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HP Fabric Clustering System Release Notes, September 2004

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HP Fabric Clustering System
Known Problems and Issues
Chapter
7
Availability in Native Languages
The HP Fabric Clustering System is currently available in English only.
Known Problems and Issues
Reset of an HCA
Before using the itutil -R command to reset an HCA, be sure to kill all applications in the fabric, or a panic
may occur.
Limit on Multicast Groups
The following restrictions only apply to HP Fabric Clustering System fabrics connected through switches:
they do not apply to point-to-point fabrics.
Restrictions for IB subnets with hosts using IPv4 only:
Applications using IPv4 multicast will be limited to 30 distinct multicast groups for the entire IB subnet.
Restrictions for IB subnets with hosts using IPv4 and IPv6:
In such configurations, 28 distinct multicast groups are available for the entire IB subnet. Each IPv6
interface will consume 1 unique multicast group. Any remaining multicast groups can be used by
applications.
Applications Using MPI
Applications that use the Message Passing Interface (MPI) must belong to a group for which the privileges
include MLOCK. If an application uses MPI, you must change its group’s privilege to MLOCK each time the
system is rebooted.
To do this, log in as root and issue this command:
/usr/bin/setprivgrp group_name MLOCK
NOTE The setprivgrp command is not MP safe.
Next, ensure that the group’s privileges contain MLOCK, by issuing this command:
/usr/bin/getprivgrp group_name
If you do not set the group’s privilege to include MLOCK, the application will fail in the function
it_evd_create() with the error IT_ERR_RESOURCES (77).
For more information about MPI, see the document titled HP MPI Version 2.0.1 for HP-UX, Release Note.
Interaction with HyperFabric Driver
The HP Fabric Clustering System driver will not co-exist with HyperFabric driver versions prior to
B.11.23.01. The HyperFabric driver versions must be upgraded to version B.11.23.01 before installing the HP
Fabric Clustering System driver. Failure to upgrade the HyperFabric driver to version B.11.23.01 will result
in a system panic if HP Fabric Clustering System or HyperFabric commands are issued.