Node and Host Name Sizes on HP-UX: Using the Expanded Capabilities of HP-UX

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HP Product Limitations
This section describes the limitations of HP software products in support of node names longer than 8
bytes or host names longer than 64 bytes. Some of these limitations might be removed in product or
OS updates made available after the publication of this document. Providers of third-party and
proprietary software can also have some limitations.
Note that this list might not be complete. Any other important limitations encountered by customers
should be reported to HP.
C/C++ Compilers
The Function-Level Versioning (FLV) feature of the C/C++ compilers is required to support
application program updates for expanded node and host names. The following table lists
the minimum compiler versions that support FLV. Earlier versions do not support FLV and,
therefore, do not support compilation of programs updated for expanded node and host
names.
Optional Product Description
Bundle/Product
Name
Minimum
Version
Needed for
Node/Host
Name
Expansion
HP C/aC++ Developer's Bundle - PA C B9007AA B.11.23.08
HP C/aC++ Developer's Bundle - PA aC++ B9007AA C.03.62
HP C/aC++ Developer's Bundle - IPF B9007AA A.06.00
Client Systems (Various Network Utilities)
Versions of HP-UX prior to 11i version 2 May 2005 Update do not support expanded host
names. Therefore, various client utilities on prior HP-UX versions might not be able to access
servers that have very long host names. For example, utilities such as remsh(1)might not
be able to access servers with canonical names (names with domains added) longer than 63
bytes. Similarly, NFS client systems having earlier OS versions installed cannot access NFS
servers having names longer than 31 bytes (excluding null terminator). Therefore, HP-UX
NFS server systems should not be assigned longer names unless all HP-UX client systems that
access that server have been updated.
Common Desktop Environment (CDE)
In configurations with a long host-name set, graphical user interface applications might not
display the entire host name. The number of bytes in the host name that are actually
displayed can vary with display and font size.