In order to increase client capacity and performance, storage systems have begun to utilize the advantages offered by modern interconnects. Previously storage has been transported over costly fibre channel networks or ubiquitous but low performance Ethernet networks. However, with the adoption of the iSCSI extensions for RDMA (iSER) it is now possible to use RDMA based interconnects for storage while leveraging existing iSCSI tools and deployments. Building on previous work with an object-based storage device emulator using the iSCSI transport, we extend its functionality to include iSER. Using an RDMA transport brings with it many design issues including the need register memory to be used by the network, and how to bridge the quite different RDMA completion semantics with existing event management based on file descriptors. Experiments demonstrate reduced latency and greatly increased throughput compared to iSCSI implementations both on Gigabit Ethernet and on IP over InfiniBand.
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机译：为了提高客户端容量和性能，存储系统已经开始利用现代互连提供的优势。以前存储过昂贵的光纤通道网络或普遍存在但低性能以太网网络。但是，通过采用RDMA（ISER）的iSCSI扩展，现在可以使用基于RDMA的互连来存储，同时利用现有的iSCSI工具和部署。在以前的工作与使用iSCSI传输的基于对象的存储设备仿真器建立工作，我们将其功能扩展为包含ISER。使用RDMA传输带来了许多设计问题，包括网络需要使用的需要注册存储器，以及如何基于文件描述符与现有事件管理桥接相当不同的RDMA完成语义。实验表明，与千兆以太网和IP Over Infiniband上的iSCSI实现相比，延迟减少和大大增加了吞吐量。
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