User guide

IB0054606-02 A G-1
G Commands and Files
The most useful commands and files for debugging, and common tasks, are
presented in the following sections. Many of these commands and files have been
discussed elsewhere in the documentation. This information is summarized and
repeated here for your convenience.
Check Cluster Homogeneity with
ipath_checkout
Many problems can be attributed to the lack of homogeneity in the cluster
environment. Use the following items as a checklist for verifying homogeneity. A
difference in any one of these items in your cluster may cause problems:
 Kernels
 Distributions
 Versions of the QLogic boards
 Runtime and build environments

.o files from different compilers
 Libraries
 Processor/link speeds
 PIO bandwidth
 MTUs
With the exception of finding any differences between the runtime and build
environments,
ipath_checkout will pick up information on all the above items.
Other programs useful for verifying homogeneity are listed in Table G -1. More
details on ipath_checkout are in “ipath_checkout” on page G-25.