENIX} Association},
    month = oct,
}