The basic layout of the topology table is shown in the table below.
FUJI | Full interconnects | Partial interconnects | Unconnected devices | ||
|---|---|---|---|---|---|
Int 1 | Int 2 | Int 3 | Int 4 | ||
fuji2 | eth0 eth2 | eth1 | eth3 | eth5 | eth4 eth6 |
fuji3 | eth0 | eth2 | missing | eth1 | |
fuji4 | eth1 | eth2 | eth3 | missing | eth4 |
The upper-left-hand corner of the topology table gives the CF cluster name. Below it, the names of all of the nodes in the cluster are listed.
The CF devices are organized into three major categories:
Full interconnects - Have working CF communications to each of the nodes in the cluster.
Partial interconnects - Have working CF communications to at least two nodes in the cluster, but not to all of the nodes.
Unconnected devices - Have no working CF communications to any node in the cluster.
If a particular category is not present, it will be omitted from the topology table. For example, if the cluster in "Table 6.1 Basic layout of the topology table" had no partial interconnects, then the table headings would list only full interconnects and unconnected devices (as well as the left-most column giving the clustername and node names).
Within the full interconnects and partial interconnects category, the devices are further sorted into separate interconnects. Each column under an Int number heading represents all the devices on an interconnect. (The column header Int is an abbreviation for Interconnect.) For example, in "Table 6.1 Basic layout of the topology table", there are two full interconnects listed under the column headings of Int 1 and Int 2.
Each row for a node represents possible CF devices for that node.
Thus, in "Table 6.1 Basic layout of the topology table", Interconnect 1 is a full interconnect. It is attached to eth0 and eth2 on fuji2. On fuji3, it is attached to eth0, and on fuji4, it is attached to eth1.
Since CF runs over Ethernet devices, the ethn devices in "Table 6.1 Basic layout of the topology table" represent the Ethernet devices found on the various systems. The actual names of these devices will vary depending on the type of Ethernet controllers on the system. For nodes whose CF driver was loaded with -L, only configured devices will be shown.
It should be noted that the numbering used for the interconnects is purely a convention used only in the topology table to make the display easier to read. The underlying CF product does not number its interconnects. CF itself only knows about CF devices and point-to-point routes.
If a node does not have a device on a particular partial interconnect, then the word missing will be printed in that node's cell in the partial interconnects column. For example, in "Table 6.1 Basic layout of the topology table", fuji3 does not have a device for the partial interconnect labeled Int 3.
