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2 – InfiniPath Cluster Administration
Configuration and Startup
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and unmounted when the infinipath script is invoked with the "stop" option (e.g. at
system shutdown).
The layout of the filesystem is as follows:
atomic_stats
00/
01/
...
The atomic_stats file contains general driver statistics. There is one numbered
directory per InfiniPath device on the system. Each numbered directory contains
the following files of per-device statistics:
atomic_counters
node_info
port_info
The atomic_counters file contains counters for the device: examples would be
interrupts received, bytes and packets in and out, and so on. The
node_info file
contains information such as the device’s GUID. The
port_info file contains
information for each port on the device. An example would be the port LID.
2.4.5
Subnet Management Agent
Each node in an InfiniPath cluster runs a Subnet Management Agent (SMA), which
carries out two-way communication with the Subnet Manager (SM) running on one
or more managed switches. The Subnet Manager is responsible for network
initialization (topology discovery), configuration, and maintenance. The Subnet
Manager also assigns and manages InfiniBand multicast groups, such as the group
used for broadcast purposes by the
ipath_ether driver. The primary functions of
the SMA are to keep the SM informed whether a node is alive and to get the node’s
assigned identifier (LID) from the SM.
2.4.6
Layered Ethernet Driver
The layered Ethernet component ipath_ether provides almost complete Ethernet
software functionality over the InfiniPath fabric. At startup this is bound to some
Ethernet device
ethx. All Ethernet functions are available through this device in a
transparent way, except that Ethernet multicasting is not supported. Broadcasting
is supported. You can use all the usual command line and GUI-based configuration
tools on this Ethernet. Configuration of
ipath_ether is optional.
These instructions are for enabling TCP-IP networking over the InfiniPath link. To
enable IPoIB networking, see section 2.4.7.1.