Vault 2015

Using the full potential of all-flash arrays not only requires a high-bandwidth and low-latency communication network but also requires optimized SCSI LLD drivers. The SCSI multiqueue approach that has been merged in Linux kernel 3.17 enables higher performance and lower latency. Levering the full potential of the SCSI multiqueue approach is only possible by integrating support for multiple hardware queues in the SCSI LLD. The SCSI RDMA Protocol (SRP) initiator driver is a SCSI LLD driver that enables access to remote storage over network technologies that support RDMA, e.g. InfiniBand, iWARP and RoCE. During this presentation it will be explained why the recently posted SRP initiator patches resulted in a very significant performance improvement and also how that performance improvement has been realized.