Users Guide

13–NVMe-oF Configuration with RDMA
Preconditioning the Target Server
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5. Connect to the discovered NVMe-oF target (nvme-qlogic-tgt1) using the
NQN. Issue the following command after each server reboot. For example:
# nvme connect -t rdma -n nvme-qlogic-tgt1 -a 1.1.1.1 -s 1023
6. Confirm the NVMe-oF target connection with the NVMe-oF device as
follows:
# dmesg | grep nvme
# lsblk
# list nvme
Figure 13-3 shows an example.
Figure 13-3. Confirm NVMe-oF Connection
Preconditioning the Target Server
NVMe target servers that are tested out-of-the-box show a higher-than-expected
performance. Before running a benchmark, the target server needs to be prefilled
or preconditioned.
To precondition the target server:
1. Secure-erase the target server with vendor-specific tools (similar to
formatting). This test example uses an Intel NVMe SSD device, which
requires the Intel Data Center Tool that is available at the following link:
https://downloadcenter.intel.com/download/23931/Intel-Solid-State-Drive-
Data-Center-Tool
2. Precondition the target server (nvme0n1) with data, which guarantees that all
available memory is filled. This example uses the “DD” disk utility:
# dd if=/dev/zero bs=1024k of=/dev/nvme0n1