User Manual

Driver FeaturesRev 1.8.2
Mellanox Technologies
14
4 Driver Features
4.1 SCSI RDMA Protocol
4.1.1 SRP Overview
The InfiniBand package includes a storage module called SRP, which causes each InfiniBand
port on the VMware ESX Server machine to be exposed as one or more physical storage adapt
-
ers, also referred to as vmhbas. To verify that all supported InfiniBand ports on the host are rec-
ognized and up, perform the following steps:
1. Connect to the VMware ESX Server machine using the interface of VMware vSPhere Client.
2. Select the "Configuration" tab.
3. Click the "Storage Adapters" entry which appears in the "Hardware" list. A "Storage Adapt-
ers" list is displayed, describing per device the "Device" it resides on and its type. InfiniBand
storage adapters will appear as SCSI adapters.
InfiniBand storage adapters are listed under HCA name as follow:
• MT25418[ConnectX VPI - 10GigE/IB DDR, PCIe 2.0 2.5GT/s]
• vmhba_mlx4_0.1.1 SCSI
• vmhba_mlx4_0.2.1 SCSI
4. Click on the storage device to display a window with additional details (e.g. Model, number
of targets, Logical Units Numbers and their details).
4.1.1.1 Module Configuration
The SRP module is configured upon installation to default values. You can use the esxcfg-mod-
ule utility (available in the service console) to manually configure SRP.
1. To disable the SRP module run:
2. Additionally, you can modify the default parameters of the SRP module, such as the maxi-
mum number of targets per SCSI host. To retrieve the list and description of the parameters
supported by the SRP module, run:
3. To check which parameters are currently used by SRP module, run:
4. To set a new parameter, run:
5. To apply your changes, reboot the machine:
All the features supported by a storage adapter are also supported by an InfiniBand
SCSI storage adapter. Setting the features is performed transparently.
cos# esxcfg-module ib_srp -d
cos# vmkload_mod ib_srp -s
cos# esxcfg-module ib_srp -g
cos# esxcfg-module ib_srp -s <param=value>
cos# reboot